@cycle/dom/test/browser/setup.ts

The standard DOM Driver for Cycle.js, based on Snabbdom

export const isIE10 = !(window as any).MutationObserver;

if (isIE10) {
  (window as any).MutationObserver = require('mutation-observer');
}

if (!Element.prototype.matches) {
  Element.prototype.matches =
    (Element as any).prototype.matchesSelector ||
    (Element as any).prototype.mozMatchesSelector ||
    (Element as any).prototype.msMatchesSelector ||
    (Element as any).prototype.oMatchesSelector ||
    Element.prototype.webkitMatchesSelector;
}

import 'es6-map/implement'; // tslint:disable-line
import 'es6-set/implement'; // tslint:disable-line