tsconfig.json

{
  "compilerOptions": {
    "target": "ES2020",
    "useDefineForClassFields": true,
    "module": "ESNext",
    "lib": ["ES2020", "DOM", "DOM.Iterable"],
    "skipLibCheck": true,

    /* Bundler mode */
    "moduleResolution": "bundler",
    "allowImportingTsExtensions": true,
    "resolveJsonModule": true,
    "isolatedModules": true,
    "noEmit": true,

    /* Linting */
    "strict": true,
    "noUnusedLocals": true,
    "noUnusedParameters": true,
    "noFallthroughCasesInSwitch": true,

    /* Type checking */
    "baseUrl": "src/",
    "strictNullChecks": false,
    "allowJs": true,
    "allowSyntheticDefaultImports": true,
    "declaration": false,
    "downlevelIteration": true,
    "esModuleInterop": true,
    "forceConsistentCasingInFileNames": true,
    "importHelpers": true,
    "noImplicitAny": false,
    "noImplicitReturns": true,
    "outDir": "./scratch",
    "rootDir": "./src",
    "sourceMap": false
  },
  "include": ["src", "src/**.d.ts"],
  "exclude": ["node_modules", "dist", "build", "cypress", "scratch"]
}