angular/packages/elements/src/utils.ts

utils.ts

let matches = null;
export function matchesSelector(element: Element, selector: string): boolean {
  if (!matches) {
    const elProto = Element.prototype as any;
    matches = elProto.matches || elProto.matchesSelector || elProto.mozMatchesSelector ||
      elProto.msMatchesSelector || elProto.oMatchesSelector || elProto.webkitMatchesSelector;
  }
  return matches.call(element, selector);
}