How to get rid of the warning .ts file is part of the TypeScript compilation but it's unused

Question

I Just updated angular to latest 9.0.0-next.4. I am not using routing but suddenly after updating I keep seeing this warning. How Do I remove this warning

Answer 1

Check your main tsconfig.app.json file.

and see whether you have following content inside,

{
  "extends": "./tsconfig.json",
  "compilerOptions": {
    "outDir": "./out-tsc/app",
    "types": []
  },
  "files": [
    "src/main.ts",
    "src/polyfills.ts"
  ],
  "include": [
    "src/**/*.d.ts"
  ]
}

Most likely, the lines to blame were this.

Add only entry points to the files or include properties in your tsconfig.

So, remove these lines should you have on your tsconfig.app.json. That's what the error is about :)

"exclude": [
    "src/test.ts",
    "**/*.spec.ts"
  ]

I hope this will help someone.

Thanks.