sp-dev-fx-webparts/samples/knockout-dependent-properties/config/config.json

{
  "entries": [
    {
      "entry": "./lib/webparts/depProps/DepPropsWebPart.js",
      "manifest": "./src/webparts/depProps/DepPropsWebPart.manifest.json",
      "outputPath": "./dist/dep-props.bundle.js"
    }
  ],
  "externals": {
    "knockout": "node_modules/knockout/build/output/knockout-latest.debug.js"
  },
  "localizedResources": {
    "depPropsStrings": "webparts/depProps/loc/{locale}.js"
  }
}