uni-app The TypeScript language service died 5 times

When you encounter the error “The TypeScript language service died 5 times” in uni-app, it typically indicates that the TypeScript language server is crashing repeatedly. This can be caused by various issues, such as misconfigurations, incompatible dependencies, or bugs in the TypeScript compiler or IDE. Below are some steps to troubleshoot and resolve the issue:

1. Check TypeScript Version

Ensure that the TypeScript version you’re using is compatible with your project and IDE. You can check the TypeScript version in your project by running:

npx tsc --version

If the version is outdated or incompatible, update it:

npm install typescript@latest --save-dev

2. Check IDE Configuration

If you’re using an IDE like Visual Studio Code (VSCode), ensure that it is configured correctly:

• Open the settings (Ctrl + , or Cmd + ,) and search for TypeScript.
• Make sure the correct TypeScript version is selected (workspace or globally installed).
• Disable any conflicting extensions or plugins.

3. Clear TypeScript Cache

Sometimes, the TypeScript cache can cause issues. Clear the cache by deleting the .tsbuildinfo file and restarting the IDE.

4. Check for Syntax Errors

Syntax errors or incorrect TypeScript configurations can crash the language service. Check your tsconfig.json file for any misconfigurations. A basic tsconfig.json for uni-app might look like this:

{
  "compilerOptions": {
    "target": "es5",
    "module": "esnext",
    "strict": true,
    "jsx": "preserve",
    "moduleResolution": "node",
    "esModuleInterop": true,
    "skipLibCheck": true,
    "forceConsistentCasingInFileNames": true
  },
  "include": ["src/**/*"]
}

5. Update Dependencies

Ensure all dependencies in your project are up to date. Run:

npm outdated

Update outdated packages:

npm update

6. Check for Conflicting Plugins

If you’re using uni-app with additional plugins or frameworks (e.g., Vue 3, Vite), ensure they are compatible with your TypeScript version. Some plugins may require specific TypeScript configurations.

7. Reinstall Node Modules

Corrupted or incomplete node_modules can cause issues. Delete the node_modules folder and package-lock.json file, then reinstall dependencies:

rm -rf node_modules package-lock.json
npm install

8. Check for Large Files

Large TypeScript files or projects can sometimes overwhelm the language service. If your project is large, consider splitting it into smaller modules or files.

9. Restart the IDE

Sometimes, simply restarting the IDE can resolve the issue. Close and reopen VSCode or your preferred editor.

10. Check for Known Issues

Search for known issues related to TypeScript and uni-app on GitHub or forums. There may be a bug or workaround available.

11. Reinstall TypeScript

If the issue persists, try reinstalling TypeScript:

npm uninstall typescript
npm install typescript --save-dev