Add file extensions when auto-completing import paths #35730

• VSCode Version: Code 1.17.0 (be377c0, 2017-10-05T06:07:51.906Z)
• OS Version: Darwin x64 16.7.0
• Extensions:

Steps to Reproduce:

1. Open or create a JavaScript file
2. Start typing import x from './ followed by the name of a sibling file

Reproduces without extensions: Yes

When you start writing a local import statement, the intellisense helper will offer up foo and bar rather than foo.js and bar.js. Extensionless imports is a Node idiom that is incompatible with browser module loaders — adding the file extension would increase browser compatibility with no ill-effect on Node apps (to the contrary, it speeds up module resolution, and I'd argue it makes code more explicit and readable).

I wonder if you would consider changing the behaviour to add file extensions by default?