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// Type definitions for React 17.0
// Project: http://facebook.github.io/react/
// Definitions by: Asana <https://asana.com>
// AssureSign <http://www.assuresign.com>
// Microsoft <https://microsoft.com>
// John Reilly <https://github.com/johnnyreilly>
// Benoit Benezech <https://github.com/bbenezech>
// Patricio Zavolinsky <https://github.com/pzavolinsky>
// Eric Anderson <https://github.com/ericanderson>
// Dovydas Navickas <https://github.com/DovydasNavickas>
// Josh Rutherford <https://github.com/theruther4d>
// Guilherme Hübner <https://github.com/guilhermehubner>
// Ferdy Budhidharma <https://github.com/ferdaber>
// Johann Rakotoharisoa <https://github.com/jrakotoharisoa>
// Olivier Pascal <https://github.com/pascaloliv>
// Martin Hochel <https://github.com/hotell>
// Frank Li <https://github.com/franklixuefei>
// Jessica Franco <https://github.com/Jessidhia>
// Saransh Kataria <https://github.com/saranshkataria>
// Kanitkorn Sujautra <https://github.com/lukyth>
// Sebastian Silbermann <https://github.com/eps1lon>
// Kyle Scully <https://github.com/zieka>
// Cong Zhang <https://github.com/dancerphil>
// Dimitri Mitropoulos <https://github.com/dimitropoulos>
// JongChan Choi <https://github.com/disjukr>
// Victor Magalhães <https://github.com/vhfmag>
// Dale Tan <https://github.com/hellatan>
// Priyanshu Rav <https://github.com/priyanshurav>
// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
// TypeScript Version: 2.8

// NOTE: Users of the upcoming React 18 release should add a reference
// to 'react/next' in their project. See next.d.ts's top comment
// for reference and documentation on how exactly to do it.

// NOTE: Users of the `experimental` builds of React should add a reference
// to 'react/experimental' in their project. See experimental.d.ts's top comment
// for reference and documentation on how exactly to do it.

/// <reference path="global.d.ts" />

import * as CSS from 'csstype';
import * as PropTypes from 'prop-types';
import { Interaction as SchedulerInteraction } from 'scheduler/tracing';

type NativeAnimationEvent = AnimationEvent;
type NativeClipboardEvent = ClipboardEvent;
type NativeCompositionEvent = CompositionEvent;
type NativeDragEvent = DragEvent;
type NativeFocusEvent = FocusEvent;
type NativeKeyboardEvent = KeyboardEvent;
type NativeMouseEvent = MouseEvent;
type NativeTouchEvent = TouchEvent;
type NativePointerEvent = PointerEvent;
type NativeTransitionEvent = TransitionEvent;
type NativeUIEvent = UIEvent;
type NativeWheelEvent = WheelEvent;
type Booleanish = boolean | 'true' | 'false';

declare const UNDEFINED_VOID_ONLY: unique symbol;
// Destructors are only allowed to return void.
type Destructor = () => void | { [UNDEFINED_VOID_ONLY]: never };

// tslint:disable-next-line:export-just-namespace
export = React;
export as namespace React;

declare namespace React {
    //
    // React Elements
    // ----------------------------------------------------------------------

type ElementType =
 {
 [K in keyof JSX.IntrinsicElements]: P extends JSX.IntrinsicElements[K] ? K : never
 }[keyof JSX.IntrinsicElements] |
 ComponentType;
 /**
 * @deprecated Please use `ElementType`
 */
 type ReactType = ElementType;
 type ComponentType = ComponentClass | FunctionComponent;

type JSXElementConstructor =
 | ((props: P) => ReactElement<any, any> | null)
 | (new (props: P) => Component<any, any>);

interface RefObject<T> {
 readonly current: T | null;
 }
 type RefCallback<T> = { bivarianceHack(instance: T | null): void }["bivarianceHack"];
 type Ref<T> = RefCallback<T> | RefObject<T> | null;
 type LegacyRef<T> = string | Ref<T>;
 /**
 * Gets the instance type for a React element. The instance will be different for various component types:
 *
 * - React class components will be the class instance. So if you had `class Foo extends React.Component<{}> {}`
 * and used `React.ElementRef<typeof Foo>` then the type would be the instance of `Foo`.
 * - React stateless functional components do not have a backing instance and so `React.ElementRef<typeof Bar>`
 * (when `Bar` is `function Bar() {}`) will give you the `undefined` type.
 * - JSX intrinsics like `div` will give you their DOM instance. For `React.ElementRef<'div'>` that would be
 * `HTMLDivElement`. For `React.ElementRef<'input'>` that would be `HTMLInputElement`.
 * - React stateless functional components that forward a `ref` will give you the `ElementRef` of the forwarded
 * to component.
 *
 * `C` must be the type _of_ a React component so you need to use typeof as in React.ElementRef<typeof MyComponent>.
 *
 * @todo In Flow, this works a little different with forwarded refs and the `AbstractComponent` that
 * `React.forwardRef()` returns.
 */
 type ElementRef<
 C extends
 | ForwardRefExoticComponent<any>
 | { new (props: any): Component<any> }
 | ((props: any, context?: any) => ReactElement | null)
 | keyof JSX.IntrinsicElements
 > =
 // need to check first if `ref` is a valid prop for ts@3.0
 // otherwise it will infer `{}` instead of `never`
 "ref" extends keyof ComponentPropsWithRef<C>
 ? NonNullable<ComponentPropsWithRef<C>["ref"]> extends Ref<
 infer Instance
 >
 ? Instance
 : never
 : never;

type ComponentState = any;

type Key = string | number;

/**
 * @internal You shouldn't need to use this type since you never see these attributes
 * inside your component or have to validate them.
 */
 interface Attributes {
 key?: Key | null | undefined;
 }
 interface RefAttributes<T> extends Attributes {
 ref?: Ref<T> | undefined;
 }
 interface ClassAttributes<T> extends Attributes {
 ref?: LegacyRef<T> | undefined;
 }

interface ReactElement = string | JSXElementConstructor<any>> {
 type: T;
 props: P;
 key: Key | null;
 }

interface ReactComponentElement<
 T extends keyof JSX.IntrinsicElements | JSXElementConstructor<any>,
 P = Pick<ComponentProps<T>, Exclude<keyof ComponentProps<T>, 'key' | 'ref'>>
 > extends ReactElement<P, Exclude<T, number>> { }

/**
 * @deprecated Please use `FunctionComponentElement`
 */
 type SFCElement = FunctionComponentElement;

interface FunctionComponentElement extends ReactElement<P, FunctionComponent> {
 ref?: ('ref' extends keyof P ? P extends { ref?: infer R | undefined } ? R : never : never) | undefined;
 }

type CElement<P, T extends Component<P, ComponentState>> = ComponentElement<P, T>;
 interface ComponentElement<P, T extends Component<P, ComponentState>> extends ReactElement<P, ComponentClass> {
 ref?: LegacyRef<T> | undefined;
 }

type ClassicElement = CElement<P, ClassicComponent<P, ComponentState>>;

// string fallback for custom web-components
 interface DOMElement | SVGAttributes<T>, T extends Element> extends ReactElement<P, string> {
 ref: LegacyRef<T>;
 }

// ReactHTML for ReactHTMLElement
 interface ReactHTMLElement<T extends HTMLElement> extends DetailedReactHTMLElement<AllHTMLAttributes<T>, T> { }

interface DetailedReactHTMLElement, T extends HTMLElement> extends DOMElement<P, T> {
 type: keyof ReactHTML;
 }

// ReactSVG for ReactSVGElement
 interface ReactSVGElement extends DOMElement<SVGAttributes<SVGElement>, SVGElement> {
 type: keyof ReactSVG;
 }

interface ReactPortal extends ReactElement {
        key: Key | null;
        children: ReactNode;
    }

//
    // Factories
    // ----------------------------------------------------------------------

type Factory = (props?: Attributes & P, ...children: ReactNode[]) => ReactElement;

/**
 * @deprecated Please use `FunctionComponentFactory`
 */
 type SFCFactory = FunctionComponentFactory;

type FunctionComponentFactory = (props?: Attributes & P, ...children: ReactNode[]) => FunctionComponentElement;

type ComponentFactory<P, T extends Component<P, ComponentState>> =
 (props?: ClassAttributes<T> & P, ...children: ReactNode[]) => CElement<P, T>;

type CFactory<P, T extends Component<P, ComponentState>> = ComponentFactory<P, T>;
 type ClassicFactory = CFactory<P, ClassicComponent<P, ComponentState>>;

type DOMFactory, T extends Element> =
 (props?: ClassAttributes<T> & P | null, ...children: ReactNode[]) => DOMElement<P, T>;

interface HTMLFactory<T extends HTMLElement> extends DetailedHTMLFactory<AllHTMLAttributes<T>, T> {}

interface DetailedHTMLFactory, T extends HTMLElement> extends DOMFactory<P, T> {
 (props?: ClassAttributes<T> & P | null, ...children: ReactNode[]): DetailedReactHTMLElement<P, T>;
 }

interface SVGFactory extends DOMFactory<SVGAttributes<SVGElement>, SVGElement> {
 (props?: ClassAttributes<SVGElement> & SVGAttributes<SVGElement> | null, ...children: ReactNode[]): ReactSVGElement;
 }

//
    // React Nodes
    // http://facebook.github.io/react/docs/glossary.html
    // ----------------------------------------------------------------------

type ReactText = string | number;
    type ReactChild = ReactElement | ReactText;

/**
 * @deprecated Use either `ReactNode[]` if you need an array or `Iterable<ReactNode>` if its passed to a host component.
 */
 interface ReactNodeArray extends ReadonlyArray<ReactNode> {}
 type ReactFragment = {} | Iterable<ReactNode>;
 type ReactNode = ReactChild | ReactFragment | ReactPortal | boolean | null | undefined;

//
    // Top Level API
    // ----------------------------------------------------------------------

// DOM Elements
 function createFactory<T extends HTMLElement>(
 type: keyof ReactHTML): HTMLFactory<T>;
 function createFactory(
 type: keyof ReactSVG): SVGFactory;
 function createFactory, T extends Element>(
 type: string): DOMFactory<P, T>;

// Custom components
 function createFactory(type: FunctionComponent): FunctionComponentFactory;
 function createFactory(
 type: ClassType<P, ClassicComponent<P, ComponentState>, ClassicComponentClass>): CFactory<P, ClassicComponent<P, ComponentState>>;
 function createFactory<P, T extends Component<P, ComponentState>, C extends ComponentClass>(
 type: ClassType<P, T, C>): CFactory<P, T>;
 function createFactory(type: ComponentClass): Factory;

// DOM Elements
 // TODO: generalize this to everything in `keyof ReactHTML`, not just "input"
 function createElement(
 type: "input",
 props?: InputHTMLAttributes<HTMLInputElement> & ClassAttributes<HTMLInputElement> | null,
 ...children: ReactNode[]): DetailedReactHTMLElement<InputHTMLAttributes<HTMLInputElement>, HTMLInputElement>;
 function createElement, T extends HTMLElement>(
 type: keyof ReactHTML,
 props?: ClassAttributes<T> & P | null,
 ...children: ReactNode[]): DetailedReactHTMLElement<P, T>;
 function createElement, T extends SVGElement>(
 type: keyof ReactSVG,
 props?: ClassAttributes<T> & P | null,
 ...children: ReactNode[]): ReactSVGElement;
 function createElement, T extends Element>(
 type: string,
 props?: ClassAttributes<T> & P | null,
 ...children: ReactNode[]): DOMElement<P, T>;

// Custom components

function createElement(
 type: FunctionComponent,
 props?: Attributes & P | null,
 ...children: ReactNode[]): FunctionComponentElement;
 function createElement(
 type: ClassType<P, ClassicComponent<P, ComponentState>, ClassicComponentClass>,
 props?: ClassAttributes<ClassicComponent<P, ComponentState>> & P | null,
 ...children: ReactNode[]): CElement<P, ClassicComponent<P, ComponentState>>;
 function createElement, C extends ComponentClass>(
 type: ClassType<P, T, C>,
 props?: ClassAttributes<T> & P | null,
 ...children: ReactNode[]): CElement<P, T>;
 function createElement(
 type: FunctionComponent | ComponentClass | string,
 props?: Attributes & P | null,
 ...children: ReactNode[]): ReactElement;

// DOM Elements
 // ReactHTMLElement
 function cloneElement, T extends HTMLElement>(
 element: DetailedReactHTMLElement<P, T>,
 props?: P,
 ...children: ReactNode[]): DetailedReactHTMLElement<P, T>;
 // ReactHTMLElement, less specific
 function cloneElement, T extends HTMLElement>(
 element: ReactHTMLElement<T>,
 props?: P,
 ...children: ReactNode[]): ReactHTMLElement<T>;
 // SVGElement
 function cloneElement, T extends SVGElement>(
 element: ReactSVGElement,
 props?: P,
 ...children: ReactNode[]): ReactSVGElement;
 // DOM Element (has to be the last, because type checking stops at first overload that fits)
 function cloneElement, T extends Element>(
 element: DOMElement<P, T>,
 props?: DOMAttributes<T> & P,
 ...children: ReactNode[]): DOMElement<P, T>;

// Custom components
 function cloneElement(
 element: FunctionComponentElement,
 props?: Partial & Attributes,
 ...children: ReactNode[]): FunctionComponentElement;
 function cloneElement<P, T extends Component<P, ComponentState>>(
 element: CElement<P, T>,
 props?: Partial & ClassAttributes<T>,
 ...children: ReactNode[]): CElement<P, T>;
 function cloneElement(
 element: ReactElement,
 props?: Partial & Attributes,
 ...children: ReactNode[]): ReactElement;

// Context via RenderProps
 interface ProviderProps<T> {
 value: T;
 children?: ReactNode | undefined;
 }

interface ConsumerProps<T> {
 children: (value: T) => ReactNode;
 }

// TODO: similar to how Fragment is actually a symbol, the values returned from createContext,
 // forwardRef and memo are actually objects that are treated specially by the renderer; see:
 // https://github.com/facebook/react/blob/v16.6.0/packages/react/src/ReactContext.js#L35-L48
 // https://github.com/facebook/react/blob/v16.6.0/packages/react/src/forwardRef.js#L42-L45
 // https://github.com/facebook/react/blob/v16.6.0/packages/react/src/memo.js#L27-L31
 // However, we have no way of telling the JSX parser that it's a JSX element type or its props other than
 // by pretending to be a normal component.
 //
 // We don't just use ComponentType or FunctionComponent types because you are not supposed to attach statics to this
 // object, but rather to the original function.
 interface ExoticComponent {
 /**
 * **NOTE**: Exotic components are not callable.
 */
 (props: P): (ReactElement|null);
 readonly $$typeof: symbol;
 }

interface NamedExoticComponent extends ExoticComponent {
 displayName?: string | undefined;
 }

interface ProviderExoticComponent extends ExoticComponent {
 propTypes?: WeakValidationMap | undefined;
 }

type ContextType<C extends Context<any>> = C extends Context<infer T> ? T : never;

// NOTE: only the Context object itself can get a displayName
 // https://github.com/facebook/react-devtools/blob/e0b854e4c/backend/attachRendererFiber.js#L310-L325
 type Provider<T> = ProviderExoticComponent<ProviderProps<T>>;
 type Consumer<T> = ExoticComponent<ConsumerProps<T>>;
 interface Context<T> {
 Provider: Provider<T>;
 Consumer: Consumer<T>;
 displayName?: string | undefined;
 }
 function createContext<T>(
 // If you thought this should be optional, see
 // https://github.com/DefinitelyTyped/DefinitelyTyped/pull/24509#issuecomment-382213106
 defaultValue: T,
 ): Context<T>;

function isValidElement(object: {} | null | undefined): object is ReactElement;

const Children: ReactChildren;
 const Fragment: ExoticComponent<{ children?: ReactNode | undefined }>;
 const StrictMode: ExoticComponent<{ children?: ReactNode | undefined }>;

interface SuspenseProps {
        children?: ReactNode | undefined;

/** A fallback react tree to show when a Suspense child (like React.lazy) suspends */
 fallback: NonNullable<ReactNode>|null;
 }
 /**
 * This feature is not yet available for server-side rendering.
 * Suspense support will be added in a later release.
 */
 const Suspense: ExoticComponent<SuspenseProps>;
 const version: string;

/**
 * {@link https://reactjs.org/docs/profiler.html#onrender-callback Profiler API}
 */
 type ProfilerOnRenderCallback = (
 id: string,
 phase: "mount" | "update",
 actualDuration: number,
 baseDuration: number,
 startTime: number,
 commitTime: number,
 interactions: Set<SchedulerInteraction>,
 ) => void;
 interface ProfilerProps {
 children?: ReactNode | undefined;
 id: string;
 onRender: ProfilerOnRenderCallback;
 }

const Profiler: ExoticComponent<ProfilerProps>;

//
    // Component API
    // ----------------------------------------------------------------------

type ReactInstance = Component<any> | Element;

// Base component for plain JS classes
 interface Component extends ComponentLifecycle<P, S, SS> { }
 class Component<P, S> {
 // tslint won't let me format the sample code in a way that vscode likes it :(
 /**
 * If set, `this.context` will be set at runtime to the current value of the given Context.
 *
 * Usage:
 *
 * ```ts
 * type MyContext = number
 * const Ctx = React.createContext<MyContext>(0)
 *
 * class Foo extends React.Component {
 * static contextType = Ctx
 * context!: React.ContextType<typeof Ctx>
 * render () {
 * return <>My context's value: {this.context}</>;
 * }
 * }
 * ```
 *
 * @see https://reactjs.org/docs/context.html#classcontexttype
 */
 static contextType?: Context<any> | undefined;

/**
 * If using the new style context, re-declare this in your class to be the
 * `React.ContextType` of your `static contextType`.
 * Should be used with type annotation or static contextType.
 *
 * ```ts
 * static contextType = MyContext
 * // For TS pre-3.7:
 * context!: React.ContextType<typeof MyContext>
 * // For TS 3.7 and above:
 * declare context: React.ContextType<typeof MyContext>
 * ```
 *
 * @see https://reactjs.org/docs/context.html
 */
 // TODO (TypeScript 3.0): unknown
 context: any;

constructor(props: Readonly | P);
 /**
 * @deprecated
 * @see https://reactjs.org/docs/legacy-context.html
 */
 constructor(props: P, context: any);

// We MUST keep setState() as a unified signature because it allows proper checking of the method return type.
 // See: https://github.com/DefinitelyTyped/DefinitelyTyped/issues/18365#issuecomment-351013257
 // Also, the ` | S` allows intellisense to not be dumbisense
 setState<K extends keyof S>(
 state: ((prevState: Readonly<S>, props: Readonly) => (Pick<S, K> | S | null)) | (Pick<S, K> | S | null),
 callback?: () => void
 ): void;

forceUpdate(callback?: () => void): void;
        render(): ReactNode;

// React.Props<T> is now deprecated, which means that the `children`
 // property is not available on `P` by default, even though you can
 // always pass children as variadic arguments to `createElement`.
 // In the future, if we can define its call signature conditionally
 // on the existence of `children` in `P`, then we should remove this.
 readonly props: Readonly & Readonly<{ children?: ReactNode | undefined }>;
 state: Readonly<S>;
 /**
 * @deprecated
 * https://reactjs.org/docs/refs-and-the-dom.html#legacy-api-string-refs
 */
 refs: {
 [key: string]: ReactInstance
 };
 }

class PureComponent extends Component<P, S, SS> { }

interface ClassicComponent extends Component<P, S> {
 replaceState(nextState: S, callback?: () => void): void;
 isMounted(): boolean;
 getInitialState?(): S;
 }

interface ChildContextProvider<CC> {
 getChildContext(): CC;
 }

//
    // Class Interfaces
    // ----------------------------------------------------------------------

/**
 * @deprecated as of recent React versions, function components can no
 * longer be considered 'stateless'. Please use `FunctionComponent` instead.
 *
 * @see [React Hooks](https://reactjs.org/docs/hooks-intro.html)
 */
 type SFC = FunctionComponent;

type FC = FunctionComponent;

interface FunctionComponent {
 (props: PropsWithChildren, context?: any): ReactElement<any, any> | null;
 propTypes?: WeakValidationMap | undefined;
 contextTypes?: ValidationMap<any> | undefined;
 defaultProps?: Partial | undefined;
 displayName?: string | undefined;
 }

type VFC = VoidFunctionComponent;

interface VoidFunctionComponent {
 (props: P, context?: any): ReactElement<any, any> | null;
 propTypes?: WeakValidationMap | undefined;
 contextTypes?: ValidationMap<any> | undefined;
 defaultProps?: Partial | undefined;
 displayName?: string | undefined;
 }

type ForwardedRef<T> = ((instance: T | null) => void) | MutableRefObject<T | null> | null;

interface ForwardRefRenderFunction<T, P = {}> {
 (props: PropsWithChildren, ref: ForwardedRef<T>): ReactElement | null;
 displayName?: string | undefined;
 // explicit rejected with `never` required due to
 // https://github.com/microsoft/TypeScript/issues/36826
 /**
 * defaultProps are not supported on render functions
 */
 defaultProps?: never | undefined;
 /**
 * propTypes are not supported on render functions
 */
 propTypes?: never | undefined;
 }

/**
 * @deprecated Use ForwardRefRenderFunction. forwardRef doesn't accept a
 * "real" component.
 */
 interface RefForwardingComponent <T, P = {}> extends ForwardRefRenderFunction<T, P> {}

interface ComponentClass extends StaticLifecycle<P, S> {
 new (props: P, context?: any): Component<P, S>;
 propTypes?: WeakValidationMap | undefined;
 contextType?: Context<any> | undefined;
 contextTypes?: ValidationMap<any> | undefined;
 childContextTypes?: ValidationMap<any> | undefined;
 defaultProps?: Partial | undefined;
 displayName?: string | undefined;
 }

interface ClassicComponentClass extends ComponentClass {
 new (props: P, context?: any): ClassicComponent<P, ComponentState>;
 getDefaultProps?(): P;
 }

/**
 * We use an intersection type to infer multiple type parameters from
 * a single argument, which is useful for many top-level API defs.
 * See https://github.com/Microsoft/TypeScript/issues/7234 for more info.
 */
 type ClassType<P, T extends Component<P, ComponentState>, C extends ComponentClass> =
 C &
 (new (props: P, context?: any) => T);

//
    // Component Specs and Lifecycle
    // ----------------------------------------------------------------------

// This should actually be something like `Lifecycle<P, S> | DeprecatedLifecycle<P, S>`,
 // as React will _not_ call the deprecated lifecycle methods if any of the new lifecycle
 // methods are present.
 interface ComponentLifecycle<P, S, SS = any> extends NewLifecycle<P, S, SS>, DeprecatedLifecycle<P, S> {
 /**
 * Called immediately after a component is mounted. Setting state here will trigger re-rendering.
 */
 componentDidMount?(): void;
 /**
 * Called to determine whether the change in props and state should trigger a re-render.
 *
 * `Component` always returns true.
 * `PureComponent` implements a shallow comparison on props and state and returns true if any
 * props or states have changed.
 *
 * If false is returned, `Component#render`, `componentWillUpdate`
 * and `componentDidUpdate` will not be called.
 */
 shouldComponentUpdate?(nextProps: Readonly, nextState: Readonly<S>, nextContext: any): boolean;
 /**
 * Called immediately before a component is destroyed. Perform any necessary cleanup in this method, such as
 * cancelled network requests, or cleaning up any DOM elements created in `componentDidMount`.
 */
 componentWillUnmount?(): void;
 /**
 * Catches exceptions generated in descendant components. Unhandled exceptions will cause
 * the entire component tree to unmount.
 */
 componentDidCatch?(error: Error, errorInfo: ErrorInfo): void;
 }

// Unfortunately, we have no way of declaring that the component constructor must implement this
 interface StaticLifecycle<P, S> {
 getDerivedStateFromProps?: GetDerivedStateFromProps<P, S> | undefined;
 getDerivedStateFromError?: GetDerivedStateFromError<P, S> | undefined;
 }

type GetDerivedStateFromProps<P, S> =
 /**
 * Returns an update to a component's state based on its new props and old state.
 *
 * Note: its presence prevents any of the deprecated lifecycle methods from being invoked
 */
 (nextProps: Readonly, prevState: S) => Partial<S> | null;

type GetDerivedStateFromError<P, S> =
 /**
 * This lifecycle is invoked after an error has been thrown by a descendant component.
 * It receives the error that was thrown as a parameter and should return a value to update state.
 *
 * Note: its presence prevents any of the deprecated lifecycle methods from being invoked
 */
 (error: any) => Partial<S> | null;

// This should be "infer SS" but can't use it yet
 interface NewLifecycle<P, S, SS> {
 /**
 * Runs before React applies the result of `render` to the document, and
 * returns an object to be given to componentDidUpdate. Useful for saving
 * things such as scroll position before `render` causes changes to it.
 *
 * Note: the presence of getSnapshotBeforeUpdate prevents any of the deprecated
 * lifecycle events from running.
 */
 getSnapshotBeforeUpdate?(prevProps: Readonly, prevState: Readonly<S>): SS | null;
 /**
 * Called immediately after updating occurs. Not called for the initial render.
 *
 * The snapshot is only present if getSnapshotBeforeUpdate is present and returns non-null.
 */
 componentDidUpdate?(prevProps: Readonly, prevState: Readonly<S>, snapshot?: SS): void;
 }

interface DeprecatedLifecycle<P, S> {
 /**
 * Called immediately before mounting occurs, and before `Component#render`.
 * Avoid introducing any side-effects or subscriptions in this method.
 *
 * Note: the presence of getSnapshotBeforeUpdate or getDerivedStateFromProps
 * prevents this from being invoked.
 *
 * @deprecated 16.3, use componentDidMount or the constructor instead; will stop working in React 17
 * @see https://reactjs.org/blog/2018/03/27/update-on-async-rendering.html#initializing-state
 * @see https://reactjs.org/blog/2018/03/27/update-on-async-rendering.html#gradual-migration-path
 */
 componentWillMount?(): void;
 /**
 * Called immediately before mounting occurs, and before `Component#render`.
 * Avoid introducing any side-effects or subscriptions in this method.
 *
 * This method will not stop working in React 17.
 *
 * Note: the presence of getSnapshotBeforeUpdate or getDerivedStateFromProps
 * prevents this from being invoked.
 *
 * @deprecated 16.3, use componentDidMount or the constructor instead
 * @see https://reactjs.org/blog/2018/03/27/update-on-async-rendering.html#initializing-state
 * @see https://reactjs.org/blog/2018/03/27/update-on-async-rendering.html#gradual-migration-path
 */
 UNSAFE_componentWillMount?(): void;
 /**
 * Called when the component may be receiving new props.
 * React may call this even if props have not changed, so be sure to compare new and existing
 * props if you only want to handle changes.
 *
 * Calling `Component#setState` generally does not trigger this method.
 *
 * Note: the presence of getSnapshotBeforeUpdate or getDerivedStateFromProps
 * prevents this from being invoked.
 *
 * @deprecated 16.3, use static getDerivedStateFromProps instead; will stop working in React 17
 * @see https://reactjs.org/blog/2018/03/27/update-on-async-rendering.html#updating-state-based-on-props
 * @see https://reactjs.org/blog/2018/03/27/update-on-async-rendering.html#gradual-migration-path
 */
 componentWillReceiveProps?(nextProps: Readonly, nextContext: any): void;
 /**
 * Called when the component may be receiving new props.
 * React may call this even if props have not changed, so be sure to compare new and existing
 * props if you only want to handle changes.
 *
 * Calling `Component#setState` generally does not trigger this method.
 *
 * This method will not stop working in React 17.
 *
 * Note: the presence of getSnapshotBeforeUpdate or getDerivedStateFromProps
 * prevents this from being invoked.
 *
 * @deprecated 16.3, use static getDerivedStateFromProps instead
 * @see https://reactjs.org/blog/2018/03/27/update-on-async-rendering.html#updating-state-based-on-props
 * @see https://reactjs.org/blog/2018/03/27/update-on-async-rendering.html#gradual-migration-path
 */
 UNSAFE_componentWillReceiveProps?(nextProps: Readonly, nextContext: any): void;
 /**
 * Called immediately before rendering when new props or state is received. Not called for the initial render.
 *
 * Note: You cannot call `Component#setState` here.
 *
 * Note: the presence of getSnapshotBeforeUpdate or getDerivedStateFromProps
 * prevents this from being invoked.
 *
 * @deprecated 16.3, use getSnapshotBeforeUpdate instead; will stop working in React 17
 * @see https://reactjs.org/blog/2018/03/27/update-on-async-rendering.html#reading-dom-properties-before-an-update
 * @see https://reactjs.org/blog/2018/03/27/update-on-async-rendering.html#gradual-migration-path
 */
 componentWillUpdate?(nextProps: Readonly, nextState: Readonly<S>, nextContext: any): void;
 /**
 * Called immediately before rendering when new props or state is received. Not called for the initial render.
 *
 * Note: You cannot call `Component#setState` here.
 *
 * This method will not stop working in React 17.
 *
 * Note: the presence of getSnapshotBeforeUpdate or getDerivedStateFromProps
 * prevents this from being invoked.
 *
 * @deprecated 16.3, use getSnapshotBeforeUpdate instead
 * @see https://reactjs.org/blog/2018/03/27/update-on-async-rendering.html#reading-dom-properties-before-an-update
 * @see https://reactjs.org/blog/2018/03/27/update-on-async-rendering.html#gradual-migration-path
 */
 UNSAFE_componentWillUpdate?(nextProps: Readonly, nextState: Readonly<S>, nextContext: any): void;
 }

interface Mixin<P, S> extends ComponentLifecycle<P, S> {
 mixins?: Array<Mixin<P, S>> | undefined;
 statics?: {
 [key: string]: any;
 } | undefined;

displayName?: string | undefined;
 propTypes?: ValidationMap<any> | undefined;
 contextTypes?: ValidationMap<any> | undefined;
 childContextTypes?: ValidationMap<any> | undefined;

getDefaultProps?(): P;
        getInitialState?(): S;
    }

interface ComponentSpec<P, S> extends Mixin<P, S> {
 render(): ReactNode;

[propertyName: string]: any;
    }

function createRef<T>(): RefObject<T>;

// will show `ForwardRef(${Component.displayName || Component.name})` in devtools by default,
 // but can be given its own specific name
 interface ForwardRefExoticComponent extends NamedExoticComponent {
 defaultProps?: Partial | undefined;
 propTypes?: WeakValidationMap | undefined;
 }

function forwardRef<T, P = {}>(render: ForwardRefRenderFunction<T, P>): ForwardRefExoticComponent<PropsWithoutRef & RefAttributes<T>>;

/** Ensures that the props do not include ref at all */
 type PropsWithoutRef =
 // Pick would not be sufficient for this. We'd like to avoid unnecessary mapping and need a distributive conditional to support unions.
 // see: https://www.typescriptlang.org/docs/handbook/2/conditional-types.html#distributive-conditional-types
 // https://github.com/Microsoft/TypeScript/issues/28339
 P extends any ? ('ref' extends keyof P ? Pick<P, Exclude<keyof P, 'ref'>> : P) : P;
 /** Ensures that the props do not include string ref, which cannot be forwarded */
 type PropsWithRef =
 // Just "P extends { ref?: infer R }" looks sufficient, but R will infer as {} if P is {}.
 'ref' extends keyof P
 ? P extends { ref?: infer R | undefined }
 ? string extends R
 ? PropsWithoutRef & { ref?: Exclude<R, string> | undefined }
 : P
 : P
 : P;

type PropsWithChildren = P & { children?: ReactNode | undefined };

/**
 * NOTE: prefer ComponentPropsWithRef, if the ref is forwarded,
 * or ComponentPropsWithoutRef when refs are not supported.
 */
 type ComponentProps<T extends keyof JSX.IntrinsicElements | JSXElementConstructor<any>> =
 T extends JSXElementConstructor<infer P>
 ? P
 : T extends keyof JSX.IntrinsicElements
 ? JSX.IntrinsicElements[T]
 : {};
 type ComponentPropsWithRef<T extends ElementType> =
 T extends ComponentClass<infer P>
 ? PropsWithoutRef & RefAttributes<InstanceType<T>>
 : PropsWithRef<ComponentProps<T>>;
 type ComponentPropsWithoutRef<T extends ElementType> =
 PropsWithoutRef<ComponentProps<T>>;

type ComponentRef<T extends ElementType> = T extends NamedExoticComponent<
 ComponentPropsWithoutRef<T> & RefAttributes<infer Method>
 >
 ? Method
 : ComponentPropsWithRef<T> extends RefAttributes<infer Method>
 ? Method
 : never;

// will show `Memo(${Component.displayName || Component.name})` in devtools by default,
 // but can be given its own specific name
 type MemoExoticComponent<T extends ComponentType<any>> = NamedExoticComponent<ComponentPropsWithRef<T>> & {
 readonly type: T;
 };

function memo(
 Component: FunctionComponent,
 propsAreEqual?: (prevProps: Readonly<PropsWithChildren>, nextProps: Readonly<PropsWithChildren>) => boolean
 ): NamedExoticComponent;
 function memo<T extends ComponentType<any>>(
 Component: T,
 propsAreEqual?: (prevProps: Readonly<ComponentProps<T>>, nextProps: Readonly<ComponentProps<T>>) => boolean
 ): MemoExoticComponent<T>;

type LazyExoticComponent<T extends ComponentType<any>> = ExoticComponent<ComponentPropsWithRef<T>> & {
 readonly _result: T;
 };

function lazy<T extends ComponentType<any>>(
 factory: () => Promise<{ default: T }>
 ): LazyExoticComponent<T>;

//
    // React Hooks
    // ----------------------------------------------------------------------

// based on the code in https://github.com/facebook/react/pull/13968

// Unlike the class component setState, the updates are not allowed to be partial
 type SetStateAction<S> = S | ((prevState: S) => S);
 // this technically does accept a second argument, but it's already under a deprecation warning
 // and it's not even released so probably better to not define it.
 type Dispatch<A> = (value: A) => void;
 // Since action _can_ be undefined, dispatch may be called without any parameters.
 type DispatchWithoutAction = () => void;
 // Unlike redux, the actions _can_ be anything
 type Reducer<S, A> = (prevState: S, action: A) => S;
 // If useReducer accepts a reducer without action, dispatch may be called without any parameters.
 type ReducerWithoutAction<S> = (prevState: S) => S;
 // types used to try and prevent the compiler from reducing S
 // to a supertype common with the second argument to useReducer()
 type ReducerState<R extends Reducer<any, any>> = R extends Reducer<infer S, any> ? S : never;
 type ReducerAction<R extends Reducer<any, any>> = R extends Reducer<any, infer A> ? A : never;
 // The identity check is done with the SameValue algorithm (Object.is), which is stricter than ===
 type ReducerStateWithoutAction<R extends ReducerWithoutAction<any>> =
 R extends ReducerWithoutAction<infer S> ? S : never;
 // TODO (TypeScript 3.0): ReadonlyArray<unknown>
 type DependencyList = ReadonlyArray<any>;

// NOTE: callbacks are _only_ allowed to return either void, or a destructor.
    type EffectCallback = () => (void | Destructor);

interface MutableRefObject<T> {
 current: T;
 }

// This will technically work if you give a Consumer<T> or Provider<T> but it's deprecated and warns
 /**
 * Accepts a context object (the value returned from `React.createContext`) and returns the current
 * context value, as given by the nearest context provider for the given context.
 *
 * @version 16.8.0
 * @see https://reactjs.org/docs/hooks-reference.html#usecontext
 */
 function useContext<T>(context: Context<T>/*, (not public API) observedBits?: number|boolean */): T;
 /**
 * Returns a stateful value, and a function to update it.
 *
 * @version 16.8.0
 * @see https://reactjs.org/docs/hooks-reference.html#usestate
 */
 function useState<S>(initialState: S | (() => S)): [S, Dispatch<SetStateAction<S>>];
 // convenience overload when first argument is omitted
 /**
 * Returns a stateful value, and a function to update it.
 *
 * @version 16.8.0
 * @see https://reactjs.org/docs/hooks-reference.html#usestate
 */
 function useState<S = undefined>(): [S | undefined, Dispatch<SetStateAction<S | undefined>>];
 /**
 * An alternative to `useState`.
 *
 * `useReducer` is usually preferable to `useState` when you have complex state logic that involves
 * multiple sub-values. It also lets you optimize performance for components that trigger deep
 * updates because you can pass `dispatch` down instead of callbacks.
 *
 * @version 16.8.0
 * @see https://reactjs.org/docs/hooks-reference.html#usereducer
 */
 // overload where dispatch could accept 0 arguments.
 function useReducer<R extends ReducerWithoutAction<any>, I>(
 reducer: R,
 initializerArg: I,
 initializer: (arg: I) => ReducerStateWithoutAction<R>
 ): [ReducerStateWithoutAction<R>, DispatchWithoutAction];
 /**
 * An alternative to `useState`.
 *
 * `useReducer` is usually preferable to `useState` when you have complex state logic that involves
 * multiple sub-values. It also lets you optimize performance for components that trigger deep
 * updates because you can pass `dispatch` down instead of callbacks.
 *
 * @version 16.8.0
 * @see https://reactjs.org/docs/hooks-reference.html#usereducer
 */
 // overload where dispatch could accept 0 arguments.
 function useReducer<R extends ReducerWithoutAction<any>>(
 reducer: R,
 initializerArg: ReducerStateWithoutAction<R>,
 initializer?: undefined
 ): [ReducerStateWithoutAction<R>, DispatchWithoutAction];
 /**
 * An alternative to `useState`.
 *
 * `useReducer` is usually preferable to `useState` when you have complex state logic that involves
 * multiple sub-values. It also lets you optimize performance for components that trigger deep
 * updates because you can pass `dispatch` down instead of callbacks.
 *
 * @version 16.8.0
 * @see https://reactjs.org/docs/hooks-reference.html#usereducer
 */
 // overload where "I" may be a subset of ReducerState<R>; used to provide autocompletion.
 // If "I" matches ReducerState<R> exactly then the last overload will allow initializer to be omitted.
 // the last overload effectively behaves as if the identity function (x => x) is the initializer.
 function useReducer<R extends Reducer<any, any>, I>(
 reducer: R,
 initializerArg: I & ReducerState<R>,
 initializer: (arg: I & ReducerState<R>) => ReducerState<R>
 ): [ReducerState<R>, Dispatch<ReducerAction<R>>];
 /**
 * An alternative to `useState`.
 *
 * `useReducer` is usually preferable to `useState` when you have complex state logic that involves
 * multiple sub-values. It also lets you optimize performance for components that trigger deep
 * updates because you can pass `dispatch` down instead of callbacks.
 *
 * @version 16.8.0
 * @see https://reactjs.org/docs/hooks-reference.html#usereducer
 */
 // overload for free "I"; all goes as long as initializer converts it into "ReducerState<R>".
 function useReducer<R extends Reducer<any, any>, I>(
 reducer: R,
 initializerArg: I,
 initializer: (arg: I) => ReducerState<R>
 ): [ReducerState<R>, Dispatch<ReducerAction<R>>];
 /**
 * An alternative to `useState`.
 *
 * `useReducer` is usually preferable to `useState` when you have complex state logic that involves
 * multiple sub-values. It also lets you optimize performance for components that trigger deep
 * updates because you can pass `dispatch` down instead of callbacks.
 *
 * @version 16.8.0
 * @see https://reactjs.org/docs/hooks-reference.html#usereducer
 */

// I'm not sure if I keep this 2-ary or if I make it (2,3)-ary; it's currently (2,3)-ary.
    // The Flow types do have an overload for 3-ary invocation with undefined initializer.

// NOTE: without the ReducerState indirection, TypeScript would reduce S to be the most common
    // supertype between the reducer's return type and the initialState (or the initializer's return type),
    // which would prevent autocompletion from ever working.

// TODO: double-check if this weird overload logic is necessary. It is possible it's either a bug
 // in older versions, or a regression in newer versions of the typescript completion service.
 function useReducer<R extends Reducer<any, any>>(
 reducer: R,
 initialState: ReducerState<R>,
 initializer?: undefined
 ): [ReducerState<R>, Dispatch<ReducerAction<R>>];
 /**
 * `useRef` returns a mutable ref object whose `.current` property is initialized to the passed argument
 * (`initialValue`). The returned object will persist for the full lifetime of the component.
 *
 * Note that `useRef()` is useful for more than the `ref` attribute. It’s handy for keeping any mutable
 * value around similar to how you’d use instance fields in classes.
 *
 * @version 16.8.0
 * @see https://reactjs.org/docs/hooks-reference.html#useref
 */
 function useRef<T>(initialValue: T): MutableRefObject<T>;
 // convenience overload for refs given as a ref prop as they typically start with a null value
 /**
 * `useRef` returns a mutable ref object whose `.current` property is initialized to the passed argument
 * (`initialValue`). The returned object will persist for the full lifetime of the component.
 *
 * Note that `useRef()` is useful for more than the `ref` attribute. It’s handy for keeping any mutable
 * value around similar to how you’d use instance fields in classes.
 *
 * Usage note: if you need the result of useRef to be directly mutable, include `| null` in the type
 * of the generic argument.
 *
 * @version 16.8.0
 * @see https://reactjs.org/docs/hooks-reference.html#useref
 */
 function useRef<T>(initialValue: T|null): RefObject<T>;
 // convenience overload for potentially undefined initialValue / call with 0 arguments
 // has a default to stop it from defaulting to {} instead
 /**
 * `useRef` returns a mutable ref object whose `.current` property is initialized to the passed argument
 * (`initialValue`). The returned object will persist for the full lifetime of the component.
 *
 * Note that `useRef()` is useful for more than the `ref` attribute. It’s handy for keeping any mutable
 * value around similar to how you’d use instance fields in classes.
 *
 * @version 16.8.0
 * @see https://reactjs.org/docs/hooks-reference.html#useref
 */
 function useRef<T = undefined>(): MutableRefObject<T | undefined>;
 /**
 * The signature is identical to `useEffect`, but it fires synchronously after all DOM mutations.
 * Use this to read layout from the DOM and synchronously re-render. Updates scheduled inside
 * `useLayoutEffect` will be flushed synchronously, before the browser has a chance to paint.
 *
 * Prefer the standard `useEffect` when possible to avoid blocking visual updates.
 *
 * If you’re migrating code from a class component, `useLayoutEffect` fires in the same phase as
 * `componentDidMount` and `componentDidUpdate`.
 *
 * @version 16.8.0
 * @see https://reactjs.org/docs/hooks-reference.html#uselayouteffect
 */
 function useLayoutEffect(effect: EffectCallback, deps?: DependencyList): void;
 /**
 * Accepts a function that contains imperative, possibly effectful code.
 *
 * @param effect Imperative function that can return a cleanup function
 * @param deps If present, effect will only activate if the values in the list change.
 *
 * @version 16.8.0
 * @see https://reactjs.org/docs/hooks-reference.html#useeffect
 */
 function useEffect(effect: EffectCallback, deps?: DependencyList): void;
 // NOTE: this does not accept strings, but this will have to be fixed by removing strings from type Ref<T>
 /**
 * `useImperativeHandle` customizes the instance value that is exposed to parent components when using
 * `ref`. As always, imperative code using refs should be avoided in most cases.
 *
 * `useImperativeHandle` should be used with `React.forwardRef`.
 *
 * @version 16.8.0
 * @see https://reactjs.org/docs/hooks-reference.html#useimperativehandle
 */
 function useImperativeHandle<T, R extends T>(ref: Ref<T>|undefined, init: () => R, deps?: DependencyList): void;
 // I made 'inputs' required here and in useMemo as there's no point to memoizing without the memoization key
 // useCallback(X) is identical to just using X, useMemo(() => Y) is identical to just using Y.
 /**
 * `useCallback` will return a memoized version of the callback that only changes if one of the `inputs`
 * has changed.
 *
 * @version 16.8.0
 * @see https://reactjs.org/docs/hooks-reference.html#usecallback
 */
 // TODO (TypeScript 3.0): <T extends (...args: never[]) => unknown>
 function useCallback<T extends (...args: any[]) => any>(callback: T, deps: DependencyList): T;
 /**
 * `useMemo` will only recompute the memoized value when one of the `deps` has changed.
 *
 * Usage note: if calling `useMemo` with a referentially stable function, also give it as the input in
 * the second argument.
 *
 * ```ts
 * function expensive () { ... }
 *
 * function Component () {
 * const expensiveResult = useMemo(expensive, [expensive])
 * return ...
 * }
 * ```
 *
 * @version 16.8.0
 * @see https://reactjs.org/docs/hooks-reference.html#usememo
 */
 // allow undefined, but don't make it optional as that is very likely a mistake
 function useMemo<T>(factory: () => T, deps: DependencyList | undefined): T;
 /**
 * `useDebugValue` can be used to display a label for custom hooks in React DevTools.
 *
 * NOTE: We don’t recommend adding debug values to every custom hook.
 * It’s most valuable for custom hooks that are part of shared libraries.
 *
 * @version 16.8.0
 * @see https://reactjs.org/docs/hooks-reference.html#usedebugvalue
 */
 // the name of the custom hook is itself derived from the function name at runtime:
 // it's just the function name without the "use" prefix.
 function useDebugValue<T>(value: T, format?: (value: T) => any): void;

//
 // Event System
 // ----------------------------------------------------------------------
 // TODO: change any to unknown when moving to TS v3
 interface BaseSyntheticEvent<E = object, C = any, T = any> {
 nativeEvent: E;
 currentTarget: C;
 target: T;
 bubbles: boolean;
 cancelable: boolean;
 defaultPrevented: boolean;
 eventPhase: number;
 isTrusted: boolean;
 preventDefault(): void;
 isDefaultPrevented(): boolean;
 stopPropagation(): void;
 isPropagationStopped(): boolean;
 persist(): void;
 timeStamp: number;
 type: string;
 }

/**
 * currentTarget - a reference to the element on which the event listener is registered.
 *
 * target - a reference to the element from which the event was originally dispatched.
 * This might be a child element to the element on which the event listener is registered.
 * If you thought this should be `EventTarget & T`, see https://github.com/DefinitelyTyped/DefinitelyTyped/issues/11508#issuecomment-256045682
 */
 interface SyntheticEvent<T = Element, E = Event> extends BaseSyntheticEvent<E, EventTarget & T, EventTarget> {}

interface ClipboardEvent<T = Element> extends SyntheticEvent<T, NativeClipboardEvent> {
 clipboardData: DataTransfer;
 }

interface CompositionEvent<T = Element> extends SyntheticEvent<T, NativeCompositionEvent> {
 data: string;
 }

interface DragEvent<T = Element> extends MouseEvent<T, NativeDragEvent> {
 dataTransfer: DataTransfer;
 }

interface PointerEvent<T = Element> extends MouseEvent<T, NativePointerEvent> {
 pointerId: number;
 pressure: number;
 tangentialPressure: number;
 tiltX: number;
 tiltY: number;
 twist: number;
 width: number;
 height: number;
 pointerType: 'mouse' | 'pen' | 'touch';
 isPrimary: boolean;
 }

interface FocusEvent<Target = Element, RelatedTarget = Element> extends SyntheticEvent<Target, NativeFocusEvent> {
 relatedTarget: (EventTarget & RelatedTarget) | null;
 target: EventTarget & Target;
 }

interface FormEvent<T = Element> extends SyntheticEvent<T> {
 }

interface InvalidEvent<T = Element> extends SyntheticEvent<T> {
 target: EventTarget & T;
 }

interface ChangeEvent<T = Element> extends SyntheticEvent<T> {
 target: EventTarget & T;
 }

interface KeyboardEvent<T = Element> extends UIEvent<T, NativeKeyboardEvent> {
 altKey: boolean;
 /** @deprecated */
 charCode: number;
 ctrlKey: boolean;
 code: string;
 /**
 * See [DOM Level 3 Events spec](https://www.w3.org/TR/uievents-key/#keys-modifier). for a list of valid (case-sensitive) arguments to this method.
 */
 getModifierState(key: string): boolean;
 /**
 * See the [DOM Level 3 Events spec](https://www.w3.org/TR/uievents-key/#named-key-attribute-values). for possible values
 */
 key: string;
 /** @deprecated */
 keyCode: number;
 locale: string;
 location: number;
 metaKey: boolean;
 repeat: boolean;
 shiftKey: boolean;
 /** @deprecated */
 which: number;
 }

interface MouseEvent<T = Element, E = NativeMouseEvent> extends UIEvent<T, E> {
 altKey: boolean;
 button: number;
 buttons: number;
 clientX: number;
 clientY: number;
 ctrlKey: boolean;
 /**
 * See [DOM Level 3 Events spec](https://www.w3.org/TR/uievents-key/#keys-modifier). for a list of valid (case-sensitive) arguments to this method.
 */
 getModifierState(key: string): boolean;
 metaKey: boolean;
 movementX: number;
 movementY: number;
 pageX: number;
 pageY: number;
 relatedTarget: EventTarget | null;
 screenX: number;
 screenY: number;
 shiftKey: boolean;
 }

interface TouchEvent<T = Element> extends UIEvent<T, NativeTouchEvent> {
 altKey: boolean;
 changedTouches: TouchList;
 ctrlKey: boolean;
 /**
 * See [DOM Level 3 Events spec](https://www.w3.org/TR/uievents-key/#keys-modifier). for a list of valid (case-sensitive) arguments to this method.
 */
 getModifierState(key: string): boolean;
 metaKey: boolean;
 shiftKey: boolean;
 targetTouches: TouchList;
 touches: TouchList;
 }

interface UIEvent<T = Element, E = NativeUIEvent> extends SyntheticEvent<T, E> {
 detail: number;
 view: AbstractView;
 }

interface WheelEvent<T = Element> extends MouseEvent<T, NativeWheelEvent> {
 deltaMode: number;
 deltaX: number;
 deltaY: number;
 deltaZ: number;
 }

interface AnimationEvent<T = Element> extends SyntheticEvent<T, NativeAnimationEvent> {
 animationName: string;
 elapsedTime: number;
 pseudoElement: string;
 }

interface TransitionEvent<T = Element> extends SyntheticEvent<T, NativeTransitionEvent> {
 elapsedTime: number;
 propertyName: string;
 pseudoElement: string;
 }

//
    // Event Handler Types
    // ----------------------------------------------------------------------

type EventHandler<E extends SyntheticEvent<any>> = { bivarianceHack(event: E): void }["bivarianceHack"];

type ReactEventHandler<T = Element> = EventHandler<SyntheticEvent<T>>;

type ClipboardEventHandler<T = Element> = EventHandler<ClipboardEvent<T>>;
 type CompositionEventHandler<T = Element> = EventHandler<CompositionEvent<T>>;
 type DragEventHandler<T = Element> = EventHandler<DragEvent<T>>;
 type FocusEventHandler<T = Element> = EventHandler<FocusEvent<T>>;
 type FormEventHandler<T = Element> = EventHandler<FormEvent<T>>;
 type ChangeEventHandler<T = Element> = EventHandler<ChangeEvent<T>>;
 type KeyboardEventHandler<T = Element> = EventHandler<KeyboardEvent<T>>;
 type MouseEventHandler<T = Element> = EventHandler<MouseEvent<T>>;
 type TouchEventHandler<T = Element> = EventHandler<TouchEvent<T>>;
 type PointerEventHandler<T = Element> = EventHandler<PointerEvent<T>>;
 type UIEventHandler<T = Element> = EventHandler<UIEvent<T>>;
 type WheelEventHandler<T = Element> = EventHandler<WheelEvent<T>>;
 type AnimationEventHandler<T = Element> = EventHandler<AnimationEvent<T>>;
 type TransitionEventHandler<T = Element> = EventHandler<TransitionEvent<T>>;

//
    // Props / DOM Attributes
    // ----------------------------------------------------------------------

/**
 * @deprecated. This was used to allow clients to pass `ref` and `key`
 * to `createElement`, which is no longer necessary due to intersection
 * types. If you need to declare a props object before passing it to
 * `createElement` or a factory, use `ClassAttributes<T>`:
 *
 * ```ts
 * var b: Button | null;
 * var props: ButtonProps & ClassAttributes<Button> = {
 * ref: b => button = b, // ok!
 * label: "I'm a Button"
 * };
 * ```
 */
 interface Props<T> {
 children?: ReactNode | undefined;
 key?: Key | undefined;
 ref?: LegacyRef<T> | undefined;
 }

interface HTMLProps<T> extends AllHTMLAttributes<T>, ClassAttributes<T> {
 }

type DetailedHTMLProps<E extends HTMLAttributes<T>, T> = ClassAttributes<T> & E;

interface SVGProps<T> extends SVGAttributes<T>, ClassAttributes<T> {
 }

interface DOMAttributes<T> {
 children?: ReactNode | undefined;
 dangerouslySetInnerHTML?: {
 __html: string;
 } | undefined;

// Clipboard Events
 onCopy?: ClipboardEventHandler<T> | undefined;
 onCopyCapture?: ClipboardEventHandler<T> | undefined;
 onCut?: ClipboardEventHandler<T> | undefined;
 onCutCapture?: ClipboardEventHandler<T> | undefined;
 onPaste?: ClipboardEventHandler<T> | undefined;
 onPasteCapture?: ClipboardEventHandler<T> | undefined;

// Composition Events
 onCompositionEnd?: CompositionEventHandler<T> | undefined;
 onCompositionEndCapture?: CompositionEventHandler<T> | undefined;
 onCompositionStart?: CompositionEventHandler<T> | undefined;
 onCompositionStartCapture?: CompositionEventHandler<T> | undefined;
 onCompositionUpdate?: CompositionEventHandler<T> | undefined;
 onCompositionUpdateCapture?: CompositionEventHandler<T> | undefined;

// Focus Events
 onFocus?: FocusEventHandler<T> | undefined;
 onFocusCapture?: FocusEventHandler<T> | undefined;
 onBlur?: FocusEventHandler<T> | undefined;
 onBlurCapture?: FocusEventHandler<T> | undefined;

// Form Events
 onChange?: FormEventHandler<T> | undefined;
 onChangeCapture?: FormEventHandler<T> | undefined;
 onBeforeInput?: FormEventHandler<T> | undefined;
 onBeforeInputCapture?: FormEventHandler<T> | undefined;
 onInput?: FormEventHandler<T> | undefined;
 onInputCapture?: FormEventHandler<T> | undefined;
 onReset?: FormEventHandler<T> | undefined;
 onResetCapture?: FormEventHandler<T> | undefined;
 onSubmit?: FormEventHandler<T> | undefined;
 onSubmitCapture?: FormEventHandler<T> | undefined;
 onInvalid?: FormEventHandler<T> | undefined;
 onInvalidCapture?: FormEventHandler<T> | undefined;

// Image Events
 onLoad?: ReactEventHandler<T> | undefined;
 onLoadCapture?: ReactEventHandler<T> | undefined;
 onError?: ReactEventHandler<T> | undefined; // also a Media Event
 onErrorCapture?: ReactEventHandler<T> | undefined; // also a Media Event

// Keyboard Events
 onKeyDown?: KeyboardEventHandler<T> | undefined;
 onKeyDownCapture?: KeyboardEventHandler<T> | undefined;
 onKeyPress?: KeyboardEventHandler<T> | undefined;
 onKeyPressCapture?: KeyboardEventHandler<T> | undefined;
 onKeyUp?: KeyboardEventHandler<T> | undefined;
 onKeyUpCapture?: KeyboardEventHandler<T> | undefined;

// Media Events
 onAbort?: ReactEventHandler<T> | undefined;
 onAbortCapture?: ReactEventHandler<T> | undefined;
 onCanPlay?: ReactEventHandler<T> | undefined;
 onCanPlayCapture?: ReactEventHandler<T> | undefined;
 onCanPlayThrough?: ReactEventHandler<T> | undefined;
 onCanPlayThroughCapture?: ReactEventHandler<T> | undefined;
 onDurationChange?: ReactEventHandler<T> | undefined;
 onDurationChangeCapture?: ReactEventHandler<T> | undefined;
 onEmptied?: ReactEventHandler<T> | undefined;
 onEmptiedCapture?: ReactEventHandler<T> | undefined;
 onEncrypted?: ReactEventHandler<T> | undefined;
 onEncryptedCapture?: ReactEventHandler<T> | undefined;
 onEnded?: ReactEventHandler<T> | undefined;
 onEndedCapture?: ReactEventHandler<T> | undefined;
 onLoadedData?: ReactEventHandler<T> | undefined;
 onLoadedDataCapture?: ReactEventHandler<T> | undefined;
 onLoadedMetadata?: ReactEventHandler<T> | undefined;
 onLoadedMetadataCapture?: ReactEventHandler<T> | undefined;
 onLoadStart?: ReactEventHandler<T> | undefined;
 onLoadStartCapture?: ReactEventHandler<T> | undefined;
 onPause?: ReactEventHandler<T> | undefined;
 onPauseCapture?: ReactEventHandler<T> | undefined;
 onPlay?: ReactEventHandler<T> | undefined;
 onPlayCapture?: ReactEventHandler<T> | undefined;
 onPlaying?: ReactEventHandler<T> | undefined;
 onPlayingCapture?: ReactEventHandler<T> | undefined;
 onProgress?: ReactEventHandler<T> | undefined;
 onProgressCapture?: ReactEventHandler<T> | undefined;
 onRateChange?: ReactEventHandler<T> | undefined;
 onRateChangeCapture?: ReactEventHandler<T> | undefined;
 onSeeked?: ReactEventHandler<T> | undefined;
 onSeekedCapture?: ReactEventHandler<T> | undefined;
 onSeeking?: ReactEventHandler<T> | undefined;
 onSeekingCapture?: ReactEventHandler<T> | undefined;
 onStalled?: ReactEventHandler<T> | undefined;
 onStalledCapture?: ReactEventHandler<T> | undefined;
 onSuspend?: ReactEventHandler<T> | undefined;
 onSuspendCapture?: ReactEventHandler<T> | undefined;
 onTimeUpdate?: ReactEventHandler<T> | undefined;
 onTimeUpdateCapture?: ReactEventHandler<T> | undefined;
 onVolumeChange?: ReactEventHandler<T> | undefined;
 onVolumeChangeCapture?: ReactEventHandler<T> | undefined;
 onWaiting?: ReactEventHandler<T> | undefined;
 onWaitingCapture?: ReactEventHandler<T> | undefined;

// MouseEvents
 onAuxClick?: MouseEventHandler<T> | undefined;
 onAuxClickCapture?: MouseEventHandler<T> | undefined;
 onClick?: MouseEventHandler<T> | undefined;
 onClickCapture?: MouseEventHandler<T> | undefined;
 onContextMenu?: MouseEventHandler<T> | undefined;
 onContextMenuCapture?: MouseEventHandler<T> | undefined;
 onDoubleClick?: MouseEventHandler<T> | undefined;
 onDoubleClickCapture?: MouseEventHandler<T> | undefined;
 onDrag?: DragEventHandler<T> | undefined;
 onDragCapture?: DragEventHandler<T> | undefined;
 onDragEnd?: DragEventHandler<T> | undefined;
 onDragEndCapture?: DragEventHandler<T> | undefined;
 onDragEnter?: DragEventHandler<T> | undefined;
 onDragEnterCapture?: DragEventHandler<T> | undefined;
 onDragExit?: DragEventHandler<T> | undefined;
 onDragExitCapture?: DragEventHandler<T> | undefined;
 onDragLeave?: DragEventHandler<T> | undefined;
 onDragLeaveCapture?: DragEventHandler<T> | undefined;
 onDragOver?: DragEventHandler<T> | undefined;
 onDragOverCapture?: DragEventHandler<T> | undefined;
 onDragStart?: DragEventHandler<T> | undefined;
 onDragStartCapture?: DragEventHandler<T> | undefined;
 onDrop?: DragEventHandler<T> | undefined;
 onDropCapture?: DragEventHandler<T> | undefined;
 onMouseDown?: MouseEventHandler<T> | undefined;
 onMouseDownCapture?: MouseEventHandler<T> | undefined;
 onMouseEnter?: MouseEventHandler<T> | undefined;
 onMouseLeave?: MouseEventHandler<T> | undefined;
 onMouseMove?: MouseEventHandler<T> | undefined;
 onMouseMoveCapture?: MouseEventHandler<T> | undefined;
 onMouseOut?: MouseEventHandler<T> | undefined;
 onMouseOutCapture?: MouseEventHandler<T> | undefined;
 onMouseOver?: MouseEventHandler<T> | undefined;
 onMouseOverCapture?: MouseEventHandler<T> | undefined;
 onMouseUp?: MouseEventHandler<T> | undefined;
 onMouseUpCapture?: MouseEventHandler<T> | undefined;

// Selection Events
 onSelect?: ReactEventHandler<T> | undefined;
 onSelectCapture?: ReactEventHandler<T> | undefined;

// Touch Events
 onTouchCancel?: TouchEventHandler<T> | undefined;
 onTouchCancelCapture?: TouchEventHandler<T> | undefined;
 onTouchEnd?: TouchEventHandler<T> | undefined;
 onTouchEndCapture?: TouchEventHandler<T> | undefined;
 onTouchMove?: TouchEventHandler<T> | undefined;
 onTouchMoveCapture?: TouchEventHandler<T> | undefined;
 onTouchStart?: TouchEventHandler<T> | undefined;
 onTouchStartCapture?: TouchEventHandler<T> | undefined;

// Pointer Events
 onPointerDown?: PointerEventHandler<T> | undefined;
 onPointerDownCapture?: PointerEventHandler<T> | undefined;
 onPointerMove?: PointerEventHandler<T> | undefined;
 onPointerMoveCapture?: PointerEventHandler<T> | undefined;
 onPointerUp?: PointerEventHandler<T> | undefined;
 onPointerUpCapture?: PointerEventHandler<T> | undefined;
 onPointerCancel?: PointerEventHandler<T> | undefined;
 onPointerCancelCapture?: PointerEventHandler<T> | undefined;
 onPointerEnter?: PointerEventHandler<T> | undefined;
 onPointerEnterCapture?: PointerEventHandler<T> | undefined;
 onPointerLeave?: PointerEventHandler<T> | undefined;
 onPointerLeaveCapture?: PointerEventHandler<T> | undefined;
 onPointerOver?: PointerEventHandler<T> | undefined;
 onPointerOverCapture?: PointerEventHandler<T> | undefined;
 onPointerOut?: PointerEventHandler<T> | undefined;
 onPointerOutCapture?: PointerEventHandler<T> | undefined;
 onGotPointerCapture?: PointerEventHandler<T> | undefined;
 onGotPointerCaptureCapture?: PointerEventHandler<T> | undefined;
 onLostPointerCapture?: PointerEventHandler<T> | undefined;
 onLostPointerCaptureCapture?: PointerEventHandler<T> | undefined;

// UI Events
 onScroll?: UIEventHandler<T> | undefined;
 onScrollCapture?: UIEventHandler<T> | undefined;

// Wheel Events
 onWheel?: WheelEventHandler<T> | undefined;
 onWheelCapture?: WheelEventHandler<T> | undefined;

// Animation Events
 onAnimationStart?: AnimationEventHandler<T> | undefined;
 onAnimationStartCapture?: AnimationEventHandler<T> | undefined;
 onAnimationEnd?: AnimationEventHandler<T> | undefined;
 onAnimationEndCapture?: AnimationEventHandler<T> | undefined;
 onAnimationIteration?: AnimationEventHandler<T> | undefined;
 onAnimationIterationCapture?: AnimationEventHandler<T> | undefined;

// Transition Events
 onTransitionEnd?: TransitionEventHandler<T> | undefined;
 onTransitionEndCapture?: TransitionEventHandler<T> | undefined;
 }

export interface CSSProperties extends CSS.Properties<string | number> {
 /**
 * The index signature was removed to enable closed typing for style
 * using CSSType. You're able to use type assertion or module augmentation
 * to add properties or an index signature of your own.
 *
 * For examples and more information, visit:
 * https://github.com/frenic/csstype#what-should-i-do-when-i-get-type-errors
 */
 }

// All the WAI-ARIA 1.1 attributes from https://www.w3.org/TR/wai-aria-1.1/
    interface AriaAttributes {
        /** Identifies the currently active element when DOM focus is on a composite widget, textbox, group, or application. */
        'aria-activedescendant'?: string | undefined;
        /** Indicates whether assistive technologies will present all, or only parts of, the changed region based on the change notifications defined by the aria-relevant attribute. */
        'aria-atomic'?: Booleanish | undefined;
        /**
         * Indicates whether inputting text could trigger display of one or more predictions of the user's intended value for an input and specifies how predictions would be
         * presented if they are made.
         */
        'aria-autocomplete'?: 'none' | 'inline' | 'list' | 'both' | undefined;
        /** Indicates an element is being modified and that assistive technologies MAY want to wait until the modifications are complete before exposing them to the user. */
        'aria-busy'?: Booleanish | undefined;
        /**
         * Indicates the current "checked" state of checkboxes, radio buttons, and other widgets.
         * @see aria-pressed @see aria-selected.
         */
        'aria-checked'?: boolean | 'false' | 'mixed' | 'true' | undefined;
        /**
         * Defines the total number of columns in a table, grid, or treegrid.
         * @see aria-colindex.
         */
        'aria-colcount'?: number | undefined;
        /**
         * Defines an element's column index or position with respect to the total number of columns within a table, grid, or treegrid.
         * @see aria-colcount @see aria-colspan.
         */
        'aria-colindex'?: number | undefined;
        /**
         * Defines the number of columns spanned by a cell or gridcell within a table, grid, or treegrid.
         * @see aria-colindex @see aria-rowspan.
         */
        'aria-colspan'?: number | undefined;
        /**
         * Identifies the element (or elements) whose contents or presence are controlled by the current element.
         * @see aria-owns.
         */
        'aria-controls'?: string | undefined;
        /** Indicates the element that represents the current item within a container or set of related elements. */
        'aria-current'?: boolean | 'false' | 'true' | 'page' | 'step' | 'location' | 'date' | 'time' | undefined;
        /**
         * Identifies the element (or elements) that describes the object.
         * @see aria-labelledby
         */
        'aria-describedby'?: string | undefined;
        /**
         * Identifies the element that provides a detailed, extended description for the object.
         * @see aria-describedby.
         */
        'aria-details'?: string | undefined;
        /**
         * Indicates that the element is perceivable but disabled, so it is not editable or otherwise operable.
         * @see aria-hidden @see aria-readonly.
         */
        'aria-disabled'?: Booleanish | undefined;
        /**
         * Indicates what functions can be performed when a dragged object is released on the drop target.
         * @deprecated in ARIA 1.1
         */
        'aria-dropeffect'?: 'none' | 'copy' | 'execute' | 'link' | 'move' | 'popup' | undefined;
        /**
         * Identifies the element that provides an error message for the object.
         * @see aria-invalid @see aria-describedby.
         */
        'aria-errormessage'?: string | undefined;
        /** Indicates whether the element, or another grouping element it controls, is currently expanded or collapsed. */
        'aria-expanded'?: Booleanish | undefined;
        /**
         * Identifies the next element (or elements) in an alternate reading order of content which, at the user's discretion,
         * allows assistive technology to override the general default of reading in document source order.
         */
        'aria-flowto'?: string | undefined;
        /**
         * Indicates an element's "grabbed" state in a drag-and-drop operation.
         * @deprecated in ARIA 1.1
         */
        'aria-grabbed'?: Booleanish | undefined;
        /** Indicates the availability and type of interactive popup element, such as menu or dialog, that can be triggered by an element. */
        'aria-haspopup'?: boolean | 'false' | 'true' | 'menu' | 'listbox' | 'tree' | 'grid' | 'dialog' | undefined;
        /**
         * Indicates whether the element is exposed to an accessibility API.
         * @see aria-disabled.
         */
        'aria-hidden'?: Booleanish | undefined;
        /**
         * Indicates the entered value does not conform to the format expected by the application.
         * @see aria-errormessage.
         */
        'aria-invalid'?: boolean | 'false' | 'true' | 'grammar' | 'spelling' | undefined;
        /** Indicates keyboard shortcuts that an author has implemented to activate or give focus to an element. */
        'aria-keyshortcuts'?: string | undefined;
        /**
         * Defines a string value that labels the current element.
         * @see aria-labelledby.
         */
        'aria-label'?: string | undefined;
        /**
         * Identifies the element (or elements) that labels the current element.
         * @see aria-describedby.
         */
        'aria-labelledby'?: string | undefined;
        /** Defines the hierarchical level of an element within a structure. */
        'aria-level'?: number | undefined;
        /** Indicates that an element will be updated, and describes the types of updates the user agents, assistive technologies, and user can expect from the live region. */
        'aria-live'?: 'off' | 'assertive' | 'polite' | undefined;
        /** Indicates whether an element is modal when displayed. */
        'aria-modal'?: Booleanish | undefined;
        /** Indicates whether a text box accepts multiple lines of input or only a single line. */
        'aria-multiline'?: Booleanish | undefined;
        /** Indicates that the user may select more than one item from the current selectable descendants. */
        'aria-multiselectable'?: Booleanish | undefined;
        /** Indicates whether the element's orientation is horizontal, vertical, or unknown/ambiguous. */
        'aria-orientation'?: 'horizontal' | 'vertical' | undefined;
        /**
         * Identifies an element (or elements) in order to define a visual, functional, or contextual parent/child relationship
         * between DOM elements where the DOM hierarchy cannot be used to represent the relationship.
         * @see aria-controls.
         */
        'aria-owns'?: string | undefined;
        /**
         * Defines a short hint (a word or short phrase) intended to aid the user with data entry when the control has no value.
         * A hint could be a sample value or a brief description of the expected format.
         */
        'aria-placeholder'?: string | undefined;
        /**
         * Defines an element's number or position in the current set of listitems or treeitems. Not required if all elements in the set are present in the DOM.
         * @see aria-setsize.
         */
        'aria-posinset'?: number | undefined;
        /**
         * Indicates the current "pressed" state of toggle buttons.
         * @see aria-checked @see aria-selected.
         */
        'aria-pressed'?: boolean | 'false' | 'mixed' | 'true' | undefined;
        /**
         * Indicates that the element is not editable, but is otherwise operable.
         * @see aria-disabled.
         */
        'aria-readonly'?: Booleanish | undefined;
        /**
         * Indicates what notifications the user agent will trigger when the accessibility tree within a live region is modified.
         * @see aria-atomic.
         */
        'aria-relevant'?: 'additions' | 'additions removals' | 'additions text' | 'all' | 'removals' | 'removals additions' | 'removals text' | 'text' | 'text additions' | 'text removals' | undefined;
        /** Indicates that user input is required on the element before a form may be submitted. */
        'aria-required'?: Booleanish | undefined;
        /** Defines a human-readable, author-localized description for the role of an element. */
        'aria-roledescription'?: string | undefined;
        /**
         * Defines the total number of rows in a table, grid, or treegrid.
         * @see aria-rowindex.
         */
        'aria-rowcount'?: number | undefined;
        /**
         * Defines an element's row index or position with respect to the total number of rows within a table, grid, or treegrid.
         * @see aria-rowcount @see aria-rowspan.
         */
        'aria-rowindex'?: number | undefined;
        /**
         * Defines the number of rows spanned by a cell or gridcell within a table, grid, or treegrid.
         * @see aria-rowindex @see aria-colspan.
         */
        'aria-rowspan'?: number | undefined;
        /**
         * Indicates the current "selected" state of various widgets.
         * @see aria-checked @see aria-pressed.
         */
        'aria-selected'?: Booleanish | undefined;
        /**
         * Defines the number of items in the current set of listitems or treeitems. Not required if all elements in the set are present in the DOM.
         * @see aria-posinset.
         */
        'aria-setsize'?: number | undefined;
        /** Indicates if items in a table or grid are sorted in ascending or descending order. */
        'aria-sort'?: 'none' | 'ascending' | 'descending' | 'other' | undefined;
        /** Defines the maximum allowed value for a range widget. */
        'aria-valuemax'?: number | undefined;
        /** Defines the minimum allowed value for a range widget. */
        'aria-valuemin'?: number | undefined;
        /**
         * Defines the current value for a range widget.
         * @see aria-valuetext.
         */
        'aria-valuenow'?: number | undefined;
        /** Defines the human readable text alternative of aria-valuenow for a range widget. */
        'aria-valuetext'?: string | undefined;
    }

// All the WAI-ARIA 1.1 role attribute values from https://www.w3.org/TR/wai-aria-1.1/#role_definitions
    type AriaRole =
        | 'alert'
        | 'alertdialog'
        | 'application'
        | 'article'
        | 'banner'
        | 'button'
        | 'cell'
        | 'checkbox'
        | 'columnheader'
        | 'combobox'
        | 'complementary'
        | 'contentinfo'
        | 'definition'
        | 'dialog'
        | 'directory'
        | 'document'
        | 'feed'
        | 'figure'
        | 'form'
        | 'grid'
        | 'gridcell'
        | 'group'
        | 'heading'
        | 'img'
        | 'link'
        | 'list'
        | 'listbox'
        | 'listitem'
        | 'log'
        | 'main'
        | 'marquee'
        | 'math'
        | 'menu'
        | 'menubar'
        | 'menuitem'
        | 'menuitemcheckbox'
        | 'menuitemradio'
        | 'navigation'
        | 'none'
        | 'note'
        | 'option'
        | 'presentation'
        | 'progressbar'
        | 'radio'
        | 'radiogroup'
        | 'region'
        | 'row'
        | 'rowgroup'
        | 'rowheader'
        | 'scrollbar'
        | 'search'
        | 'searchbox'
        | 'separator'
        | 'slider'
        | 'spinbutton'
        | 'status'
        | 'switch'
        | 'tab'
        | 'table'
        | 'tablist'
        | 'tabpanel'
        | 'term'
        | 'textbox'
        | 'timer'
        | 'toolbar'
        | 'tooltip'
        | 'tree'
        | 'treegrid'
        | 'treeitem'
        | (string & {});

interface HTMLAttributes<T> extends AriaAttributes, DOMAttributes<T> {
 // React-specific Attributes
 defaultChecked?: boolean | undefined;
 defaultValue?: string | number | ReadonlyArray<string> | undefined;
 suppressContentEditableWarning?: boolean | undefined;
 suppressHydrationWarning?: boolean | undefined;

// Unknown
 radioGroup?: string | undefined; // <command>, <menuitem>

// WAI-ARIA
        role?: AriaRole | undefined;

// Living Standard
        /**
         * Hints at the type of data that might be entered by the user while editing the element or its contents
         * @see https://html.spec.whatwg.org/multipage/interaction.html#input-modalities:-the-inputmode-attribute
         */
        inputMode?: 'none' | 'text' | 'tel' | 'url' | 'email' | 'numeric' | 'decimal' | 'search' | undefined;
        /**
         * Specify that a standard HTML element should behave like a defined custom built-in element
         * @see https://html.spec.whatwg.org/multipage/custom-elements.html#attr-is
         */
        is?: string | undefined;
    }

interface AllHTMLAttributes<T> extends HTMLAttributes<T> {
 // Standard HTML Attributes
 accept?: string | undefined;
 acceptCharset?: string | undefined;
 action?: string | undefined;
 allowFullScreen?: boolean | undefined;
 allowTransparency?: boolean | undefined;
 alt?: string | undefined;
 as?: string | undefined;
 async?: boolean | undefined;
 autoComplete?: string | undefined;
 autoFocus?: boolean | undefined;
 autoPlay?: boolean | undefined;
 capture?: boolean | 'user' | 'environment' | undefined;
 cellPadding?: number | string | undefined;
 cellSpacing?: number | string | undefined;
 charSet?: string | undefined;
 challenge?: string | undefined;
 checked?: boolean | undefined;
 cite?: string | undefined;
 classID?: string | undefined;
 cols?: number | undefined;
 colSpan?: number | undefined;
 content?: string | undefined;
 controls?: boolean | undefined;
 coords?: string | undefined;
 crossOrigin?: string | undefined;
 data?: string | undefined;
 dateTime?: string | undefined;
 default?: boolean | undefined;
 defer?: boolean | undefined;
 disabled?: boolean | undefined;
 download?: any;
 encType?: string | undefined;
 form?: string | undefined;
 formAction?: string | undefined;
 formEncType?: string | undefined;
 formMethod?: string | undefined;
 formNoValidate?: boolean | undefined;
 formTarget?: string | undefined;
 frameBorder?: number | string | undefined;
 headers?: string | undefined;
 height?: number | string | undefined;
 high?: number | undefined;
 href?: string | undefined;
 hrefLang?: string | undefined;
 htmlFor?: string | undefined;
 httpEquiv?: string | undefined;
 integrity?: string | undefined;
 keyParams?: string | undefined;
 keyType?: string | undefined;
 kind?: string | undefined;
 label?: string | undefined;
 list?: string | undefined;
 loop?: boolean | undefined;
 low?: number | undefined;
 manifest?: string | undefined;
 marginHeight?: number | undefined;
 marginWidth?: number | undefined;
 max?: number | string | undefined;
 maxLength?: number | undefined;
 media?: string | undefined;
 mediaGroup?: string | undefined;
 method?: string | undefined;
 min?: number | string | undefined;
 minLength?: number | undefined;
 multiple?: boolean | undefined;
 muted?: boolean | undefined;
 name?: string | undefined;
 nonce?: string | undefined;
 noValidate?: boolean | undefined;
 open?: boolean | undefined;
 optimum?: number | undefined;
 pattern?: string | undefined;
 placeholder?: string | undefined;
 playsInline?: boolean | undefined;
 poster?: string | undefined;
 preload?: string | undefined;
 readOnly?: boolean | undefined;
 rel?: string | undefined;
 required?: boolean | undefined;
 reversed?: boolean | undefined;
 rows?: number | undefined;
 rowSpan?: number | undefined;
 sandbox?: string | undefined;
 scope?: string | undefined;
 scoped?: boolean | undefined;
 scrolling?: string | undefined;
 seamless?: boolean | undefined;
 selected?: boolean | undefined;
 shape?: string | undefined;
 size?: number | undefined;
 sizes?: string | undefined;
 span?: number | undefined;
 src?: string | undefined;
 srcDoc?: string | undefined;
 srcLang?: string | undefined;
 srcSet?: string | undefined;
 start?: number | undefined;
 step?: number | string | undefined;
 summary?: string | undefined;
 target?: string | undefined;
 type?: string | undefined;
 useMap?: string | undefined;
 value?: string | ReadonlyArray<string> | number | undefined;
 width?: number | string | undefined;
 wmode?: string | undefined;
 wrap?: string | undefined;
 }

type HTMLAttributeAnchorTarget =
        | '_self'
        | '_blank'
        | '_parent'
        | '_top'
        | (string & {});

interface AnchorHTMLAttributes<T> extends HTMLAttributes<T> {
 download?: any;
 href?: string | undefined;
 hrefLang?: string | undefined;
 media?: string | undefined;
 ping?: string | undefined;
 rel?: string | undefined;
 target?: HTMLAttributeAnchorTarget | undefined;
 type?: string | undefined;
 referrerPolicy?: HTMLAttributeReferrerPolicy | undefined;
 }

interface AudioHTMLAttributes<T> extends MediaHTMLAttributes<T> {}

interface AreaHTMLAttributes<T> extends HTMLAttributes<T> {
 alt?: string | undefined;
 coords?: string | undefined;
 download?: any;
 href?: string | undefined;
 hrefLang?: string | undefined;
 media?: string | undefined;
 referrerPolicy?: HTMLAttributeReferrerPolicy | undefined;
 rel?: string | undefined;
 shape?: string | undefined;
 target?: string | undefined;
 }

interface BaseHTMLAttributes<T> extends HTMLAttributes<T> {
 href?: string | undefined;
 target?: string | undefined;
 }

interface BlockquoteHTMLAttributes<T> extends HTMLAttributes<T> {
 cite?: string | undefined;
 }

interface ButtonHTMLAttributes<T> extends HTMLAttributes<T> {
 autoFocus?: boolean | undefined;
 disabled?: boolean | undefined;
 form?: string | undefined;
 formAction?: string | undefined;
 formEncType?: string | undefined;
 formMethod?: string | undefined;
 formNoValidate?: boolean | undefined;
 formTarget?: string | undefined;
 name?: string | undefined;
 type?: 'submit' | 'reset' | 'button' | undefined;
 value?: string | ReadonlyArray<string> | number | undefined;
 }

interface CanvasHTMLAttributes<T> extends HTMLAttributes<T> {
 height?: number | string | undefined;
 width?: number | string | undefined;
 }

interface ColHTMLAttributes<T> extends HTMLAttributes<T> {
 span?: number | undefined;
 width?: number | string | undefined;
 }

interface ColgroupHTMLAttributes<T> extends HTMLAttributes<T> {
 span?: number | undefined;
 }

interface DataHTMLAttributes<T> extends HTMLAttributes<T> {
 value?: string | ReadonlyArray<string> | number | undefined;
 }

interface DetailsHTMLAttributes<T> extends HTMLAttributes<T> {
 open?: boolean | undefined;
 onToggle?: ReactEventHandler<T> | undefined;
 }

interface DelHTMLAttributes<T> extends HTMLAttributes<T> {
 cite?: string | undefined;
 dateTime?: string | undefined;
 }

interface DialogHTMLAttributes<T> extends HTMLAttributes<T> {
 open?: boolean | undefined;
 }

interface EmbedHTMLAttributes<T> extends HTMLAttributes<T> {
 height?: number | string | undefined;
 src?: string | undefined;
 type?: string | undefined;
 width?: number | string | undefined;
 }

interface FieldsetHTMLAttributes<T> extends HTMLAttributes<T> {
 disabled?: boolean | undefined;
 form?: string | undefined;
 name?: string | undefined;
 }

interface FormHTMLAttributes<T> extends HTMLAttributes<T> {
 acceptCharset?: string | undefined;
 action?: string | undefined;
 autoComplete?: string | undefined;
 encType?: string | undefined;
 method?: string | undefined;
 name?: string | undefined;
 noValidate?: boolean | undefined;
 target?: string | undefined;
 }

interface HtmlHTMLAttributes<T> extends HTMLAttributes<T> {
 manifest?: string | undefined;
 }

interface IframeHTMLAttributes<T> extends HTMLAttributes<T> {
 allow?: string | undefined;
 allowFullScreen?: boolean | undefined;
 allowTransparency?: boolean | undefined;
 /** @deprecated */
 frameBorder?: number | string | undefined;
 height?: number | string | undefined;
 loading?: "eager" | "lazy" | undefined;
 /** @deprecated */
 marginHeight?: number | undefined;
 /** @deprecated */
 marginWidth?: number | undefined;
 name?: string | undefined;
 referrerPolicy?: HTMLAttributeReferrerPolicy | undefined;
 sandbox?: string | undefined;
 /** @deprecated */
 scrolling?: string | undefined;
 seamless?: boolean | undefined;
 src?: string | undefined;
 srcDoc?: string | undefined;
 width?: number | string | undefined;
 }

interface ImgHTMLAttributes<T> extends HTMLAttributes<T> {
 alt?: string | undefined;
 crossOrigin?: "anonymous" | "use-credentials" | "" | undefined;
 decoding?: "async" | "auto" | "sync" | undefined;
 height?: number | string | undefined;
 loading?: "eager" | "lazy" | undefined;
 referrerPolicy?: HTMLAttributeReferrerPolicy | undefined;
 sizes?: string | undefined;
 src?: string | undefined;
 srcSet?: string | undefined;
 useMap?: string | undefined;
 width?: number | string | undefined;
 }

interface InsHTMLAttributes<T> extends HTMLAttributes<T> {
 cite?: string | undefined;
 dateTime?: string | undefined;
 }

type HTMLInputTypeAttribute =
        | 'button'
        | 'checkbox'
        | 'color'
        | 'date'
        | 'datetime-local'
        | 'email'
        | 'file'
        | 'hidden'
        | 'image'
        | 'month'
        | 'number'
        | 'password'
        | 'radio'
        | 'range'
        | 'reset'
        | 'search'
        | 'submit'
        | 'tel'
        | 'text'
        | 'time'
        | 'url'
        | 'week'
        | (string & {});

interface InputHTMLAttributes<T> extends HTMLAttributes<T> {
 accept?: string | undefined;
 alt?: string | undefined;
 autoComplete?: string | undefined;
 autoFocus?: boolean | undefined;
 capture?: boolean | 'user' | 'environment' | undefined; // https://www.w3.org/TR/html-media-capture/#the-capture-attribute
 checked?: boolean | undefined;
 crossOrigin?: string | undefined;
 disabled?: boolean | undefined;
 enterKeyHint?: 'enter' | 'done' | 'go' | 'next' | 'previous' | 'search' | 'send' | undefined;
 form?: string | undefined;
 formAction?: string | undefined;
 formEncType?: string | undefined;
 formMethod?: string | undefined;
 formNoValidate?: boolean | undefined;
 formTarget?: string | undefined;
 height?: number | string | undefined;
 list?: string | undefined;
 max?: number | string | undefined;
 maxLength?: number | undefined;
 min?: number | string | undefined;
 minLength?: number | undefined;
 multiple?: boolean | undefined;
 name?: string | undefined;
 pattern?: string | undefined;
 placeholder?: string | undefined;
 readOnly?: boolean | undefined;
 required?: boolean | undefined;
 size?: number | undefined;
 src?: string | undefined;
 step?: number | string | undefined;
 type?: HTMLInputTypeAttribute | undefined;
 value?: string | ReadonlyArray<string> | number | undefined;
 width?: number | string | undefined;

onChange?: ChangeEventHandler<T> | undefined;
 }

interface KeygenHTMLAttributes<T> extends HTMLAttributes<T> {
 autoFocus?: boolean | undefined;
 challenge?: string | undefined;
 disabled?: boolean | undefined;
 form?: string | undefined;
 keyType?: string | undefined;
 keyParams?: string | undefined;
 name?: string | undefined;
 }

interface LabelHTMLAttributes<T> extends HTMLAttributes<T> {
 form?: string | undefined;
 htmlFor?: string | undefined;
 }

interface LiHTMLAttributes<T> extends HTMLAttributes<T> {
 value?: string | ReadonlyArray<string> | number | undefined;
 }

interface LinkHTMLAttributes<T> extends HTMLAttributes<T> {
 as?: string | undefined;
 crossOrigin?: string | undefined;
 href?: string | undefined;
 hrefLang?: string | undefined;
 integrity?: string | undefined;
 media?: string | undefined;
 imageSrcSet?: string | undefined;
 referrerPolicy?: HTMLAttributeReferrerPolicy | undefined;
 rel?: string | undefined;
 sizes?: string | undefined;
 type?: string | undefined;
 charSet?: string | undefined;
 }

interface MapHTMLAttributes<T> extends HTMLAttributes<T> {
 name?: string | undefined;
 }

interface MenuHTMLAttributes<T> extends HTMLAttributes<T> {
 type?: string | undefined;
 }

interface MediaHTMLAttributes<T> extends HTMLAttributes<T> {
 autoPlay?: boolean | undefined;
 controls?: boolean | undefined;
 controlsList?: string | undefined;
 crossOrigin?: string | undefined;
 loop?: boolean | undefined;
 mediaGroup?: string | undefined;
 muted?: boolean | undefined;
 playsInline?: boolean | undefined;
 preload?: string | undefined;
 src?: string | undefined;
 }

interface MetaHTMLAttributes<T> extends HTMLAttributes<T> {
 charSet?: string | undefined;
 content?: string | undefined;
 httpEquiv?: string | undefined;
 name?: string | undefined;
 media?: string | undefined;
 }

interface MeterHTMLAttributes<T> extends HTMLAttributes<T> {
 form?: string | undefined;
 high?: number | undefined;
 low?: number | undefined;
 max?: number | string | undefined;
 min?: number | string | undefined;
 optimum?: number | undefined;
 value?: string | ReadonlyArray<string> | number | undefined;
 }

interface QuoteHTMLAttributes<T> extends HTMLAttributes<T> {
 cite?: string | undefined;
 }

interface ObjectHTMLAttributes<T> extends HTMLAttributes<T> {
 classID?: string | undefined;
 data?: string | undefined;
 form?: string | undefined;
 height?: number | string | undefined;
 name?: string | undefined;
 type?: string | undefined;
 useMap?: string | undefined;
 width?: number | string | undefined;
 wmode?: string | undefined;
 }

interface OlHTMLAttributes<T> extends HTMLAttributes<T> {
 reversed?: boolean | undefined;
 start?: number | undefined;
 type?: '1' | 'a' | 'A' | 'i' | 'I' | undefined;
 }

interface OptgroupHTMLAttributes<T> extends HTMLAttributes<T> {
 disabled?: boolean | undefined;
 label?: string | undefined;
 }

interface OptionHTMLAttributes<T> extends HTMLAttributes<T> {
 disabled?: boolean | undefined;
 label?: string | undefined;
 selected?: boolean | undefined;
 value?: string | ReadonlyArray<string> | number | undefined;
 }

interface OutputHTMLAttributes<T> extends HTMLAttributes<T> {
 form?: string | undefined;
 htmlFor?: string | undefined;
 name?: string | undefined;
 }

interface ParamHTMLAttributes<T> extends HTMLAttributes<T> {
 name?: string | undefined;
 value?: string | ReadonlyArray<string> | number | undefined;
 }

interface ProgressHTMLAttributes<T> extends HTMLAttributes<T> {
 max?: number | string | undefined;
 value?: string | ReadonlyArray<string> | number | undefined;
 }

interface SlotHTMLAttributes<T> extends HTMLAttributes<T> {
 name?: string | undefined;
 }

interface ScriptHTMLAttributes<T> extends HTMLAttributes<T> {
 async?: boolean | undefined;
 /** @deprecated */
 charSet?: string | undefined;
 crossOrigin?: string | undefined;
 defer?: boolean | undefined;
 integrity?: string | undefined;
 noModule?: boolean | undefined;
 nonce?: string | undefined;
 referrerPolicy?: HTMLAttributeReferrerPolicy | undefined;
 src?: string | undefined;
 type?: string | undefined;
 }

interface SelectHTMLAttributes<T> extends HTMLAttributes<T> {
 autoComplete?: string | undefined;
 autoFocus?: boolean | undefined;
 disabled?: boolean | undefined;
 form?: string | undefined;
 multiple?: boolean | undefined;
 name?: string | undefined;
 required?: boolean | undefined;
 size?: number | undefined;
 value?: string | ReadonlyArray<string> | number | undefined;
 onChange?: ChangeEventHandler<T> | undefined;
 }

interface SourceHTMLAttributes<T> extends HTMLAttributes<T> {
 height?: number | string | undefined;
 media?: string | undefined;
 sizes?: string | undefined;
 src?: string | undefined;
 srcSet?: string | undefined;
 type?: string | undefined;
 width?: number | string | undefined;
 }

interface StyleHTMLAttributes<T> extends HTMLAttributes<T> {
 media?: string | undefined;
 nonce?: string | undefined;
 scoped?: boolean | undefined;
 type?: string | undefined;
 }

interface TableHTMLAttributes<T> extends HTMLAttributes<T> {
 cellPadding?: number | string | undefined;
 cellSpacing?: number | string | undefined;
 summary?: string | undefined;
 width?: number | string | undefined;
 }

interface TextareaHTMLAttributes<T> extends HTMLAttributes<T> {
 autoComplete?: string | undefined;
 autoFocus?: boolean | undefined;
 cols?: number | undefined;
 dirName?: string | undefined;
 disabled?: boolean | undefined;
 form?: string | undefined;
 maxLength?: number | undefined;
 minLength?: number | undefined;
 name?: string | undefined;
 placeholder?: string | undefined;
 readOnly?: boolean | undefined;
 required?: boolean | undefined;
 rows?: number | undefined;
 value?: string | ReadonlyArray<string> | number | undefined;
 wrap?: string | undefined;

onChange?: ChangeEventHandler<T> | undefined;
 }

interface TdHTMLAttributes<T> extends HTMLAttributes<T> {
 align?: "left" | "center" | "right" | "justify" | "char" | undefined;
 colSpan?: number | undefined;
 headers?: string | undefined;
 rowSpan?: number | undefined;
 scope?: string | undefined;
 abbr?: string | undefined;
 height?: number | string | undefined;
 width?: number | string | undefined;
 valign?: "top" | "middle" | "bottom" | "baseline" | undefined;
 }

interface ThHTMLAttributes<T> extends HTMLAttributes<T> {
 align?: "left" | "center" | "right" | "justify" | "char" | undefined;
 colSpan?: number | undefined;
 headers?: string | undefined;
 rowSpan?: number | undefined;
 scope?: string | undefined;
 abbr?: string | undefined;
 }

interface TimeHTMLAttributes<T> extends HTMLAttributes<T> {
 dateTime?: string | undefined;
 }

interface TrackHTMLAttributes<T> extends HTMLAttributes<T> {
 default?: boolean | undefined;
 kind?: string | undefined;
 label?: string | undefined;
 src?: string | undefined;
 srcLang?: string | undefined;
 }

interface VideoHTMLAttributes<T> extends MediaHTMLAttributes<T> {
 height?: number | string | undefined;
 playsInline?: boolean | undefined;
 poster?: string | undefined;
 width?: number | string | undefined;
 disablePictureInPicture?: boolean | undefined;
 disableRemotePlayback?: boolean | undefined;
 }

// this list is "complete" in that it contains every SVG attribute
 // that React supports, but the types can be improved.
 // Full list here: https://facebook.github.io/react/docs/dom-elements.html
 //
 // The three broad type categories are (in order of restrictiveness):
 // - "number | string"
 // - "string"
 // - union of string literals
 interface SVGAttributes<T> extends AriaAttributes, DOMAttributes<T> {
 // Attributes which also defined in HTMLAttributes
 // See comment in SVGDOMPropertyConfig.js
 className?: string | undefined;
 color?: string | undefined;
 height?: number | string | undefined;
 id?: string | undefined;
 lang?: string | undefined;
 max?: number | string | undefined;
 media?: string | undefined;
 method?: string | undefined;
 min?: number | string | undefined;
 name?: string | undefined;
 style?: CSSProperties | undefined;
 target?: string | undefined;
 type?: string | undefined;
 width?: number | string | undefined;

// SVG Specific attributes
        accentHeight?: number | string | undefined;
        accumulate?: "none" | "sum" | undefined;
        additive?: "replace" | "sum" | undefined;
        alignmentBaseline?: "auto" | "baseline" | "before-edge" | "text-before-edge" | "middle" | "central" | "after-edge" |
        "text-after-edge" | "ideographic" | "alphabetic" | "hanging" | "mathematical" | "inherit" | undefined;
        allowReorder?: "no" | "yes" | undefined;
        alphabetic?: number | string | undefined;
        amplitude?: number | string | undefined;
        arabicForm?: "initial" | "medial" | "terminal" | "isolated" | undefined;
        ascent?: number | string | undefined;
        attributeName?: string | undefined;
        attributeType?: string | undefined;
        autoReverse?: Booleanish | undefined;
        azimuth?: number | string | undefined;
        baseFrequency?: number | string | undefined;
        baselineShift?: number | string | undefined;
        baseProfile?: number | string | undefined;
        bbox?: number | string | undefined;
        begin?: number | string | undefined;
        bias?: number | string | undefined;
        by?: number | string | undefined;
        calcMode?: number | string | undefined;
        capHeight?: number | string | undefined;
        clip?: number | string | undefined;
        clipPath?: string | undefined;
        clipPathUnits?: number | string | undefined;
        clipRule?: number | string | undefined;
        colorInterpolation?: number | string | undefined;
        colorInterpolationFilters?: "auto" | "sRGB" | "linearRGB" | "inherit" | undefined;
        colorProfile?: number | string | undefined;
        colorRendering?: number | string | undefined;
        contentScriptType?: number | string | undefined;
        contentStyleType?: number | string | undefined;
        cursor?: number | string | undefined;
        cx?: number | string | undefined;
        cy?: number | string | undefined;
        d?: string | undefined;
        decelerate?: number | string | undefined;
        descent?: number | string | undefined;
        diffuseConstant?: number | string | undefined;
        direction?: number | string | undefined;
        display?: number | string | undefined;
        divisor?: number | string | undefined;
        dominantBaseline?: number | string | undefined;
        dur?: number | string | undefined;
        dx?: number | string | undefined;
        dy?: number | string | undefined;
        edgeMode?: number | string | undefined;
        elevation?: number | string | undefined;
        enableBackground?: number | string | undefined;
        end?: number | string | undefined;
        exponent?: number | string | undefined;
        externalResourcesRequired?: Booleanish | undefined;
        fill?: string | undefined;
        fillOpacity?: number | string | undefined;
        fillRule?: "nonzero" | "evenodd" | "inherit" | undefined;
        filter?: string | undefined;
        filterRes?: number | string | undefined;
        filterUnits?: number | string | undefined;
        floodColor?: number | string | undefined;
        floodOpacity?: number | string | undefined;
        focusable?: Booleanish | "auto" | undefined;
        fontFamily?: string | undefined;
        fontSize?: number | string | undefined;
        fontSizeAdjust?: number | string | undefined;
        fontStretch?: number | string | undefined;
        fontStyle?: number | string | undefined;
        fontVariant?: number | string | undefined;
        fontWeight?: number | string | undefined;
        format?: number | string | undefined;
        fr?: number | string | undefined;
        from?: number | string | undefined;
        fx?: number | string | undefined;
        fy?: number | string | undefined;
        g1?: number | string | undefined;
        g2?: number | string | undefined;
        glyphName?: number | string | undefined;
        glyphOrientationHorizontal?: number | string | undefined;
        glyphOrientationVertical?: number | string | undefined;
        glyphRef?: number | string | undefined;
        gradientTransform?: string | undefined;
        gradientUnits?: string | undefined;
        hanging?: number | string | undefined;
        horizAdvX?: number | string | undefined;
        horizOriginX?: number | string | undefined;
        href?: string | undefined;
        ideographic?: number | string | undefined;
        imageRendering?: number | string | undefined;
        in2?: number | string | undefined;
        in?: string | undefined;
        intercept?: number | string | undefined;
        k1?: number | string | undefined;
        k2?: number | string | undefined;
        k3?: number | string | undefined;
        k4?: number | string | undefined;
        k?: number | string | undefined;
        kernelMatrix?: number | string | undefined;
        kernelUnitLength?: number | string | undefined;
        kerning?: number | string | undefined;
        keyPoints?: number | string | undefined;
        keySplines?: number | string | undefined;
        keyTimes?: number | string | undefined;
        lengthAdjust?: number | string | undefined;
        letterSpacing?: number | string | undefined;
        lightingColor?: number | string | undefined;
        limitingConeAngle?: number | string | undefined;
        local?: number | string | undefined;
        markerEnd?: string | undefined;
        markerHeight?: number | string | undefined;
        markerMid?: string | undefined;
        markerStart?: string | undefined;
        markerUnits?: number | string | undefined;
        markerWidth?: number | string | undefined;
        mask?: string | undefined;
        maskContentUnits?: number | string | undefined;
        maskUnits?: number | string | undefined;
        mathematical?: number | string | undefined;
        mode?: number | string | undefined;
        numOctaves?: number | string | undefined;
        offset?: number | string | undefined;
        opacity?: number | string | undefined;
        operator?: number | string | undefined;
        order?: number | string | undefined;
        orient?: number | string | undefined;
        orientation?: number | string | undefined;
        origin?: number | string | undefined;
        overflow?: number | string | undefined;
        overlinePosition?: number | string | undefined;
        overlineThickness?: number | string | undefined;
        paintOrder?: number | string | undefined;
        panose1?: number | string | undefined;
        path?: string | undefined;
        pathLength?: number | string | undefined;
        patternContentUnits?: string | undefined;
        patternTransform?: number | string | undefined;
        patternUnits?: string | undefined;
        pointerEvents?: number | string | undefined;
        points?: string | undefined;
        pointsAtX?: number | string | undefined;
        pointsAtY?: number | string | undefined;
        pointsAtZ?: number | string | undefined;
        preserveAlpha?: Booleanish | undefined;
        preserveAspectRatio?: string | undefined;
        primitiveUnits?: number | string | undefined;
        r?: number | string | undefined;
        radius?: number | string | undefined;
        refX?: number | string | undefined;
        refY?: number | string | undefined;
        renderingIntent?: number | string | undefined;
        repeatCount?: number | string | undefined;
        repeatDur?: number | string | undefined;
        requiredExtensions?: number | string | undefined;
        requiredFeatures?: number | string | undefined;
        restart?: number | string | undefined;
        result?: string | undefined;
        rotate?: number | string | undefined;
        rx?: number | string | undefined;
        ry?: number | string | undefined;
        scale?: number | string | undefined;
        seed?: number | string | undefined;
        shapeRendering?: number | string | undefined;
        slope?: number | string | undefined;
        spacing?: number | string | undefined;
        specularConstant?: number | string | undefined;
        specularExponent?: number | string | undefined;
        speed?: number | string | undefined;
        spreadMethod?: string | undefined;
        startOffset?: number | string | undefined;
        stdDeviation?: number | string | undefined;
        stemh?: number | string | undefined;
        stemv?: number | string | undefined;
        stitchTiles?: number | string | undefined;
        stopColor?: string | undefined;
        stopOpacity?: number | string | undefined;
        strikethroughPosition?: number | string | undefined;
        strikethroughThickness?: number | string | undefined;
        string?: number | string | undefined;
        stroke?: string | undefined;
        strokeDasharray?: string | number | undefined;
        strokeDashoffset?: string | number | undefined;
        strokeLinecap?: "butt" | "round" | "square" | "inherit" | undefined;
        strokeLinejoin?: "miter" | "round" | "bevel" | "inherit" | undefined;
        strokeMiterlimit?: number | string | undefined;
        strokeOpacity?: number | string | undefined;
        strokeWidth?: number | string | undefined;
        surfaceScale?: number | string | undefined;
        systemLanguage?: number | string | undefined;
        tableValues?: number | string | undefined;
        targetX?: number | string | undefined;
        targetY?: number | string | undefined;
        textAnchor?: string | undefined;
        textDecoration?: number | string | undefined;
        textLength?: number | string | undefined;
        textRendering?: number | string | undefined;
        to?: number | string | undefined;
        transform?: string | undefined;
        u1?: number | string | undefined;
        u2?: number | string | undefined;
        underlinePosition?: number | string | undefined;
        underlineThickness?: number | string | undefined;
        unicode?: number | string | undefined;
        unicodeBidi?: number | string | undefined;
        unicodeRange?: number | string | undefined;
        unitsPerEm?: number | string | undefined;
        vAlphabetic?: number | string | undefined;
        values?: string | undefined;
        vectorEffect?: number | string | undefined;
        version?: string | undefined;
        vertAdvY?: number | string | undefined;
        vertOriginX?: number | string | undefined;
        vertOriginY?: number | string | undefined;
        vHanging?: number | string | undefined;
        vIdeographic?: number | string | undefined;
        viewBox?: string | undefined;
        viewTarget?: number | string | undefined;
        visibility?: number | string | undefined;
        vMathematical?: number | string | undefined;
        widths?: number | string | undefined;
        wordSpacing?: number | string | undefined;
        writingMode?: number | string | undefined;
        x1?: number | string | undefined;
        x2?: number | string | undefined;
        x?: number | string | undefined;
        xChannelSelector?: string | undefined;
        xHeight?: number | string | undefined;
        xlinkActuate?: string | undefined;
        xlinkArcrole?: string | undefined;
        xlinkHref?: string | undefined;
        xlinkRole?: string | undefined;
        xlinkShow?: string | undefined;
        xlinkTitle?: string | undefined;
        xlinkType?: string | undefined;
        xmlBase?: string | undefined;
        xmlLang?: string | undefined;
        xmlns?: string | undefined;
        xmlnsXlink?: string | undefined;
        xmlSpace?: string | undefined;
        y1?: number | string | undefined;
        y2?: number | string | undefined;
        y?: number | string | undefined;
        yChannelSelector?: string | undefined;
        z?: number | string | undefined;
        zoomAndPan?: string | undefined;
    }

interface WebViewHTMLAttributes<T> extends HTMLAttributes<T> {
 allowFullScreen?: boolean | undefined;
 allowpopups?: boolean | undefined;
 autoFocus?: boolean | undefined;
 autosize?: boolean | undefined;
 blinkfeatures?: string | undefined;
 disableblinkfeatures?: string | undefined;
 disableguestresize?: boolean | undefined;
 disablewebsecurity?: boolean | undefined;
 guestinstance?: string | undefined;
 httpreferrer?: string | undefined;
 nodeintegration?: boolean | undefined;
 partition?: string | undefined;
 plugins?: boolean | undefined;
 preload?: string | undefined;
 src?: string | undefined;
 useragent?: string | undefined;
 webpreferences?: string | undefined;
 }

//
    // React.DOM
    // ----------------------------------------------------------------------

interface ReactHTML {
 a: DetailedHTMLFactory<AnchorHTMLAttributes<HTMLAnchorElement>, HTMLAnchorElement>;
 abbr: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
 address: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
 area: DetailedHTMLFactory<AreaHTMLAttributes<HTMLAreaElement>, HTMLAreaElement>;
 article: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
 aside: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
 audio: DetailedHTMLFactory<AudioHTMLAttributes<HTMLAudioElement>, HTMLAudioElement>;
 b: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
 base: DetailedHTMLFactory<BaseHTMLAttributes<HTMLBaseElement>, HTMLBaseElement>;
 bdi: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
 bdo: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
 big: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
 blockquote: DetailedHTMLFactory<BlockquoteHTMLAttributes<HTMLElement>, HTMLElement>;
 body: DetailedHTMLFactory<HTMLAttributes<HTMLBodyElement>, HTMLBodyElement>;
 br: DetailedHTMLFactory<HTMLAttributes<HTMLBRElement>, HTMLBRElement>;
 button: DetailedHTMLFactory<ButtonHTMLAttributes<HTMLButtonElement>, HTMLButtonElement>;
 canvas: DetailedHTMLFactory<CanvasHTMLAttributes<HTMLCanvasElement>, HTMLCanvasElement>;
 caption: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
 cite: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
 code: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
 col: DetailedHTMLFactory<ColHTMLAttributes<HTMLTableColElement>, HTMLTableColElement>;
 colgroup: DetailedHTMLFactory<ColgroupHTMLAttributes<HTMLTableColElement>, HTMLTableColElement>;
 data: DetailedHTMLFactory<DataHTMLAttributes<HTMLDataElement>, HTMLDataElement>;
 datalist: DetailedHTMLFactory<HTMLAttributes<HTMLDataListElement>, HTMLDataListElement>;
 dd: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
 del: DetailedHTMLFactory<DelHTMLAttributes<HTMLElement>, HTMLElement>;
 details: DetailedHTMLFactory<DetailsHTMLAttributes<HTMLElement>, HTMLElement>;
 dfn: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
 dialog: DetailedHTMLFactory<DialogHTMLAttributes<HTMLDialogElement>, HTMLDialogElement>;
 div: DetailedHTMLFactory<HTMLAttributes<HTMLDivElement>, HTMLDivElement>;
 dl: DetailedHTMLFactory<HTMLAttributes<HTMLDListElement>, HTMLDListElement>;
 dt: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
 em: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
 embed: DetailedHTMLFactory<EmbedHTMLAttributes<HTMLEmbedElement>, HTMLEmbedElement>;
 fieldset: DetailedHTMLFactory<FieldsetHTMLAttributes<HTMLFieldSetElement>, HTMLFieldSetElement>;
 figcaption: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
 figure: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
 footer: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
 form: DetailedHTMLFactory<FormHTMLAttributes<HTMLFormElement>, HTMLFormElement>;
 h1: DetailedHTMLFactory<HTMLAttributes<HTMLHeadingElement>, HTMLHeadingElement>;
 h2: DetailedHTMLFactory<HTMLAttributes<HTMLHeadingElement>, HTMLHeadingElement>;
 h3: DetailedHTMLFactory<HTMLAttributes<HTMLHeadingElement>, HTMLHeadingElement>;
 h4: DetailedHTMLFactory<HTMLAttributes<HTMLHeadingElement>, HTMLHeadingElement>;
 h5: DetailedHTMLFactory<HTMLAttributes<HTMLHeadingElement>, HTMLHeadingElement>;
 h6: DetailedHTMLFactory<HTMLAttributes<HTMLHeadingElement>, HTMLHeadingElement>;
 head: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLHeadElement>;
 header: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
 hgroup: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
 hr: DetailedHTMLFactory<HTMLAttributes<HTMLHRElement>, HTMLHRElement>;
 html: DetailedHTMLFactory<HtmlHTMLAttributes<HTMLHtmlElement>, HTMLHtmlElement>;
 i: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
 iframe: DetailedHTMLFactory<IframeHTMLAttributes<HTMLIFrameElement>, HTMLIFrameElement>;
 img: DetailedHTMLFactory<ImgHTMLAttributes<HTMLImageElement>, HTMLImageElement>;
 input: DetailedHTMLFactory<InputHTMLAttributes<HTMLInputElement>, HTMLInputElement>;
 ins: DetailedHTMLFactory<InsHTMLAttributes<HTMLModElement>, HTMLModElement>;
 kbd: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
 keygen: DetailedHTMLFactory<KeygenHTMLAttributes<HTMLElement>, HTMLElement>;
 label: DetailedHTMLFactory<LabelHTMLAttributes<HTMLLabelElement>, HTMLLabelElement>;
 legend: DetailedHTMLFactory<HTMLAttributes<HTMLLegendElement>, HTMLLegendElement>;
 li: DetailedHTMLFactory<LiHTMLAttributes<HTMLLIElement>, HTMLLIElement>;
 link: DetailedHTMLFactory<LinkHTMLAttributes<HTMLLinkElement>, HTMLLinkElement>;
 main: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
 map: DetailedHTMLFactory<MapHTMLAttributes<HTMLMapElement>, HTMLMapElement>;
 mark: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
 menu: DetailedHTMLFactory<MenuHTMLAttributes<HTMLElement>, HTMLElement>;
 menuitem: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
 meta: DetailedHTMLFactory<MetaHTMLAttributes<HTMLMetaElement>, HTMLMetaElement>;
 meter: DetailedHTMLFactory<MeterHTMLAttributes<HTMLElement>, HTMLElement>;
 nav: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
 noscript: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
 object: DetailedHTMLFactory<ObjectHTMLAttributes<HTMLObjectElement>, HTMLObjectElement>;
 ol: DetailedHTMLFactory<OlHTMLAttributes<HTMLOListElement>, HTMLOListElement>;
 optgroup: DetailedHTMLFactory<OptgroupHTMLAttributes<HTMLOptGroupElement>, HTMLOptGroupElement>;
 option: DetailedHTMLFactory<OptionHTMLAttributes<HTMLOptionElement>, HTMLOptionElement>;
 output: DetailedHTMLFactory<OutputHTMLAttributes<HTMLElement>, HTMLElement>;
 p: DetailedHTMLFactory<HTMLAttributes<HTMLParagraphElement>, HTMLParagraphElement>;
 param: DetailedHTMLFactory<ParamHTMLAttributes<HTMLParamElement>, HTMLParamElement>;
 picture: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
 pre: DetailedHTMLFactory<HTMLAttributes<HTMLPreElement>, HTMLPreElement>;
 progress: DetailedHTMLFactory<ProgressHTMLAttributes<HTMLProgressElement>, HTMLProgressElement>;
 q: DetailedHTMLFactory<QuoteHTMLAttributes<HTMLQuoteElement>, HTMLQuoteElement>;
 rp: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
 rt: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
 ruby: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
 s: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
 samp: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
 slot: DetailedHTMLFactory<SlotHTMLAttributes<HTMLSlotElement>, HTMLSlotElement>;
 script: DetailedHTMLFactory<ScriptHTMLAttributes<HTMLScriptElement>, HTMLScriptElement>;
 section: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
 select: DetailedHTMLFactory<SelectHTMLAttributes<HTMLSelectElement>, HTMLSelectElement>;
 small: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
 source: DetailedHTMLFactory<SourceHTMLAttributes<HTMLSourceElement>, HTMLSourceElement>;
 span: DetailedHTMLFactory<HTMLAttributes<HTMLSpanElement>, HTMLSpanElement>;
 strong: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
 style: DetailedHTMLFactory<StyleHTMLAttributes<HTMLStyleElement>, HTMLStyleElement>;
 sub: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
 summary: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
 sup: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
 table: DetailedHTMLFactory<TableHTMLAttributes<HTMLTableElement>, HTMLTableElement>;
 template: DetailedHTMLFactory<HTMLAttributes<HTMLTemplateElement>, HTMLTemplateElement>;
 tbody: DetailedHTMLFactory<HTMLAttributes<HTMLTableSectionElement>, HTMLTableSectionElement>;
 td: DetailedHTMLFactory<TdHTMLAttributes<HTMLTableDataCellElement>, HTMLTableDataCellElement>;
 textarea: DetailedHTMLFactory<TextareaHTMLAttributes<HTMLTextAreaElement>, HTMLTextAreaElement>;
 tfoot: DetailedHTMLFactory<HTMLAttributes<HTMLTableSectionElement>, HTMLTableSectionElement>;
 th: DetailedHTMLFactory<ThHTMLAttributes<HTMLTableHeaderCellElement>, HTMLTableHeaderCellElement>;
 thead: DetailedHTMLFactory<HTMLAttributes<HTMLTableSectionElement>, HTMLTableSectionElement>;
 time: DetailedHTMLFactory<TimeHTMLAttributes<HTMLElement>, HTMLElement>;
 title: DetailedHTMLFactory<HTMLAttributes<HTMLTitleElement>, HTMLTitleElement>;
 tr: DetailedHTMLFactory<HTMLAttributes<HTMLTableRowElement>, HTMLTableRowElement>;
 track: DetailedHTMLFactory<TrackHTMLAttributes<HTMLTrackElement>, HTMLTrackElement>;
 u: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
 ul: DetailedHTMLFactory<HTMLAttributes<HTMLUListElement>, HTMLUListElement>;
 "var": DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
 video: DetailedHTMLFactory<VideoHTMLAttributes<HTMLVideoElement>, HTMLVideoElement>;
 wbr: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
 webview: DetailedHTMLFactory<WebViewHTMLAttributes<HTMLWebViewElement>, HTMLWebViewElement>;
 }

interface ReactSVG {
        animate: SVGFactory;
        circle: SVGFactory;
        clipPath: SVGFactory;
        defs: SVGFactory;
        desc: SVGFactory;
        ellipse: SVGFactory;
        feBlend: SVGFactory;
        feColorMatrix: SVGFactory;
        feComponentTransfer: SVGFactory;
        feComposite: SVGFactory;
        feConvolveMatrix: SVGFactory;
        feDiffuseLighting: SVGFactory;
        feDisplacementMap: SVGFactory;
        feDistantLight: SVGFactory;
        feDropShadow: SVGFactory;
        feFlood: SVGFactory;
        feFuncA: SVGFactory;
        feFuncB: SVGFactory;
        feFuncG: SVGFactory;
        feFuncR: SVGFactory;
        feGaussianBlur: SVGFactory;
        feImage: SVGFactory;
        feMerge: SVGFactory;
        feMergeNode: SVGFactory;
        feMorphology: SVGFactory;
        feOffset: SVGFactory;
        fePointLight: SVGFactory;
        feSpecularLighting: SVGFactory;
        feSpotLight: SVGFactory;
        feTile: SVGFactory;
        feTurbulence: SVGFactory;
        filter: SVGFactory;
        foreignObject: SVGFactory;
        g: SVGFactory;
        image: SVGFactory;
        line: SVGFactory;
        linearGradient: SVGFactory;
        marker: SVGFactory;
        mask: SVGFactory;
        metadata: SVGFactory;
        path: SVGFactory;
        pattern: SVGFactory;
        polygon: SVGFactory;
        polyline: SVGFactory;
        radialGradient: SVGFactory;
        rect: SVGFactory;
        stop: SVGFactory;
        svg: SVGFactory;
        switch: SVGFactory;
        symbol: SVGFactory;
        text: SVGFactory;
        textPath: SVGFactory;
        tspan: SVGFactory;
        use: SVGFactory;
        view: SVGFactory;
    }

interface ReactDOM extends ReactHTML, ReactSVG { }

//
    // React.PropTypes
    // ----------------------------------------------------------------------

type Validator<T> = PropTypes.Validator<T>;

type Requireable<T> = PropTypes.Requireable<T>;

type ValidationMap<T> = PropTypes.ValidationMap<T>;

type WeakValidationMap<T> = {
 [K in keyof T]?: null extends T[K]
 ? Validator<T[K] | null | undefined>
 : undefined extends T[K]
 ? Validator<T[K] | null | undefined>
 : Validator<T[K]>
 };

interface ReactPropTypes {
        any: typeof PropTypes.any;
        array: typeof PropTypes.array;
        bool: typeof PropTypes.bool;
        func: typeof PropTypes.func;
        number: typeof PropTypes.number;
        object: typeof PropTypes.object;
        string: typeof PropTypes.string;
        node: typeof PropTypes.node;
        element: typeof PropTypes.element;
        instanceOf: typeof PropTypes.instanceOf;
        oneOf: typeof PropTypes.oneOf;
        oneOfType: typeof PropTypes.oneOfType;
        arrayOf: typeof PropTypes.arrayOf;
        objectOf: typeof PropTypes.objectOf;
        shape: typeof PropTypes.shape;
        exact: typeof PropTypes.exact;
    }

//
    // React.Children
    // ----------------------------------------------------------------------

interface ReactChildren {
 map<T, C>(children: C | ReadonlyArray<C>, fn: (child: C, index: number) => T):
 C extends null | undefined ? C : Array<Exclude<T, boolean | null | undefined>>;
 forEach<C>(children: C | ReadonlyArray<C>, fn: (child: C, index: number) => void): void;
 count(children: any): number;
 only<C>(children: C): C extends any[] ? never : C;
 toArray(children: ReactNode | ReactNode[]): Array<Exclude<ReactNode, boolean | null | undefined>>;
 }

//
    // Browser Interfaces
    // https://github.com/nikeee/2048-typescript/blob/master/2048/js/touch.d.ts
    // ----------------------------------------------------------------------

interface AbstractView {
        styleMedia: StyleMedia;
        document: Document;
    }

interface Touch {
        identifier: number;
        target: EventTarget;
        screenX: number;
        screenY: number;
        clientX: number;
        clientY: number;
        pageX: number;
        pageY: number;
    }

interface TouchList {
        [index: number]: Touch;
        length: number;
        item(index: number): Touch;
        identifiedTouch(identifier: number): Touch;
    }

//
    // Error Interfaces
    // ----------------------------------------------------------------------
    interface ErrorInfo {
        /**
         * Captures which component contained the exception, and its ancestors.
         */
        componentStack: string;
    }
}

// naked 'any' type in a conditional type will short circuit and union both the then/else branches
// so boolean is only resolved for T = any
type IsExactlyAny<T> = boolean extends (T extends never ? true : false) ? true : false;

type ExactlyAnyPropertyKeys<T> = { [K in keyof T]: IsExactlyAny<T[K]> extends true ? K : never }[keyof T];
type NotExactlyAnyPropertyKeys<T> = Exclude<keyof T, ExactlyAnyPropertyKeys<T>>;

// Try to resolve ill-defined props like for JS users: props can be any, or sometimes objects with properties of type any
type MergePropTypes<P, T> =
 // Distribute over P in case it is a union type
 P extends any
 // If props is type any, use propTypes definitions
 ? IsExactlyAny extends true ? T :
 // If declared props have indexed properties, ignore inferred props entirely as keyof gets widened
 string extends keyof P ? P :
 // Prefer declared types which are not exactly any
 & Pick<P, NotExactlyAnyPropertyKeys>
 // For props which are exactly any, use the type inferred from propTypes if present
 & Pick<T, Exclude<keyof T, NotExactlyAnyPropertyKeys>>
 // Keep leftover props not specified in propTypes
 & Pick<P, Exclude<keyof P, keyof T>>
 : never;

// Any prop that has a default prop becomes optional, but its type is unchanged
// Undeclared default props are augmented into the resulting allowable attributes
// If declared props have indexed properties, ignore default props entirely as keyof gets widened
// Wrap in an outer-level conditional type to allow distribution over props that are unions
type Defaultize<P, D> = P extends any
 ? string extends keyof P ? P :
 & Pick<P, Exclude<keyof P, keyof D>>
 & Partial<Pick<P, Extract<keyof P, keyof D>>>
 & Partial<Pick<D, Exclude<keyof D, keyof P>>>
 : never;

type ReactManagedAttributes<C, P> = C extends { propTypes: infer T; defaultProps: infer D; }
 ? Defaultize<MergePropTypes<P, PropTypes.InferProps<T>>, D>
 : C extends { propTypes: infer T; }
 ? MergePropTypes<P, PropTypes.InferProps<T>>
 : C extends { defaultProps: infer D; }
 ? Defaultize<P, D>
 : P;

declare global {
 namespace JSX {
 interface Element extends React.ReactElement<any, any> { }
 interface ElementClass extends React.Component<any> {
 render(): React.ReactNode;
 }
 interface ElementAttributesProperty { props: {}; }
 interface ElementChildrenAttribute { children: {}; }

// We can't recurse forever because `type` can't be self-referential;
 // let's assume it's reasonable to do a single React.lazy() around a single React.memo() / vice-versa
 type LibraryManagedAttributes<C, P> = C extends React.MemoExoticComponent<infer T> | React.LazyExoticComponent<infer T>
 ? T extends React.MemoExoticComponent<infer U> | React.LazyExoticComponent<infer U>
 ? ReactManagedAttributes<U, P>
 : ReactManagedAttributes<T, P>
 : ReactManagedAttributes<C, P>;

interface IntrinsicAttributes extends React.Attributes { }
 interface IntrinsicClassAttributes<T> extends React.ClassAttributes<T> { }

interface IntrinsicElements {
 // HTML
 a: React.DetailedHTMLProps<React.AnchorHTMLAttributes<HTMLAnchorElement>, HTMLAnchorElement>;
 abbr: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
 address: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
 area: React.DetailedHTMLProps<React.AreaHTMLAttributes<HTMLAreaElement>, HTMLAreaElement>;
 article: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
 aside: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
 audio: React.DetailedHTMLProps<React.AudioHTMLAttributes<HTMLAudioElement>, HTMLAudioElement>;
 b: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
 base: React.DetailedHTMLProps<React.BaseHTMLAttributes<HTMLBaseElement>, HTMLBaseElement>;
 bdi: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
 bdo: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
 big: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
 blockquote: React.DetailedHTMLProps<React.BlockquoteHTMLAttributes<HTMLElement>, HTMLElement>;
 body: React.DetailedHTMLProps<React.HTMLAttributes<HTMLBodyElement>, HTMLBodyElement>;
 br: React.DetailedHTMLProps<React.HTMLAttributes<HTMLBRElement>, HTMLBRElement>;
 button: React.DetailedHTMLProps<React.ButtonHTMLAttributes<HTMLButtonElement>, HTMLButtonElement>;
 canvas: React.DetailedHTMLProps<React.CanvasHTMLAttributes<HTMLCanvasElement>, HTMLCanvasElement>;
 caption: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
 cite: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
 code: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
 col: React.DetailedHTMLProps<React.ColHTMLAttributes<HTMLTableColElement>, HTMLTableColElement>;
 colgroup: React.DetailedHTMLProps<React.ColgroupHTMLAttributes<HTMLTableColElement>, HTMLTableColElement>;
 data: React.DetailedHTMLProps<React.DataHTMLAttributes<HTMLDataElement>, HTMLDataElement>;
 datalist: React.DetailedHTMLProps<React.HTMLAttributes<HTMLDataListElement>, HTMLDataListElement>;
 dd: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
 del: React.DetailedHTMLProps<React.DelHTMLAttributes<HTMLElement>, HTMLElement>;
 details: React.DetailedHTMLProps<React.DetailsHTMLAttributes<HTMLElement>, HTMLElement>;
 dfn: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
 dialog: React.DetailedHTMLProps<React.DialogHTMLAttributes<HTMLDialogElement>, HTMLDialogElement>;
 div: React.DetailedHTMLProps<React.HTMLAttributes<HTMLDivElement>, HTMLDivElement>;
 dl: React.DetailedHTMLProps<React.HTMLAttributes<HTMLDListElement>, HTMLDListElement>;
 dt: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
 em: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
 embed: React.DetailedHTMLProps<React.EmbedHTMLAttributes<HTMLEmbedElement>, HTMLEmbedElement>;
 fieldset: React.DetailedHTMLProps<React.FieldsetHTMLAttributes<HTMLFieldSetElement>, HTMLFieldSetElement>;
 figcaption: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
 figure: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
 footer: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
 form: React.DetailedHTMLProps<React.FormHTMLAttributes<HTMLFormElement>, HTMLFormElement>;
 h1: React.DetailedHTMLProps<React.HTMLAttributes<HTMLHeadingElement>, HTMLHeadingElement>;
 h2: React.DetailedHTMLProps<React.HTMLAttributes<HTMLHeadingElement>, HTMLHeadingElement>;
 h3: React.DetailedHTMLProps<React.HTMLAttributes<HTMLHeadingElement>, HTMLHeadingElement>;
 h4: React.DetailedHTMLProps<React.HTMLAttributes<HTMLHeadingElement>, HTMLHeadingElement>;
 h5: React.DetailedHTMLProps<React.HTMLAttributes<HTMLHeadingElement>, HTMLHeadingElement>;
 h6: React.DetailedHTMLProps<React.HTMLAttributes<HTMLHeadingElement>, HTMLHeadingElement>;
 head: React.DetailedHTMLProps<React.HTMLAttributes<HTMLHeadElement>, HTMLHeadElement>;
 header: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
 hgroup: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
 hr: React.DetailedHTMLProps<React.HTMLAttributes<HTMLHRElement>, HTMLHRElement>;
 html: React.DetailedHTMLProps<React.HtmlHTMLAttributes<HTMLHtmlElement>, HTMLHtmlElement>;
 i: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
 iframe: React.DetailedHTMLProps<React.IframeHTMLAttributes<HTMLIFrameElement>, HTMLIFrameElement>;
 img: React.DetailedHTMLProps<React.ImgHTMLAttributes<HTMLImageElement>, HTMLImageElement>;
 input: React.DetailedHTMLProps<React.InputHTMLAttributes<HTMLInputElement>, HTMLInputElement>;
 ins: React.DetailedHTMLProps<React.InsHTMLAttributes<HTMLModElement>, HTMLModElement>;
 kbd: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
 keygen: React.DetailedHTMLProps<React.KeygenHTMLAttributes<HTMLElement>, HTMLElement>;
 label: React.DetailedHTMLProps<React.LabelHTMLAttributes<HTMLLabelElement>, HTMLLabelElement>;
 legend: React.DetailedHTMLProps<React.HTMLAttributes<HTMLLegendElement>, HTMLLegendElement>;
 li: React.DetailedHTMLProps<React.LiHTMLAttributes<HTMLLIElement>, HTMLLIElement>;
 link: React.DetailedHTMLProps<React.LinkHTMLAttributes<HTMLLinkElement>, HTMLLinkElement>;
 main: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
 map: React.DetailedHTMLProps<React.MapHTMLAttributes<HTMLMapElement>, HTMLMapElement>;
 mark: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
 menu: React.DetailedHTMLProps<React.MenuHTMLAttributes<HTMLElement>, HTMLElement>;
 menuitem: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
 meta: React.DetailedHTMLProps<React.MetaHTMLAttributes<HTMLMetaElement>, HTMLMetaElement>;
 meter: React.DetailedHTMLProps<React.MeterHTMLAttributes<HTMLElement>, HTMLElement>;
 nav: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
 noindex: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
 noscript: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
 object: React.DetailedHTMLProps<React.ObjectHTMLAttributes<HTMLObjectElement>, HTMLObjectElement>;
 ol: React.DetailedHTMLProps<React.OlHTMLAttributes<HTMLOListElement>, HTMLOListElement>;
 optgroup: React.DetailedHTMLProps<React.OptgroupHTMLAttributes<HTMLOptGroupElement>, HTMLOptGroupElement>;
 option: React.DetailedHTMLProps<React.OptionHTMLAttributes<HTMLOptionElement>, HTMLOptionElement>;
 output: React.DetailedHTMLProps<React.OutputHTMLAttributes<HTMLElement>, HTMLElement>;
 p: React.DetailedHTMLProps<React.HTMLAttributes<HTMLParagraphElement>, HTMLParagraphElement>;
 param: React.DetailedHTMLProps<React.ParamHTMLAttributes<HTMLParamElement>, HTMLParamElement>;
 picture: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
 pre: React.DetailedHTMLProps<React.HTMLAttributes<HTMLPreElement>, HTMLPreElement>;
 progress: React.DetailedHTMLProps<React.ProgressHTMLAttributes<HTMLProgressElement>, HTMLProgressElement>;
 q: React.DetailedHTMLProps<React.QuoteHTMLAttributes<HTMLQuoteElement>, HTMLQuoteElement>;
 rp: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
 rt: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
 ruby: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
 s: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
 samp: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
 slot: React.DetailedHTMLProps<React.SlotHTMLAttributes<HTMLSlotElement>, HTMLSlotElement>;
 script: React.DetailedHTMLProps<React.ScriptHTMLAttributes<HTMLScriptElement>, HTMLScriptElement>;
 section: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
 select: React.DetailedHTMLProps<React.SelectHTMLAttributes<HTMLSelectElement>, HTMLSelectElement>;
 small: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
 source: React.DetailedHTMLProps<React.SourceHTMLAttributes<HTMLSourceElement>, HTMLSourceElement>;
 span: React.DetailedHTMLProps<React.HTMLAttributes<HTMLSpanElement>, HTMLSpanElement>;
 strong: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
 style: React.DetailedHTMLProps<React.StyleHTMLAttributes<HTMLStyleElement>, HTMLStyleElement>;
 sub: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
 summary: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
 sup: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
 table: React.DetailedHTMLProps<React.TableHTMLAttributes<HTMLTableElement>, HTMLTableElement>;
 template: React.DetailedHTMLProps<React.HTMLAttributes<HTMLTemplateElement>, HTMLTemplateElement>;
 tbody: React.DetailedHTMLProps<React.HTMLAttributes<HTMLTableSectionElement>, HTMLTableSectionElement>;
 td: React.DetailedHTMLProps<React.TdHTMLAttributes<HTMLTableDataCellElement>, HTMLTableDataCellElement>;
 textarea: React.DetailedHTMLProps<React.TextareaHTMLAttributes<HTMLTextAreaElement>, HTMLTextAreaElement>;
 tfoot: React.DetailedHTMLProps<React.HTMLAttributes<HTMLTableSectionElement>, HTMLTableSectionElement>;
 th: React.DetailedHTMLProps<React.ThHTMLAttributes<HTMLTableHeaderCellElement>, HTMLTableHeaderCellElement>;
 thead: React.DetailedHTMLProps<React.HTMLAttributes<HTMLTableSectionElement>, HTMLTableSectionElement>;
 time: React.DetailedHTMLProps<React.TimeHTMLAttributes<HTMLElement>, HTMLElement>;
 title: React.DetailedHTMLProps<React.HTMLAttributes<HTMLTitleElement>, HTMLTitleElement>;
 tr: React.DetailedHTMLProps<React.HTMLAttributes<HTMLTableRowElement>, HTMLTableRowElement>;
 track: React.DetailedHTMLProps<React.TrackHTMLAttributes<HTMLTrackElement>, HTMLTrackElement>;
 u: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
 ul: React.DetailedHTMLProps<React.HTMLAttributes<HTMLUListElement>, HTMLUListElement>;
 "var": React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
 video: React.DetailedHTMLProps<React.VideoHTMLAttributes<HTMLVideoElement>, HTMLVideoElement>;
 wbr: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
 webview: React.DetailedHTMLProps<React.WebViewHTMLAttributes<HTMLWebViewElement>, HTMLWebViewElement>;

// SVG
 svg: React.SVGProps<SVGSVGElement>;

animate: React.SVGProps<SVGElement>; // TODO: It is SVGAnimateElement but is not in TypeScript's lib.dom.d.ts for now.
 animateMotion: React.SVGProps<SVGElement>;
 animateTransform: React.SVGProps<SVGElement>; // TODO: It is SVGAnimateTransformElement but is not in TypeScript's lib.dom.d.ts for now.
 circle: React.SVGProps<SVGCircleElement>;
 clipPath: React.SVGProps<SVGClipPathElement>;
 defs: React.SVGProps<SVGDefsElement>;
 desc: React.SVGProps<SVGDescElement>;
 ellipse: React.SVGProps<SVGEllipseElement>;
 feBlend: React.SVGProps<SVGFEBlendElement>;
 feColorMatrix: React.SVGProps<SVGFEColorMatrixElement>;
 feComponentTransfer: React.SVGProps<SVGFEComponentTransferElement>;
 feComposite: React.SVGProps<SVGFECompositeElement>;
 feConvolveMatrix: React.SVGProps<SVGFEConvolveMatrixElement>;
 feDiffuseLighting: React.SVGProps<SVGFEDiffuseLightingElement>;
 feDisplacementMap: React.SVGProps<SVGFEDisplacementMapElement>;
 feDistantLight: React.SVGProps<SVGFEDistantLightElement>;
 feDropShadow: React.SVGProps<SVGFEDropShadowElement>;
 feFlood: React.SVGProps<SVGFEFloodElement>;
 feFuncA: React.SVGProps<SVGFEFuncAElement>;
 feFuncB: React.SVGProps<SVGFEFuncBElement>;
 feFuncG: React.SVGProps<SVGFEFuncGElement>;
 feFuncR: React.SVGProps<SVGFEFuncRElement>;
 feGaussianBlur: React.SVGProps<SVGFEGaussianBlurElement>;
 feImage: React.SVGProps<SVGFEImageElement>;
 feMerge: React.SVGProps<SVGFEMergeElement>;
 feMergeNode: React.SVGProps<SVGFEMergeNodeElement>;
 feMorphology: React.SVGProps<SVGFEMorphologyElement>;
 feOffset: React.SVGProps<SVGFEOffsetElement>;
 fePointLight: React.SVGProps<SVGFEPointLightElement>;
 feSpecularLighting: React.SVGProps<SVGFESpecularLightingElement>;
 feSpotLight: React.SVGProps<SVGFESpotLightElement>;
 feTile: React.SVGProps<SVGFETileElement>;
 feTurbulence: React.SVGProps<SVGFETurbulenceElement>;
 filter: React.SVGProps<SVGFilterElement>;
 foreignObject: React.SVGProps<SVGForeignObjectElement>;
 g: React.SVGProps<SVGGElement>;
 image: React.SVGProps<SVGImageElement>;
 line: React.SVGProps<SVGLineElement>;
 linearGradient: React.SVGProps<SVGLinearGradientElement>;
 marker: React.SVGProps<SVGMarkerElement>;
 mask: React.SVGProps<SVGMaskElement>;
 metadata: React.SVGProps<SVGMetadataElement>;
 mpath: React.SVGProps<SVGElement>;
 path: React.SVGProps<SVGPathElement>;
 pattern: React.SVGProps<SVGPatternElement>;
 polygon: React.SVGProps<SVGPolygonElement>;
 polyline: React.SVGProps<SVGPolylineElement>;
 radialGradient: React.SVGProps<SVGRadialGradientElement>;
 rect: React.SVGProps<SVGRectElement>;
 stop: React.SVGProps<SVGStopElement>;
 switch: React.SVGProps<SVGSwitchElement>;
 symbol: React.SVGProps<SVGSymbolElement>;
 text: React.SVGProps<SVGTextElement>;
 textPath: React.SVGProps<SVGTextPathElement>;
 tspan: React.SVGProps<SVGTSpanElement>;
 use: React.SVGProps<SVGUseElement>;
 view: React.SVGProps<SVGViewElement>;
 }
 }
}