Module Load Progress Events In NaCl With Manifest_version = 2 And No Inline Javascript

I upgraded my manifest_version to '2' as per this document, and then was suprised to see chrome burping up errors like: Refused to execute inline script because it violates the fo

Solution 1:

According to the documentation for NaCl progress events, event listeners have to be added as follows:

<div id="listener">
  <script type="text/javascript">
    document.getElementById('listener').addEventListener('load', function() {
        // Example
    }, true);
  </script>
  <embed name="nacl_module" ... type="application/x-nacl" />
</div>

This if forbidden by the Content security policy (see also). There's only one way to solve it: By moving the script to an external file:

<div id="listener">
  <script src="listener-load.js"></script>
  <embed name="nacl_module" ... type="application/x-nacl" />
</div>

// listener-load.js:
document.getElementById('listener').addEventListener('load', ..., true);

Because the construction of the DOM blocks until the external file is loaded, the script is loaded before the <embed> tag is inserted. Since the external files are packaged with the extension, the impact on performance can be neglected.