Angular 9 ngtypecheck

Question

After update to angular 9 i receives Warnings:

\src\main.ngtypecheck.ts is part of the TypeScript compilation but it's unused.
Add only entry points to the 'files' or 'include' properties in your tsconfig.
\src\polyfills.ngtypecheck.ts is part of the TypeScript compilation but it's unused.
Add only entry points to the 'files' or 'include' properties in your tsconfig.

my tsconfig.app.json:

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

How to solve these warnings?

Answer 1

@Felix If you're using @angular-builders/custom-webpack package, warnings are caused due to @ngtools/webpack v9 dependency

GitHub issue has been already opened