Simple ES5 fallback for download attribute (IE11)

download-attribute-fallback.js

(function () {
    'use strict';
  
    //handle browsers that do not support download attribute
    if (Modernizr.adownload === false) {

        //get array of all links and area's with download attributes
        var $downloadElements = Array.prototype.slice.call(document.querySelectorAll('a[download], area[download]'));

        //remove download attributes
        $downloadElements.forEach(function ($downloadElement) {
            $downloadElement.removeAttribute('download');
        });
    }
})();