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[labs/vscode-extension] Load the tsserver-plugin in the extension #5048

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Merged
justinfagnani merged 1 commit into from
Aug 21, 2025
Merged

[labs/vscode-extension] Load the tsserver-plugin in the extension #5048

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2 changes: 2 additions & 0 deletions .changeset/moody-eyes-wave.md
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Original file line number Diff line number Diff line change
@@ -0,0 +1,2 @@
---
---
3 changes: 2 additions & 1 deletion .vscode/launch.json
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Expand Up @@ -17,7 +17,8 @@
"type": "extensionHost",
"request": "launch",
"args": [
"--extensionDevelopmentPath=${workspaceFolder}/packages/labs/vscode-extension"
"--extensionDevelopmentPath=${workspaceFolder}/packages/labs/vscode-extension",
"--disable-extensions"
],
"outFiles": [
"${workspaceFolder}/packages/labs/vscode-extension/out/**/*.{js|cjs}"
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3 changes: 2 additions & 1 deletion package-lock.json
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3 changes: 3 additions & 0 deletions packages/labs/tsserver-plugin/src/index.cts
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Expand Up @@ -9,6 +9,9 @@ const init: ts.server.PluginModuleFactory & {loadedPromise: Promise<void>} = ({
create(info: ts.server.PluginCreateInfo) {
const {logger} = info.project.projectService;

// TODO (justinfagnani): Figure out where this logs to or remove.
console.log('tsserver-plugin create()');

// eslint-disable-next-line @typescript-eslint/no-explicit-any
if ((info.languageService as any)[litLanguageServiceApplied] === true) {
logger.info(
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21 changes: 17 additions & 4 deletions packages/labs/vscode-extension/package.json
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Expand Up @@ -12,7 +12,12 @@
"Snippets",
"Linters"
],
"activationEvents": [],
"activationEvents": [
"onLanguage:javascript",
"onLanguage:javascriptreact",
"onLanguage:typescript",
"onLanguage:typescriptreact"
],
"main": "./extension.cjs",
"contributes": {
"configuration": {
Expand All @@ -24,6 +29,12 @@
"command": "lit.hello",
"title": "Hello Lit"
}
],
"typescriptServerPlugins": [
{
"name": "@lit-labs/tsserver-plugin",
"enableForWorkspaceTypeScriptVersions": true
}
]
},
"scripts": {
Expand All @@ -36,7 +47,8 @@
"test:vscode": "wireit"
},
"dependencies": {
"@lit-labs/analyzer": "^0.13.2"
"@lit-labs/analyzer": "^0.13.2",
"@lit-labs/tsserver-plugin": "^0.0.1"
},
"devDependencies": {
"@types/node": "^22.17.0",
Expand All @@ -48,10 +60,11 @@
"build": {
"command": "tsc --pretty",
"dependencies": [
"../analyzer:build"
"../analyzer:build",
"../tsserver-plugin:build"
],
"files": [
"src/**/*.ts",
"src/**/*.{ts,cts}",
"tsconfig.json"
],
"output": [
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19 changes: 19 additions & 0 deletions packages/labs/vscode-extension/src/lib/lit-extension.ts
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Expand Up @@ -23,6 +23,25 @@ export class LitExtension {

const {context} = this;

// Begin: Try to force our tsserver-plugin to show diagnostics automatically
const extension = vscode.extensions.getExtension(
'vscode.typescript-language-features'
);
if (extension === undefined) {
logChannel.appendLine(
'Could not find vscode.typescript-language-features'
);
return;
}

await extension.activate();
if (extension.exports.getAPI) {
logChannel.appendLine('Configuring @lit-labs/tsserver-plugin');
const api = extension.exports.getAPI(0);
api.configurePlugin('@lit-labs/tsserver-plugin', {});
}
// End: Try to force our tsserver-plugin to show diagnostics automatically

// lit.hello command
const disposable = vscode.commands.registerCommand('lit.hello', () => {
logChannel.appendLine('lit.hello');
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