Quickstart: Qwik

1 Initialize project

npm create vite@latest css-hooks-playground -- --template qwik-ts
cd css-hooks-playground
npm install && npm install @css-hooks/qwik

2 Start dev server

npm run dev

Visit http://localhost:5173 to view changes in real time.

3 Set up CSS Hooks

Create a src/css.ts module with the following contents:

import { createHooks } from "@css-hooks/qwik";

export const { styleSheet, css } = createHooks({
  hooks: {
    "&:active": "&:active",
  },
  debug: import.meta.env.DEV,
});

4 Add style sheet

Modify src/main.tsx to add the style sheet to the document:

import '@builder.io/qwik/qwikloader.js'

import { render } from '@builder.io/qwik'
import { App } from './app.tsx'
import './index.css'
import { styleSheet } from './css.ts'

render(document.getElementById('app') as HTMLElement, <App />)
render(
  document.getElementById('app') as HTMLElement,
  <>
    <style dangerouslySetInnerHTML={styleSheet()} />
    <App />
  </>
)

5 Add conditional style

Use the configured &:active hook to implement an effect when the counter button is pressed:

// src/app.tsx

import { component$, useSignal } from '@builder.io/qwik'

import qwikLogo from './assets/qwik.svg'
import viteLogo from '/vite.svg'
import './app.css'
import { css } from './css.ts'

export const App = component$(() => {
  const count = useSignal(0)

  return (
    <>
      <div>
        <a href="https://vitejs.dev" target="_blank">
          <img src={viteLogo} className="logo" alt="Vite logo" />
        </a>
        <a href="https://qwik.builder.io" target="_blank">
          <img src={qwikLogo} className="logo qwik" alt="Qwik logo" />
        </a>
      </div>
      <h1>Vite + Qwik</h1>
      <div className="card">
        <button onClick$={() => count.value++}>count is {count.value}</button>
        <button
          onClick$={() => count.value++}
          style={css({
            transition: "transform 75ms",
            on: $ => [
              $("&:active", {
                transform: "scale(0.9)"
              })
            ]
          })}
        >
          count is {count}
        </button>
      </div>
      <p className="read-the-docs">
        Click on the Vite and Qwik logos to learn more
      </p>
    </>
  )
})