React 18 + TypeScript 在线编辑，实时预览、在线运行。

            
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            <!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>React App</title>
    <link rel="stylesheet" href="./style.css">
  </head>
  <body>
    <div id="root"></div>
    <script type="module" src="./main.tsx"></script>
  </body>
</html>

            
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            body {
  padding: 0;
  margin: 0;
  background-color: #fefefe;
  text-align: center;
}
.main {
  width: 100vw;
  height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
}

h1 {
  font-family: Inter, sans-serif;
}

i {
  color: #777;
}

            
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            import { createRoot } from "react-dom/client"
import App from "./app.tsx"

const root = createRoot(document.getElementById("root"))
root.render(<App />)

console.log(["Hello 笔.COOL 控制台"])

            
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            import { type MouseEvent } from "react"
import confetti from "canvas-confetti"

const App = () => {
  function onMouseMove(e: MouseEvent) {
    confetti({
      particleCount: 5,
      origin: {
        x: e.pageX / window.innerWidth,
        y: (e.pageY + 20) / window.innerHeight,
      }
    })
  }

  return (
    <div className="main" onMouseMove={onMouseMove}>
      <h1>Hello 笔.COOL</h1>
      <p><i>一笔一划，绘就人生；一码一境，酷创未来。</i></p>
      <svg xmlns="http://www.w3.org/2000/svg" width="48" height="48" viewBox="0 0 32 32"><circle cx="16" cy="15.974" r="2.5" fill="#007acc" /><path fill="#007acc" d="M16 21.706a28.4 28.4 0 0 1-8.88-1.2a11.3 11.3 0 0 1-3.657-1.958A3.54 3.54 0 0 1 2 15.974c0-1.653 1.816-3.273 4.858-4.333A28.8 28.8 0 0 1 16 10.293a28.7 28.7 0 0 1 9.022 1.324a11.4 11.4 0 0 1 3.538 1.866A3.4 3.4 0 0 1 30 15.974c0 1.718-2.03 3.459-5.3 4.541a28.8 28.8 0 0 1-8.7 1.191m0-10.217a28 28 0 0 0-8.749 1.282c-2.8.977-4.055 2.313-4.055 3.2c0 .928 1.349 2.387 4.311 3.4A27.2 27.2 0 0 0 16 20.51a27.6 27.6 0 0 0 8.325-1.13C27.4 18.361 28.8 16.9 28.8 15.974a2.33 2.33 0 0 0-1.01-1.573a10.2 10.2 0 0 0-3.161-1.654A27.5 27.5 0 0 0 16 11.489" /><path fill="#007acc" d="M10.32 28.443a2.64 2.64 0 0 1-1.336-.328c-1.432-.826-1.928-3.208-1.327-6.373a28.8 28.8 0 0 1 3.4-8.593a28.7 28.7 0 0 1 5.653-7.154a11.4 11.4 0 0 1 3.384-2.133a3.4 3.4 0 0 1 2.878 0c1.489.858 1.982 3.486 1.287 6.859a28.8 28.8 0 0 1-3.316 8.133a28.4 28.4 0 0 1-5.476 7.093a11.3 11.3 0 0 1-3.523 2.189a4.9 4.9 0 0 1-1.624.307m1.773-14.7a28 28 0 0 0-3.26 8.219c-.553 2.915-.022 4.668.75 5.114c.8.463 2.742.024 5.1-2.036a27.2 27.2 0 0 0 5.227-6.79a27.6 27.6 0 0 0 3.181-7.776c.654-3.175.089-5.119-.713-5.581a2.33 2.33 0 0 0-1.868.089A10.2 10.2 0 0 0 17.5 6.9a27.5 27.5 0 0 0-5.4 6.849Z" /><path fill="#007acc" d="M21.677 28.456c-1.355 0-3.076-.82-4.868-2.361a28.8 28.8 0 0 1-5.747-7.237a28.7 28.7 0 0 1-3.374-8.471a11.4 11.4 0 0 1-.158-4A3.4 3.4 0 0 1 8.964 3.9c1.487-.861 4.01.024 6.585 2.31a28.8 28.8 0 0 1 5.39 6.934a28.4 28.4 0 0 1 3.41 8.287a11.3 11.3 0 0 1 .137 4.146a3.54 3.54 0 0 1-1.494 2.555a2.6 2.6 0 0 1-1.315.324m-9.58-10.2a28 28 0 0 0 5.492 6.929c2.249 1.935 4.033 2.351 4.8 1.9c.8-.465 1.39-2.363.782-5.434A27.2 27.2 0 0 0 19.9 13.74a27.6 27.6 0 0 0-5.145-6.64c-2.424-2.152-4.39-2.633-5.191-2.169a2.33 2.33 0 0 0-.855 1.662a10.2 10.2 0 0 0 .153 3.565a27.5 27.5 0 0 0 3.236 8.1Z" /></svg>
    </div>
  )
}

export default App

            
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            {
  "dependencies": {
    "react": "18.3.1",
    "react-dom": "18.3.1",
    "canvas-confetti": "1.9.3"
  }
}