<h1 id="hyperapp-npm"><a href="https://hyperapp.dev">Hyperapp</a> <a href="https://github.com/jorgebucaran/hyperapp/releases/latest"><img src="https://img.shields.io/npm/v/hyperapp.svg?label=&color=0080FF" alt="npm"></a></h1><blockquote>
<p>The tiny framework for building web interfaces.</p>
</blockquote><ul>
<li><strong>Do more with less</strong>—We have minimized the concepts you need to learn to be productive. Views, actions, effects, and subscriptions are all pretty easy to get to grips with and work together seamlessly.</li>
<li><strong>Write what, not how</strong>—With a declarative syntax that's easy to read and natural to write, Hyperapp is your tool of choice to develop purely functional, feature-rich, browser-based applications.</li>
<li><strong>Hypercharged</strong>—Hyperapp is a modern VDOM engine, state management solution, and application design pattern all-in-one. Once you learn to use it, there'll be no end to what you can do.</li>
</ul><p>To learn more, go to <a href="https://hyperapp.dev">https://hyperapp.dev</a> for documentation, guides, and examples.</p><h2 id="quickstart">Quickstart</h2><p>Install Hyperapp with npm or Yarn:</p><pre><code class="language-console">npm i hyperapp</code></pre><p>Then with a module bundler like <a href="https://parceljs.org">Parcel</a> or <a href="https://webpack.js.org">Webpack</a> import it in your application and get right down to business.</p><pre><code class="language-js">import { h, app } from "hyperapp"</code></pre><p>Don't want to set up a build step? Import Hyperapp in a <code><script></code> tag as a module. Don't worry; modules are supported in all evergreen, self-updating desktop, and mobile browsers.</p><pre><code class="language-html"><script type="module">
import { h, app } from "https://unpkg.com/hyperapp"
</script></code></pre><p>Here's the first example to get you started: a counter that can go up or down. You can try it online <a href="https://codesandbox.io/s/hyperapp-playground-fwjlo">here</a>.</p><pre><code class="language-html"><!DOCTYPE html>
<html lang="en">
<head>
<script type="module">
import { h, app } from "https://unpkg.com/hyperapp"
app({
init: 0,
view: state =>
h("main", {}, [
h("h1", {}, state),
h("button", { onClick: state => state - 1 }, "-"),
h("button", { onClick: state => state + 1 }, "+")
]),
node: document.getElementById("app")
})
</script>
</head>
<body>
<main id="app"></main>
</body>
</html></code></pre><p>The app starts off with <code>init</code> as the initial state. Our code doesn't explicitly maintain any state. Instead, we define actions to transform it and a view to visualize it. The view returns a plain object representation of the DOM known as a virtual DOM, and Hyperapp updates the real DOM to match it whenever the state changes.</p><p>Now it's your turn! Experiment with the code a bit. Spend some time thinking about how the view reacts to changes in the state. Can you add a button that resets the counter back to zero? Or how about multiple counters?</p><h2 id="help-im-stuck">Help, I'm stuck!</h2><p>We love to talk JavaScript and Hyperapp. If you've hit a stumbling block, hop on the <a href="https://hyperappjs.herokuapp.com">Hyperapp Slack</a> or drop by <a href="https://spectrum.chat/hyperapp">Spectrum</a> to get support, and if you don't receive an answer, or if you remain stuck, please file an issue, and we'll try to help you out.</p><p>Is anything wrong, unclear, missing? Help us <a href="https://github.com/jorgebucaran/hyperapp/fork">improve this page</a>.</p><h2 id="stay-in-the-loop">Stay in the loop</h2><ul>
<li><a href="https://twitter.com/hyperappjs">Twitter</a></li>
<li><a href="https://github.com/jorgebucaran/awesome-hyperapp">Awesome</a></li>
<li><a href="https://www.reddit.com/r/hyperapp">/r/hyperapp</a></li>
</ul><h2 id="license">License</h2><p><a href="/__/node_modules/hyperapp/LICENSE.html">MIT</a></p>
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