se/SE/static/ie-polyfills.js

(function () { // window.CustomEvent for ie >= 9

	if ( typeof window.CustomEvent === "function" ) return false;

	function CustomEvent ( event, params ) {
		params = params || { bubbles: false, cancelable: false, detail: null };
		var evt = document.createEvent( 'CustomEvent' );
		evt.initCustomEvent( event, params.bubbles, params.cancelable, params.detail );
		return evt;
	}

	window.CustomEvent = CustomEvent;
})();