Wrong execution order in IE and FF with imports containing scripts

[nippur72]

In IE11 and FF scripts contained in html imports are executed with wrong order, e.g.:

   <link rel="import" href="file1.html">     
   <script src="file2.js"></script>

• in IE and FF: first executed is file2 and then file1 (wrong)
• in Chrome: first executed is file1 and then file2 (correct)

Is this supposed to be so, or it's a bug?

[sorvell]

This is true of HTML imports and scripts in the main document only and is a limitation of the HTMLImports polyfill. The polyfill provides an event which can be used to emulate the order of the native implementation in Chrome. Code loaded in the main document that depends on content in HTMLImports can listen for the HTMLImportsLoaded event. For example,

addEventListener('HTMLImportsLoaded', function() {
  // do stuff that depends on HTMLImports content
});

[nippur72]

I think we should add this to the "Known Issues" list in the README.md