tsconfig.app.json

{
    "compilerOptions": {
      "target": "ES2020",
      "experimentalDecorators": true,
      "useDefineForClassFields": false,
      "module": "ESNext",
      "lib": ["ES2020", "DOM", "DOM.Iterable"],
      "skipLibCheck": true,
  
      /* Bundler mode */
      "moduleResolution": "bundler",
      "allowImportingTsExtensions": true,
      "resolveJsonModule": true,
      "isolatedModules": true,
      "moduleDetection": "force",
      "noEmit": true,
  
      /* Linting */
      "strict": true,
      "noUnusedLocals": true,
      "noUnusedParameters": true,
      "noImplicitReturns": true,
      "noFallthroughCasesInSwitch": true,
      "noImplicitAny": true,
      "noImplicitThis": true,
      "noImplicitOverride": true,
  
      "plugins": [
        {
          "name": "ts-lit-plugin",
          "strict": true
        }
      ],
      "paths": {
        "@/*": ["./src/*"]
      }
    },
    "include": ["src"]
  }