Firebase Emulator UI

The web UI for Firebase Emulator Suite. Features include:

• Overview of Emulators running
• Firebase Realtime Database Data Viewer/Editor
• Cloud Firestore Data Viewer/Editor
• Logs Viewer with powerful filters

More on the blog post!

Usage

If you want to use the Emulator UI in your project, just simply follow the guide for installing and running the Emulator Suite.

Make sure you have Firebase CLI >= 8.4.0. (You may want to update if you already have Firebase CLI installed.) The Emulator UI will automatically start when you start the Emulator Suite.

Contributing

We welcome any issues and Pull Requests to improve the Emulator UI. The following instructions cover how to set up your dev environment for iterating on the Emulator UI itself.

(If you're looking forward to use the Emulator UI as a user, please refer to the Usage section above.)

Setting up your development environment

Clone the repo and install any dependencies:

git clone https://github.com/firebase/firebase-tools-ui.git
cd firebase-tools-ui
npm install # must be run the first time you clone

Start the Development Server

To run the development server with test data:

firebase emulators:exec --project demo-example --import test-data 'npm start'

This will run the web app in the development mode.
Open http://localhost:5173 to view it in the browser.

The page will reload if you make edits.
You will also see any lint errors in the console.

NOTE: The emulators:exec command is necessary to set the environment variables for the web app to talk to emulators.

Developing within a user project

You can also start the dev server of the Emulator UI and connect to your real project. To do so, first start the Emulator Suite in your project folder:

cd project/
firebase emulators:start --import my-data

✔  hub: emulator hub started at http://localhost:4400

This will run the emulators for your project.

In another terminal, run the Emulator Suite UI from the firebase-tools-ui folder: (note that <project-id> must be replaced with the matching project id of your project.)

cd firebase-tools-ui/
GCLOUD_PROJECT=<project-id> FIREBASE_EMULATOR_HUB=localhost:4400 npm start

Open http://localhost:5173 to view it in the browser. Note: The development server runs by default on port 5173, so please make sure you are visiting that URL instead of the production Emulator UI (which defaults on port 4000).

Developing features behind flags

Experimental CLI features that are activated/deactivated with the firebase experiments:enable command are surfaced to the UI via an environment variable. UI components can check if an experiment is active with the useExperiment hook:

function ExperimentalFeatureUI() {
  const showNewFeature = useExperiment("pineapple-smoothie");

  if (showNewFeature === true) {
    return <h1>Hi, I am an experimental feature</h1>;
  } else {
    return null;
  }
}

Other Available Scripts

In the project directory, you can run:

npm test

Launches the test runner in the interactive watch mode.

See the section about running tests for more information.

To run the test runner with emulators, use:

firebase emulators:exec --project demo-test 'npm test'

firebase emulators:exec --project demo-test --only firestore 'npm test AddCollectionDialog.test.tsx'

To disable the Jest interactive mode use the flag watchAll=false like so:

firebase emulators:exec --project demo-test --only firestore 'npm test -- --watchAll=false'

If you get port conflict errors, make sure to stop other instances of the Firebase Emulator Suite (e.g. the one you've started for the development server above) and try again.

npm run build

Builds the app for production, both server and web.

The web production build will be output to the dist/client folder.
It correctly bundles React in production mode and optimizes the build for the best performance. The build is minified and the filenames include the hashes.

The server code will be packed into dist/server/server.js, which is a standalone JS file including all dependencies, ready for execution with Node.js.

To run the production build with emulators, use:

firebase emulators:exec --project demo-example --import test-data 'node dist/server/server.js'

This will start a server that serves both the static files and APIs at http://localhost:5173/.

NOTE: The static files are not meant to be deployed to a website or CDN. They must be used in conjunction with the server as described above.

License

Apache-2.0 License
Copyright 2019-2021 Google LLC. All rights reserved.