title: How to view HTML template and CSS errors when using `pub serve` w/ Dartium?
body: <p>I am using <em>Angular-Dart</em> 4.0 with the "dart_to_js_script_rewriter" and angular transformers configured in <code>pubspec.yaml</code>, but testing with <em>Dartium</em>. <code>pub serve</code> works well except that:</p>
  
  <p>I have found out that an error message such as</p>
  
  <pre><code>Failed to load source asset my_project|lib/src/foo_component.html___jb_tmp___: 
  Could not find asset my_project|lib/src/foo_component.html___jb_tmp___.
  </code></pre>
  
  <p>means that I have some kind of error in that file and it could not be compiled. </p>
  
  <p>However the actual error in my template (like a tag which angular doesn't know...) or in the CSS (bad selector) is not reported in pub's output (not even with <code>-v</code> switch) and also not in Dartium console (which makes sense, since the file isn't served to the Browser).</p>
  
  <p>Is there a way to view such errors or do a validity check on the Angular templates and CSS? </p>