Board Thread:Support Requests - Getting Technical/@comment-16319418-20170926155823/@comment-27958705-20171004211745

solution from stackoverflow (function { //https://stackoverflow.com/a/26596324    if ( typeof window.CustomEvent === "function" ) return false; //If not IE    function CustomEvent ( event, params ) {        params = params || { bubbles: false, cancelable: false, detail: undefined };        var evt = document.createEvent( 'CustomEvent' );        evt.initCustomEvent( event, params.bubbles, params.cancelable, params.detail );        return evt;    }    CustomEvent.prototype = window.Event.prototype;    window.CustomEvent = CustomEvent; }); adds to ie sane customevent support. and makes tabber working too, of course.