tsconfig.json

{
  "compileOnSave": false,
  "compilerOptions": {
    /* Basic Options */
    "target": "es5" /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017','ES2018' or 'ESNEXT'. */,
    "module": "es6" /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */,
    "lib": ["dom", "es2015", "es2017"],
    "allowJs": true /* Allow javascript files to be compiled. */, // "checkJs": true,                       /* Report errors in .js files. */
    "moduleResolution": "node",
    /* Specify library files to be included in the compilation. */

    "jsx": "react" /* Specify JSX code generation: 'preserve', 'react-native', or 'react'. */,
    "sourceMap": true /* Generates corresponding '.map' file. */,

    /* Strict Type-Checking Options */
    "strict": true /* Enable all strict type-checking options. */,
    "noImplicitAny": true /* Raise error on expressions and declarations with an implied 'any' type. */,

    /* 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 */
    "allowSyntheticDefaultImports": true /* Allow default imports from modules with no default export. This does not affect code emit, just typechecking. */,

    "forceConsistentCasingInFileNames": true,
    "importHelpers": true,
    "removeComments": true
  },
  "include": ["./src/**/*"]
}