elements bundle not loading in IE 10/11

[ciampo]

I'm working to a Polymer app, and I'm trying to make the page load fast by:

• loading app.js and elements.html asynchronously (with the async tag set in index.html)
• loading the WebComponents polyfill only if necessary

I had to give up on the async load of elements.html, because of Polymer's buggy behaviour (see issue 2481 and issue 2522).

But even after that, the elements.html file won't load in Internet Explorer 10/11. I had a look to this polymer-gmail project after I saw the talk at the Polymer Summit 2015, and I found the same problem: the elements.html file just doesn't get downloaded in IE10 / 11.

Any idea?

[ebidel]

I need more info. Are you able to get it working if wc.js is always loaded, and not async? It could be a timing issue with the polyfills. What does the network panel show?

[ciampo]

Yes, yesterday I tried to always load the WC polyfill in a render-blocking way, and it seemed to fix the problem.

I'll take a deeper look and I'll come back with more info