How do you install angular language service in the project?
You can install Angular Language Service in your project with the following npm command,
npm install --save-dev @angular/language-service
After that add the following to the "compilerOptions" section of your project's tsconfig.json
"plugins": [{"name": "@angular/language-service"}]
Note: The completion and diagnostic services works for .ts files only. You need to use custom plugins for supporting HTML files.