TypeScript Support

[slemeur]

Goal

The current Eclipse Che version is providing a minimal support of TypeScript.
The goal of this issue is to provide support of TypeScript by using a langage server which would allow:

• Code Completion
• Errors and syntax highlighting
• Formatting
• Refactoring
• Code navigation

Linked issues and discussions

#550
#3741

Important to follow:

• TSServer: https://github.com/Microsoft/TypeScript/wiki/Standalone-Server-(tsserver)
• Work on Feature request: add general support for the Language Server Protocol dense-analysis/ale#517

[StevenDoesStuffs]

So, exactly what's left to be implmented? I've read #550 which says Che already uses https://github.com/sourcegraph/javascript-typescript-langserver, so I'm guessing some of those things on that list are already done. It would be nice to have a checklist.

[TylerJewell]

@slemeur - why is this an epic? Please make sure that there are sub-issues, or just convert this to an enhancement request.

[slemeur]

Fixed by: #7079