When blacklisting all *.js or *.css files, aggregation stops working

Here is the patch for it

Issue appears only when I add "*.js" in exception ie when I don't want any of my js files to be loaded from CDN.
if I add any other path specific exception it works well.
my patch resolves the issue and works in both conditions.

Updated patch for failed testing.

More correct version.

Steps to Reproduce:

1. CDN mode is "Origin Pull" with Far Future expiration disabled.
2. I have blacklisted *.js in File URL Exceptions.
3. And Enabled "Aggregate JavaScript files".

Result:

JS files are not aggregated.

Reason:

/**
 * Implements hook_js_alter().
 *
 * Ensure that CDN-blacklisted JS files are not aggregated, so that the JS
 * aggregates can still be served from the CDN.
 */
function cdn_js_alter(&$javascript) {
  if (!cdn_status_is_enabled()) {
    return;
  }

  foreach (array_keys($javascript) as $key) {
    // Skip $type = 'inline'.
    if (is_numeric($key)) {
      continue;
    }
    // Skip $type = 'setttings'.
    elseif ($key === 'settings') {
      continue;
    }
    // Handle $type = 'file' and 'external'.
    elseif (!cdn_check_file($key)) {
      $javascript[$key]['preprocess'] = FALSE;
    }
  }
}

This code makes sure that CDN-blacklisted JS files are not aggregated.
but as I am blacklisting all my js file (*.js)
It's blocking aggregation of all JS files and as a result, No js files are aggregated.

Resolution:

I am adding a condition to check if all JS files are blacklisted then further code doesn't gets executed to block all JS files aggregation.

Hope this helps....

Working fine with the small update.

I'm attaching updated patch with:

• Updated *.css to *.js in cdn_js_alter().
• And combined If conditions.

Updated Patch after solving Errors.

Again... Updated Patch.

Tested and it is fixing the Bug.

Thanks :)