{
  "include": ["./src/**/*"],
  "compilerOptions": {
    "target": "ES2018",    /* or at least ES2015 */
    "module": "ESNext",    /* or at least ES2015 */
    "lib": ["dom"],             /* <-- required! */
    "jsx": "preserve",          /* <-- required! */
    "moduleResolution": "node", /* <-- required! */

    /* for mixed ts/js codebase */
    "allowJS": true,
    "outDir": "./build"    /* this won't be used by ts-loader */
    /* other options... */
  }
}