jupyterlab/packages/services/examples/browser/tsconfig.json

{
  "compilerOptions": {
    "noImplicitAny": true,
    "noEmitOnError": true,
    "module": "commonjs",
    "moduleResolution": "node",
    "target": "ES5",
    "lib": ["dom", "es5", "es2015.collection", "es2015.promise"],
    "types": [],
    "outDir": "build"
  }
}