tsconfig.json

{
    "compilerOptions": {
        "noEmit": true /* Most important thing: will not compile anything */,
        "jsx": "preserve" /* Do not compile your JSX */,
        "allowSyntheticDefaultImports": true /* To import without "* as" */,
        "alwaysStrict": true,
        "target": "ESNEXT",
        "strictNullChecks": true /* You have to add "| null" in your type when needed */,
        "strictFunctionTypes": true /* Enable strict checking of function types. */,
        "noImplicitThis": true /* Raise error on 'this' expressions with an implied 'any' type. */,
        "noUnusedLocals": true /* Report errors on unused locals. */,
        "noUnusedParameters": true /* Report errors on unused parameters. */,
        "noImplicitReturns": true /* Report error when not all code paths in function return a value. */,
        "noFallthroughCasesInSwitch": true /* Report errors for fallthrough cases in switch statement. */,
        "moduleResolution":
          "node" /* Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6). */,
        "module": "esnext",
        "baseUrl":
          "./src" /* Base directory to resolve non-absolute module names. */,
        "lib": ["es2016", "dom", "dom.iterable"]
    }
}