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303 Stars 10 Forks MIT License 214 Commits 18 Opened issues


Chrome/Firefox DevTools extension for debugging Alpine.js applications.

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Alpine.js devtools

Screenshot of Alpine.js devtools

Alpine.js devtools is a simple extension to help you debug Alpine.js components easily.

This extension is heavily inspired by Vue devtools, but customized for a unique Alpine.js developer experience.


Note: if you are using Google Chrome, Alpine.js devtools will not work with local files unless you configure the extension to be allowed

Access to File URLs

You can allow it by following these steps:

  1. Open chrome settings
  2. Go to
  3. Choose
    Alpine.js devtools
    and press details
  4. Enable
    Allow access to file URLs

Allow access to file URLs permission

Identifying Components

Unlike other frameworks, Alpine does not include named components. Therefore by default, Alpine.js devtools will attempt to identify component names from the following attributes, in order:

(the function name),
, and finally the

You may also override these with either




  • Node ^14.x
  • npm ^6.x


  1. Clone this repo
  2. Run
    npm install
  3. Run
    npm run build:dev
    npm run build
    to test a production build)
  4. Load unpacked extension inside dist/chrome directory
  5. Open any HTML file that imports Alpine.js then inspect with Chrome DevTools. You should now have an Alpine.js panel available.


  1. Follow the Development instructions to get a development build.
  2. Go to about:debugging#/runtime/this-firefox in Firefox
  3. Ensure you are on the "This Firefox" tab (see the left side nav)
  4. Click "Load Temporary Add-on..."
  5. Open any of the files in the built extension folder (./dist/chrome)
  6. Open any HTML file that imports Alpine.js then inspect with Firefox DevTools. You should now have an Alpine.js panel available.

Running the Alpine.js devtools simulator

A devtools simulator is provided in order to run tests and have an easier development workflow.

Note that when using the simulator all Chrome/Firefox devtools/Extension APIs are faked so it's useful if working on the Extension Backend (which runs in the end user's window, see

) or the Alpine.js app which runs in the devtools panel (entrypoint:
  1. Clone this repo
  2. Run
    npm install
  3. Run
    npm start
  4. Open http://locahost:8080 (default port is 8080, you can override the port using the
    environment variable. eg.
    PORT=5000 npm start
    will start the simulator on http://localhost:5000)
  5. You'll see a page with our sample Alpine.js app, example.html, running in the top half of the screen and the devtools simulator running in the bottom half of the screen.


We have 2 levels of tests in the project:

  • unit tests in ./tests, written and run with uvu
    • The command to run them is
      npm test
  • E2E tests that run against the devtools simulator, in ./cypress, using Cypress.
    • The command to run Cypress tests is
      npm run cy:run
    • The command to open the Cypress UI is
      npm run cy:open
    • Note in order to run any Cypress tests, you'll need the simulator running (see Running the Alpine.js devtools simulator).


Code is auto-formatted using Prettier, see the config at .prettierrc.js.

On push, a GitHub Action will auto-format your changes.

On commit, there's a husky + lint-staged hook that runs and auto-formats your changes (unless you disable pre-commit hooks).



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