tsconfig.json

{
  "compilerOptions": {
    "target": "es2017",
    "module": "esnext",
    "lib": ["es2017", "dom", "dom.iterable"],
    "declaration": true,
    "declarationMap": true,
    "sourceMap": true,
    "inlineSources": true,
    "outDir": "dist",
    "rootDir": "src",
    "strict": true,
    "allowUnreachableCode": false,
    "noUnusedLocals": true,
    "noUnusedParameters": true,
    "noImplicitReturns": true,
    "noFallthroughCasesInSwitch": true,
    "noImplicitAny": true,
    "noImplicitThis": true,
    "moduleResolution": "node",
    "allowSyntheticDefaultImports": true,
    "experimentalDecorators": true,
    "forceConsistentCasingInFileNames": true,
    "useDefineForClassFields": false,
    "strictPropertyInitialization": false,
    "skipLibCheck": true,
    "resolveJsonModule": true,
    "jsx": "react",
    "jsxFactory": "h",
    "plugins": [
      {
        "name": "ts-lit-plugin",
        "strict": true
      }
    ]
  },
  "include": ["./src/**/*.ts", "./src/**/*/*.test.ts"],
  "exclude": []
}