artifacts/artifacts_react_test.html at main · veasion/artifacts · GitHub

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<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>React 实时编译渲染</title>
    <script src="https://unpkg.com/react@18/umd/react.development.js"></script>
    <script src="https://unpkg.com/react-dom@18/umd/react-dom.development.js"></script>
    <script src="https://unpkg.com/@babel/standalone/babel.min.js"></script>
    <style>
        .container { display: flex; height: 100vh; }
        .editor { width: 50%; padding: 20px; }
        .preview { width: 50%; padding: 20px; border-left: 1px solid #ccc; }
        textarea { width: 100%; height: 400px; font-family: monospace; }
        .counter { text-align: center; padding: 20px; }
        .buttons button { margin: 5px; padding: 8px 16px; }
    </style>
</head>
<body>
    <div class="container">
        <div class="editor">
            <h3>React 代码编辑器</h3>
            <textarea id="codeInput" placeholder="在这里输入 React 代码...">
import React, { useState } from 'react';

function App() {
  const [count, setCount] = useState(0);

  const increment = () => {
    setCount(count + 1);
  };

  const decrement = () => {
    setCount(count - 1);
  };

  const reset = () => {
    setCount(0);
  };

  return (
    <div>
      <h1>简单计数器</h1>
      <div className="counter">
        <h2>当前计数: {count}</h2>
        <div className="buttons">
          <button onClick={increment}>+1</button>
          <button onClick={decrement}>-1</button>
          <button onClick={reset}>重置</button>
        </div>
      </div>
    </div>
  );
}

export default App;
            </textarea>
            <button onclick="renderCode()">渲染代码</button>
        </div>
        <div class="preview">
            <h3>预览</h3>
            <div id="preview"></div>
        </div>
    </div>

    <script>
        let currentRoot = null;

        function rendering(root_element, react_code) {
            try {
                // 如果之前有渲染的内容，先卸载
                if (currentRoot) {
                    currentRoot.unmount();
                }

                // 清理 import 语句（浏览器环境不需要）
                const cleanedCode = react_code
                    .replace(/import\s+.*?from\s+['"][^'"]*['"];?\s*/g, '')
                    .replace(/export\s+default\s+\w+;?\s*$/, '');

                // 使用 Babel 转换 JSX
                const transformedCode = Babel.transform(cleanedCode, {
                    presets: ['react'],
                    plugins: []
                }).code;

                // 创建执行环境
                const executeCode = new Function(
                    'React',
                    'ReactDOM',
                    'useState',
                    'useEffect',
                    'useCallback',
                    'useMemo',
                    'useReducer',
                    'useContext',
                    `
                    ${transformedCode}
                    return App;
                    `
                );

                // 执行代码获取组件
                const AppComponent = executeCode(
                    React,
                    ReactDOM,
                    React.useState,
                    React.useEffect,
                    React.useCallback,
                    React.useMemo,
                    React.useReducer,
                    React.useContext
                );

                // 渲染组件
                currentRoot = ReactDOM.createRoot(root_element);
                currentRoot.render(React.createElement(AppComponent));

            } catch (error) {
                console.error('渲染失败:', error);
                root_element.innerHTML = `
                    <div style="color: red; padding: 20px; border: 1px solid red; border-radius: 4px;">
                        <h4>渲染错误:</h4>
                        <pre>${error.message}</pre>
                    </div>
                `;
            }
        }

        function renderCode() {
            const code = document.getElementById('codeInput').value;
            const preview = document.getElementById('preview');
            rendering(preview, code);
        }

        // 页面加载时自动渲染一次
        window.onload = function() {
            renderCode();
        };
    </script>
</body>
</html>