sp-dev-fx-webparts/samples/react-graph-cascading-managed-metadata/fast-serve/config.json

{
  "$schema": "https://raw.githubusercontent.com/s-KaiNet/spfx-fast-serve/master/schema/config.latest.schema.json",
  "cli": {
    "isLibraryComponent": false
  },
  "serve": {
    "open": false
  }
}