I have set up a minimal example where the issue with Reshaper 7 is proven without a doubt.
Update 15th August 2013: JetBrains has confirmed to me that this is an issue (unimplemented feature) in Resharper and that there are no plans on fixing/adding it to the tool.
Here you see the three files (demoLib.js, demoLib.intellisense.js and appCode.js) setup in Visual Studio 2012. Visual Studio 2012 and Resharper 7 are both set to their default setting values.
When you now enter “someFunc(” in the “appCode.js” text-editor window you would expect to see the enriched Intellisense popup with function parameter and description data shown. Alas, all you get is this:
Retrying to enter “someFunc(” in the “appCode.js” text-editor window now displays the enriched Intellisense popup with function parameter and description data: