Polyfill HTML5 form attribute (for input fields)

Question

This is the markup I use:

    ...        
         


        

Answer 1

I take some time to send an update for this polyfill because it doesn't work with MS Edge.

I add 2 line to fix it :

      var isEdge = navigator.userAgent.indexOf("Edge");
      if (sampleElement && window.HTMLFormElement && sampleElement.form instanceof HTMLFormElement && !isIE11 && isEdge == -1) {
        // browser supports it, no need to fix
        return;
      }

UPDATE: Edge now support it: https://caniuse.com/#feat=form-attribute