hacky

⚙️ Hacky

<2kb tagged template alternative for Crank.js

Hacky is something that I've always wanted. I've used React previously, but I find hooks too magical and JSX a finicky process that requires a build step. When I discovered Crank.js, I fell in love because of how intuitive it was to understand. Imagine Hacky as Crank.js with tagged templates, but with a lightweight core and simplistic API.

Plug: Hacky is built on Million, a <1kb compiler-focused virtual DOM. It's fast!

random.cat API Example

Below is an implementation of a random.cat API fetcher example using Hacky (Live Demo).

import { html, render } from 'https://cdn.skypack.dev/hacky';

const fetchCat = async (url = 'https://aws.random.cat/meow') => {
  const res = await fetch(url);
  const { file } = await res.json();
  return file;
};

function* Cats({ width, height }) {
  const [cats, setCats] = this.createState([]);
  const [message, setMessage] = this.createState('Fetch cat image');
  const [disabled, setDisabled] = this.createState(false);

  const addCat = async () => {
    setMessage('Fetching...');
    setDisabled(true);

    try {
      const newCat = await fetchCat();
      setCats([...cats(), newCat]);
      setMessage('Fetch cat image');
      setDisabled(false);
    } catch (err) {
      console.error(err);
      setMessage('Failed to fetch. Retrying...');
      setTimeout(() => addCat(), 1000);
    }
  };

  while (true) {
    const catImages = cats().map(
      (cat) => html`<img key=${cat} src=${cat} width=${width} height=${height} />`,
    );
    yield html`
      <button disabled=${disabled()} onClick=${addCat} style="width: 100%">${message()}</button>
      <div>${catImages}</div>
    `;
  }
}

render(html`<${Cats} width=${100} height=${100} />`, document.body);

render() function has a standard interface that is used in many Virtual DOM libraries. First argument is a Virtual DOM to render, and the second one is a DOM node that will be used as the live DOM reference.

html tagged templates can produce Virtual DOM nodes, which define your DOM view.

this.createState() function will instantiate a new state reference, in which you can mutate by destructuring the getter (index 0) and setter (index 1).

Acknowledgments

Hacky takes heavy inspiration from Crank.js, and depends on Million. Feel free to check them out if you interested in an alternative library to use.

License

Million is MIT-licensed open-source software by Aiden Bai.