tsconfig.json

{
  "compilerOptions": {
    /* Basic Options */
    "target": "esnext", /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017','ES2018' or 'ESNEXT'. */
    "module": "esnext", /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */
    "lib": [ /* Specify library files to be included in the compilation. */
      "esnext",
      "dom"
    ],
    "pretty": true,
    "jsx": "react", /* Specify JSX code generation: 'preserve', 'react-native', or 'react'. */
    "jsxFactory": "JSX.createElement", /* Specify JSX code generation: 'preserve', 'react-native', or 'react'. */
    /* Strict Type-Checking Options */
    "strict": true, /* Enable all strict type-checking options. */
    /* Additional Checks */
    "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. */
    /* Module Resolution Options */
    "typeRoots": [
      "node_modules/@types"
    ],
    /* Source Map Options */
    "sourceMap": true, /* Generates corresponding '.map' file. */
    /* Experimental Options */
    "experimentalDecorators": true, /* Enables experimental support for ES7 decorators. */
    "emitDecoratorMetadata": true, /* Enables experimental support for emitting type metadata for decorators. */
  }
}