get the absBaseUrl via executing script fileName

I was using vs2013, and I found the following files
- require.config.js
- require.intellisense.js
- require.intellisense-setup.js
 
in this fold
>C:\Program Files (x86)\Microsoft Visual Studio 12.0\JavaScript\References\

I don't know how to use them, but we can use the property `executingScriptFileName` of `intenllisense` found in require.intellisense.js