https://github.com/capricorn86/happy-dom

A JavaScript implementation of a web browser without its graphical user interface
https://github.com/capricorn86/happy-dom

angular browser bun dom hacktoberfest hacktoberfest2025 html javascript jest lit-element lit-html nodejs react svelte testing-library typescript vitest vue web-components whatwg

Last synced: 3 months ago
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A JavaScript implementation of a web browser without its graphical user interface

• Host: GitHub
• URL: https://github.com/capricorn86/happy-dom
• Owner: capricorn86
• License: mit
• Created: 2019-09-09T19:53:08.000Z (almost 7 years ago)
• Default Branch: master
• Last Pushed: 2026-02-21T00:04:44.000Z (4 months ago)
• Last Synced: 2026-02-21T05:16:09.651Z (4 months ago)
• Topics: angular, browser, bun, dom, hacktoberfest, hacktoberfest2025, html, javascript, jest, lit-element, lit-html, nodejs, react, svelte, testing-library, typescript, vitest, vue, web-components, whatwg
• Language: TypeScript
• Homepage:
• Size: 11.6 MB
• Stars: 4,305
• Watchers: 13
• Forks: 286
• Open Issues: 262
• Metadata Files:
  • Readme: README.md
  • Contributing: docs/contributing.md
  • Funding: .github/FUNDING.yml
  • License: LICENSE
  • Code of conduct: CODE_OF_CONDUCT.md
  • Codeowners: .github/CODEOWNERS
  • Security: SECURITY.md

Awesome Lists containing this project

• awesome - capricorn86/happy-dom - A JavaScript implementation of a web browser without its graphical user interface (TypeScript)

README

          



    





    A JavaScript implementation of a web browser without its graphical user interface.





    

        

    





    Documentation | Getting started | Setup as Test Environment



## DOM Features

- Custom Elements (Web Components)

- Declarative Shadow DOM

- Mutation Observer

- Tree Walker

- Fetch API

And much more..

## Works With

 - [Vitest](https://vitest.dev/)

 - [Bun](https://bun.sh)

 - [Jest](https://jestjs.io/)

 - [Testing Library](https://testing-library.com/)

 - [Google LitElement](https://lit.dev/)

 - [Vue](https://vuejs.org/)

 - [React](https://reactjs.org)

 - [Svelte](https://svelte.dev/)

 - [Angular](https://angular.dev/)

## Sponsors

Sponsors




    

      

    



Backers




    

      

    

      

    



## Contributing

See [Contributing Guide](https://github.com/capricorn86/happy-dom/blob/master/docs/contributing.md).

## License

MIT License © 2019-Present [David Ortner](https://github.com/capricorn86)