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Built with the PWABuilder PWA Starter

Welcome to PWABuilder v3.0! Read our launch blog here for all the details!

Try It

Want to help us build PWABuilder? Check out the info below and our developer's wiki to get started!


You will need the following things properly installed on your computer.

You should also be familiar with TypeScript which we use for this project. This helps give you more guidance as you code from intellisense when using VSCode.

Recommended Development setup

We recommend the following tools for your dev setup:

Additionally, when you open the project in VS Code, you'll be prompted to install recommended extensions.



npm install
and then run
npm run dev
, the project should open in your default browser. From here you can start developing, your changes will be rebuilt and reloaded in the browser as you develop.

Running Tests

We currently have E2E tests that are run using the Playwright test-runner. Currently they can be run by running the following commands: - npm run dev (We are going to run the E2E tests on your latest local changes) - npm run test (This will make sure the needed dependences are installed and will start running the tests)

The output of the tests can be found in the console.

Notes - If a test fails it will retry twice. The reason this is needed is our tests are relying on network requests, of which many are happening at once as tests run which can cause false positives. - Playwright spins up workers for tests to try to spread the load on your CPU and avoid false positives. I have set this to 2 when running in a CI (recommended), when running locally it will use your number of CPU cores - 1. So on a Surface Pro X with 8 cores it will attempt to spin up 7 workers. - I have also set a timeout of a minute for each test.

Debugging in VS Code

In VS Code, install Debugger for Microsoft Edge extension.

In VSCode, set a breakpoint in a TypeScript file. Then press F5 to launch debugging.

Building for Production


npm run build
, the
folder will contain your built PWA. The production build will also generate a pre-caching service worker using Workbox.

Folder Structure

│ (docs)
│   rollup.config.js (bundler config
|   tsconfig.json (TypeScript config
|   pwabuilder-sw.js (Service Worker
|   package.json (
|   package-lock.json (
|   manifest.json (web manifest
| (index.html file used for production builds)
|   index.html (index.html for dev builds)
|   *note*: The registers a service worker which caches assets, so index.html is used for dev builds
|   .gitignore (git config file
└───src (most of your development will happen here)
│   │   global.css (used for global CSS styles and CSS variables)
│   │
│   └───script
│       │
│       |
|       └───components
|           |   header.ts (header component)
|           |   more components
|       |
|       |
|       └───pages
|           |   app-index.ts (app-index component)
|           |   app-home.ts (app-home component)
|           |   app-about.ts (app-about component)
|           |   more pages

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