It's a very recent addition. IE11 doesn't have it for sure.

Not in Edge though.

The page I linked has a compatibility chart that says Edge 16 has it (no idea if that's a planned release, haven't ever used Edge).

You can use Array.prototype.forEach.call(nodelist, fn), or Arrays.from(nodelist).forEach

I don't use Windows so I can't test it, but would this work as a polyfill?

    NodeList.prototype.forEach = Array.prototype.forEach;

In Chrome this even returns true:

    NodeList.prototype.forEach === Array.prototype.forEach

Tested in IE11, document.documentMode===11

  Array.prototype.forEach.call(document.querySelectorAll('div'), console.log)

seams to work