title: VS 2015: No highlighting and intellisense in JS files
body: <p>I can't really reproduce the issue, but no highlighting or intellisense is working in <code>.js</code> files, it works just fine in <code>.json</code> files however.<br />
  The default editor for <code>.js</code> files is JSON Editor.</p>
  <p>I tried safe-mode, disabling all extensions, resetting all settings, and I even reinstalled the IDE (repair), but the issue still persists.</p>
  <p>I will add, that when I launch the IDE and a JS file is open on scope, I get the following error message (highlighting and intellisense don't work anyway):</p>
  <blockquote>
  <p>The 'JavaScriptWebExtensionPackage' package did not load correctly.</p>
  <p>The problem may have been caused by a configuration change or by the installation of another extension. You can get more information examining the file 'C:\Users\Shimmy\AppData\Roaming\Microsoft\VisualStudio\14.0\ActivityLog.xml'.</p>
  <p>Restarting Visual Studio could help resolve the issue.</p>
  <p>Continue to show this error message?</p>
  </blockquote>
  <p><a href="http://pastebin.com/raw.php?i=4DizyM4S" rel="noreferrer">Here</a> you can view the <em>ActivityLog.xml</em> file, I pasted in some of the recent lines I think might be relevant:</p>
  <pre><code>&lt;entry&gt;
    &lt;record&gt;188&lt;/record&gt;
    &lt;time&gt;2015/08/14 13:00:57.332&lt;/time&gt;
    &lt;type&gt;Information&lt;/type&gt;
    &lt;source&gt;VisualStudio&lt;/source&gt;
    &lt;description&gt;Begin package load [JavaScriptWebExtensionsPackage]&lt;/description&gt;
    &lt;guid&gt;{30DB8F9B-EC9F-44D6-B377-83C7C27A1A8B}&lt;/guid&gt;
  &lt;/entry&gt;
  &lt;entry&gt;
    &lt;record&gt;189&lt;/record&gt;
    &lt;time&gt;2015/08/14 13:00:57.394&lt;/time&gt;
    &lt;type&gt;Error&lt;/type&gt;
    &lt;source&gt;VisualStudio&lt;/source&gt;
    &lt;description&gt;SetSite failed for package [JavaScriptWebExtensionsPackage]&lt;/description&gt;
    &lt;guid&gt;{30DB8F9B-EC9F-44D6-B377-83C7C27A1A8B}&lt;/guid&gt;
    &lt;hr&gt;80131500&lt;/hr&gt;
    &lt;errorinfo&gt;Expected 1 export(s) with contract name &quot;Microsoft.VisualStudio.JavaScript.Web.Extensions.ReferenceAutoSync.IReferencesFilePathProvider&quot; but found 0 after applying applicable constraints.&lt;/errorinfo&gt;
  &lt;/entry&gt;
  &lt;entry&gt;
    &lt;record&gt;190&lt;/record&gt;
    &lt;time&gt;2015/08/14 13:00:57.394&lt;/time&gt;
    &lt;type&gt;Error&lt;/type&gt;
    &lt;source&gt;VisualStudio&lt;/source&gt;
    &lt;description&gt;End package load [JavaScriptWebExtensionsPackage]&lt;/description&gt;
    &lt;guid&gt;{30DB8F9B-EC9F-44D6-B377-83C7C27A1A8B}&lt;/guid&gt;
    &lt;hr&gt;80131500&lt;/hr&gt;
    &lt;errorinfo&gt;Expected 1 export(s) with contract name &quot;Microsoft.VisualStudio.JavaScript.Web.Extensions.ReferenceAutoSync.IReferencesFilePathProvider&quot; but found 0 after applying applicable constraints.&lt;/errorinfo&gt;
  &lt;/entry&gt;
  </code></pre>