checkifie

var browserIsIE = /*@@cc_on!@@*/false || !!document.documentMode;
if (browserIsIE) {
    $('#ieWarningModal').modal('show'); //create html element as modal
    console.log('WARNING: You are using Internet Explorer!');
}

/*Internet Explorer is not supported.

This browser is outdated and not fully supported for the css-portal. 
Please note that some of the pages will not get displayed, so please use the latest version of Microsoft Edge, Google Chrome, or Mozilla Firefox 
*/