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    1.7.0 • Public • Published

    </> htmx

    high power tools for HTML

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    htmx allows you to access AJAX, CSS Transitions, WebSockets and Server Sent Events directly in HTML, using attributes, so you can build modern user interfaces with the simplicity and power of hypertext

    htmx is small (~10k min.gz'd), dependency-free, extendable & IE11 compatible


    • 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

    quick start

      <!-- Load from unpkg -->
      <script src="" ></script>
      <!-- have a button POST a click via AJAX -->
      <button hx-post="/clicked" hx-swap="outerHTML">
        Click Me

    The hx-post and 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

    installing as a node package

    To install using npm:

    npm install --save

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

    website & docs


    • please write code, including tests, in ES5 for IE 11 compatibility
    • please include test cases in /test and docs in /www
    • if you are adding a feature, consider doing it as an extension instead to keep the core htmx code tidy
    • development pull requests should be against the dev branch, docs fixes can be made directly against master
    • No time? Then become a sponsor

    hacking guide

    To develop htmx locally, you will need to install the development dependencies. Use node 15 and run:

    npm install

    Then, run a web server in the root. This is easiest with Python:

    python3 -m http.server

    You can then run the test suite by navigating to:

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

    • /test/index.html - the root test page from which all other tests are included
    • /test/attributes - attribute specific tests
    • /test/core - core functionality tests
    • /test/core/regressions.js - regression tests
    • /test/ext - extension tests
    • /test/manual - manual tests that cannot be automated

    htmx uses the mocha testing framework, the chai assertion framework and sinon to mock out AJAX requests. They are all OK.


    javascript fatigue:
    longing for a hypertext
    already in hand



    npm i


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    BSD 2-Clause

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    • carsongross