I had Visual Studio 2015 CTP 4 installed and now CTP6 - In both cases it was missing Javascript support.
Not showing syntax highlighting for .js file
Intellisense not working for .js files
Also when i go to tools/options/Text Editor - Javascript language section is missing. See image and its comparison with VS2013.
Image At: https://social.msdn.microsoft.com/Forums/getfile/615484
I know this is a little late but this fixed the issue for me. https://social.msdn.microsoft.com/Forums/sqlserver/en-US/f3693b97-7fb1-4b9a-9953-1970b767a407/visual-studio-2015-ctp-javascript-support-missing?forum=visualstudiogeneral
To expand on what @user3810312 said...
- If you installed to another drive, copy your
C:\Program Files (x86)\Visual Studio 14.0folder on top of your install. - Open the Visual Studio Command prompt as an administrator (right-click run as Administrator)
- Navigate to the directory where VS 2015 is installed
- Run
devenv /setup - Run
devenv.exe /InstallVSTemplates
I had Intellisense the next time I booted up Visual Studio 2015. Worked like a charm.
来源：https://stackoverflow.com/questions/28704964/visual-studio-2015-ctp-javascript-support-missing