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happy-dom

v15.11.6

Published

8 days ago

Happy DOM is a JavaScript implementation of a web browser without its graphical user interface. It includes many web standards from WHATWG DOM and HTML.

Downloads

4,626,012

0High
0Medium
0Low

jsdom dom browser custom elements web components html whatwg w3c

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

DOM Features

Custom Elements (Web Components)
Declarative Shadow DOM
Mutation Observer
Tree Walker
Fetch API

And much more..

Documentation

Documentation | Getting Started | Setup as Test Environment | GitHub

Works With

Vitest | Bun | Jest | Testing Library | Google LitElement | Vue | React | Svelte | Angular

Module Systems

Performance

| Operation | JSDOM | Happy DOM | | ------------------------------------ | ------- | --------- | | Import / Require | 333 ms | 45 ms | | Parse HTML | 256 ms | 26 ms | | Serialize HTML | 65 ms | 8 ms | | Render custom element | 214 ms | 19 ms | | querySelectorAll('tagname') | 4.9 ms | 0.7 ms | | querySelectorAll(':nth-child(2n+1)') | 10.4 ms | 3.8 ms |

See how the test was done here