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"use strict";

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");

exports.__esModule = true;
exports.default = offset;

var _contains = _interopRequireDefault(require("./contains"));

var _isWindow = _interopRequireDefault(require("./isWindow"));

var _ownerDocument = _interopRequireDefault(require("../ownerDocument"));

function offset(node) {
  var doc = (0, _ownerDocument.default)(node),
      win = (0, _isWindow.default)(doc),
      docElem = doc && doc.documentElement,
      box = {
    top: 0,
    left: 0,
    height: 0,
    width: 0
  };
  if (!doc) return; // Make sure it's not a disconnected DOM node

if (!(0, _contains.default)(docElem, node)) return box;
  if (node.getBoundingClientRect !== undefined) box = node.getBoundingClientRect(); // IE8 getBoundingClientRect doesn't support width & height

box = {
    top: box.top + (win.pageYOffset || docElem.scrollTop) - (docElem.clientTop || 0),
    left: box.left + (win.pageXOffset || docElem.scrollLeft) - (docElem.clientLeft || 0),
    width: (box.width == null ? node.offsetWidth : box.width) || 0,
    height: (box.height == null ? node.offsetHeight : box.height) || 0
  };
  return box;
}

module.exports = exports["default"];