Download attribute on A tag not working in IE

In my case, since there's a requirement to support the usage of IE 11 (version 11.0.9600.18665), I ended up using the solution provided by @Henners on his comment:

// IE10+ : (has Blob, but not a[download] or URL)
if (navigator.msSaveBlob) {
    return navigator.msSaveBlob(blob, fileName);
}

It's quite simple and practical.

Apparently, this solution was found on the Javascript download function created by dandavis.

Internet Explorer does not presently support the Download attribute on A tags.

See http://caniuse.com/download and http://status.modern.ie/adownloadattribute; the latter indicates that the feature is "Under consideration" for IE12.