Created
May 28, 2024 00:53
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Simplest preact app without any build step
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <title>Look ma, no build step</title> | |
| </head> | |
| <body> | |
| <div id="root"></div> | |
| <script type="module" src="./main.js"></script> | |
| </body> | |
| </html> |
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| // @ts-check | |
| /** @typedef {import("https://esm.sh/preact@10.22.0").VNode} VNode */ | |
| import { h, render } from "https://esm.sh/v128/preact@10.22.0" | |
| import { signal } from "https://esm.sh/@preact/signals@1.2.3?deps=preact@10.22.0" | |
| import htm from "https://esm.sh/htm@3.1.1" | |
| const html = | |
| /** @type {(strings: TemplateStringsArray, ...values: any[]) => VNode} */ ( | |
| htm.bind(h) | |
| ) | |
| /** @type {(props: { children: VNode }) => VNode} */ | |
| const Foo = ({ children }) => | |
| html` | |
| <div> | |
| <h1>Foo</h1> | |
| ${children} | |
| </div> | |
| ` | |
| const App = () => { | |
| const count = signal(0) | |
| return html` | |
| <div> | |
| <${Foo}> | |
| <p>Count: ${count}</p> | |
| <//> | |
| <button onClick=${() => count.value--}>Decrement</button> | |
| <button onClick=${() => count.value++}>Increment</button> | |
| </div> | |
| ` | |
| } | |
| const root = /**@type {HTMLElement} */ (document.querySelector("#root")) | |
| render(html`<${App} />`, root) |
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