vscode/extensions/html-language-features/CONTRIBUTING.md

Setup

• Clone microsoft/vscode
• Run yarn at /, this will install
  • Dependencies for /extension/html-language-features/
  • Dependencies for /extension/html-language-features/server/
  • devDependencies such as gulp
• Open /extensions/html-language-features/ as the workspace in VS Code
• Run the Launch Extension debug target in the Debug View. This will:
  • Launch the preLaunchTask task to compile the extension
  • Launch a new VS Code instance with the html-language-features extension loaded
  • You should see a notification saying the development version of html-language-features overwrites the bundled version of html-language-features
• Test the behavior of this extension by editing html files
• Run Reload Window command in the launched instance to reload the extension

Contribute to vscode-html-languageservice

microsoft/vscode-html-languageservice contains the language smarts for html. This extension wraps the html language service into a Language Server for VS Code. If you want to fix html issues or make improvements, you should make changes at microsoft/vscode-html-languageservice.

However, within this extension, you can run a development version of vscode-html-languageservice to debug code or test language features interactively:

Linking vscode-html-languageservice in html-language-features/server/

• Clone microsoft/vscode-html-languageservice
• Run yarn in vscode-html-languageservice
• Run yarn link in vscode-html-languageservice. This will compile and link vscode-html-languageservice
• In html-language-features/server/, run npm link vscode-html-languageservice

Testing the development version of vscode-html-languageservice

• Open both vscode-html-languageservice and this extension in a single workspace with multi-root workspace feature
• Run yarn watch at html-languagefeatures/server/ to recompile this extension with the linked version of vscode-html-languageservice
• Make some changes in vscode-html-languageservice
• Now when you run Launch Extension debug target, the launched instance will use your development version of vscode-html-languageservice. You can interactively test the language features.
• You can also run the Debug Extension and Language Server debug target, which will launch the extension and attach the debugger to the language server. After successful attach, you should be able to hit breakpoints in both vscode-html-languageservice and html-language-features/server/