eclipse-theia/theia

Embedded languages lack IntelliSense

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#8,591 opened on Oct 5, 2020

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help wantedhtmlvscode

Description

Bug Description:

Languages that support embedded languages in an extension, when editing a part of a file where the embedded language is, IntelliSense doesn't work.

Steps to Reproduce:

  1. Create a HTML file.
  2. Add a SCRIPT tag.
  3. Add some JavaScript code in the tag.
  4. Initiate IntelliSense with Ctrl+Space, in VSCode the language Server is initiated and a list of attributes/functions are displayed, in theia it does not.

Additional Information

  • Operating System:
  • Theia Version:

Contributor guide

Tech stack
typescriptjavascript
Domain
developer experiencetooling
Issue type
bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-2 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
Language Server ProtocolTheia extension system
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
35
Research direction
Investigate the Theia language server client implementation in the `packages/plugin ext/` directory, focusing on how IntelliSense is triggered for embedded languages. Compare the behavior with VSCode's HTML extension to identify why JavaScript IntelliSense inside script tags is not being initiated. Look for any missing registration or configuration for embedded language scopes.