[![</> htmx](https://raw.githubusercontent.com/bigskysoftware/htmx/master/www/static/img/htmx_logo.1.png "high power tools for HTML")](https://htmx.org)

*high power tools for HTML*

[![Discord](https://img.shields.io/discord/725789699527933952)](https://htmx.org/discord)
[![Netlify](https://img.shields.io/netlify/dba3fc85-d9c9-476a-a35a-e52a632cef78)](https://app.netlify.com/sites/htmx/deploys)
[![Bundlephobia](https://badgen.net/bundlephobia/dependency-count/htmx.org)](https://bundlephobia.com/result?p=htmx.org)
[![Bundlephobia](https://badgen.net/bundlephobia/minzip/htmx.org)](https://bundlephobia.com/result?p=htmx.org)

## introduction

htmx allows you to access  [AJAX](https://htmx.org/docs#issuing-requests--handling-responses), [CSS Transitions](https://htmx.org/docs#css-transitions),
[WebSockets](https://htmx.org/extensions/hx-ws) and [Server Sent Events](https://htmx.org/extensions/hx-sse)
directly in HTML, using [attributes](https://htmx.org/reference/attributes), so you can build
[modern user interfaces](https://htmx.org/patterns) with the [simplicity](https://en.wikipedia.org/wiki/HATEOAS) and
[power](https://www.ics.uci.edu/~fielding/pubs/dissertation/rest_arch_style.htm) of hypertext

htmx is small ([~12k min.gz'd](https://cdn.jsdelivr.net/npm/htmx.org/dist/)),
[dependency-free](https://github.com/bigskysoftware/htmx/blob/master/package.json) &
[extendable](https://htmx.org/extensions)

## motivation

* Why should only `<a>` and `<form>` be able to make HTTP requests?
* Why should only `click` & `submit` events trigger them?
* Why should only GET & POST be available?
* Why should you only be able to replace the *entire* screen?

By removing these arbitrary constraints htmx completes HTML as a
[hypertext](https://en.wikipedia.org/wiki/Hypertext)

## quick start

```html
  <script src="https://cdn.jsdelivr.net/npm/htmx.org@4.0.0/dist/htmx.min.js"
          integrity="sha384-BvJpBiO8Kh31EqtJe5DRIeWrHWnCGkwytKs9NKFi86Hhw96dEqdEMzZDeK9iEGTc"
          crossorigin="anonymous"></script>
  <!-- have a button POST a click via AJAX -->
  <button hx-post="/clicked" hx-swap="outerHTML">
    Click Me
  </button>
```

The [`hx-post`](https://htmx.org/reference/attributes/hx-post) and [`hx-swap`](https://htmx.org/reference/attributes/hx-swap) attributes tell htmx:

> When a user clicks on this button, issue an AJAX request to /clicked, and replace the entire button with the response

htmx is the successor to [intercooler.js](http://intercoolerjs.org)

### installing as a node package

To install using npm:

```
npm install htmx.org --save
```

Note there is an old broken package called `htmx`.  This is `htmx.org`.

## website & docs

* <https://htmx.org>
* <https://htmx.org/docs>

## contributing
Want to contribute? Check out our [contribution guidelines](dev/CONTRIBUTING.md)

No time? Then [become a sponsor](https://github.com/sponsors/bigskysoftware#sponsors)

### hacking guide

To develop htmx locally, you will need to install the development dependencies.

Run:

```
npm install
```

Then run the test suite:

```
npm test
```

At this point you can modify `/src/htmx.js` to add features, and then add tests in the appropriate area under `/test/tests`.

* `/test/tests/unit` - unit tests for individual functions
* `/test/tests/attributes` - attribute specific tests
* `/test/tests/end2end` - end-to-end tests
* `/test/tests/ext` - extension tests
* `/test/manual` - manual tests that cannot be automated

htmx uses [@web/test-runner](https://modern-web.dev/docs/test-runner/overview/) with [Playwright](https://playwright.dev/)
and the [chai](https://www.chaijs.com/) assertion framework.

## haiku

*javascript fatigue:<br/>
longing for a hypertext<br/>
already in hand*