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: / var / canvas / node_modules / dom-helpers / query /

Filename : contains.js

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"use strict";

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

exports.__esModule = true;
exports.default = void 0;

var _inDOM = _interopRequireDefault(require("../util/inDOM"));

var _default = function () {
  // HTML DOM and SVG DOM may have different support levels,
  // so we need to check on context instead of a document root element.
  return _inDOM.default ? function (context, node) {
    if (context.contains) {
      return context.contains(node);
    } else if (context.compareDocumentPosition) {
      return context === node || !!(context.compareDocumentPosition(node) & 16);
    } else {
      return fallback(context, node);
    }
  } : fallback;
}();

exports.default = _default;

function fallback(context, node) {
  if (node) do {
    if (node === context) return true;
  } while (node = node.parentNode);
  return false;
}

module.exports = exports["default"];