Function matchesSelector

packages/elements/src/utils.ts:60–72

(el: any, selector: string)

 * be consolidated in the future
 */
export function matchesSelector(el: any, selector: string): boolean {
  if (!_matches) {
    const elProto = <any>Element.prototype;
    _matches =
      elProto.matches ||
      elProto.matchesSelector ||
      elProto.mozMatchesSelector ||
      elProto.msMatchesSelector ||
      elProto.oMatchesSelector ||
      elProto.webkitMatchesSelector;
  }
  return el.nodeType === Node.ELEMENT_NODE ? _matches.call(el, selector) : false;
}

/**
 * Test two values for strict equality, accounting for the fact that `NaN !== NaN`.