• I’m sold! Where can I get it?
• Hello, World?
• Something more complex?

H3 is a microframework to build client-side single-page applications (SPAs) in modern JavaScript.

H3 is also:

• tiny, under 700 sloc.
• modern, in the sense that it runs only in modern browsers (latest versions of Chrome, Firefox, Edge & similar).
• easy to learn, its API is comprised of only seven methods and two properties.

I’m sold! Where can I get it? ⇈

Here, look, it’s just one file:

Download v0.11.0 (Keen Klingon)

Yes there is also a NPM package if you want to use it with WebPack and similar, but let me repeat: it’s just one file.

Hello, World? ⇈

Here’s an example of an extremely minimal SPA created with H3:

import { h3, h } from "./h3.js";
h3.init(() => h("h1", "Hello, World!"));

This will render a h1 tag within the document body, containing the text "Hello, World!".

Something more complex? ⇈

Have a look at the code of a simple todo list (demo) with several components, a store and some routing.