React使用highlight.js Clipboard.js实现代码高亮复制

npm install highlight.js clipboard --save

import hljs from 'highlight.js/lib/core';
// 导入需要的语言高亮
import java from 'highlight.js/lib/languages/java';
import csharp from 'highlight.js/lib/languages/csharp';
import php from 'highlight.js/lib/languages/php';
import python from 'highlight.js/lib/languages/python';
import objectivec from 'highlight.js/lib/languages/objectivec';
import bash from 'highlight.js/lib/languages/bash';
hljs.registerLanguage('java', java);
hljs.registerLanguage('csharp', csharp);
hljs.registerLanguage('php', php);
hljs.registerLanguage('python', python);
hljs.registerLanguage('objectivec', objectivec);
hljs.registerLanguage('bash', bash);
export default hljs;

import React, { useEffect, useRef, useState } from 'react';
import hljs from '../../highlight';
import Clipboard from 'clipboard';
import 'highlight.js/styles/default.css';
export default function CodeBlock({ language, code }) {
  const preRef = useRef(null);
  const [copied, setCopied] = useState(false);
  useEffect(() => {
    if (preRef.current) {
      hljs.highlightBlock(preRef.current);
      // 创建 clipboard 实例并保存到变量中
      const clipboard = new Clipboard(`#${language}copy_btn`, {
        text: () => code,
      });
      // 监听复制成功事件
      clipboard.on('success', () => {
        setCopied(true);
        setTimeout(() => setCopied(false), 2000);
      });
      // 销毁 clipboard 实例
      return () => {
        clipboard.destroy();
      };
    }
  }, [code]);
  return (
    <div className="code-block" style={{ position: 'relative', marginTop: 8 }}>
      <pre>
        <code id={language} ref={preRef} className={language}>
          [code]
        </code>
      </pre>
      <button id={`${language}copy_btn`} style={{ position: 'absolute', top: 4, right: 4, lineHeight: '14px' }} className="code-block__button" data-clipboard-target={`#${language}`} disabled={!preRef.current}>
        {copied ? '已复制' : '复制'}
      </button>
    </div>
  );
}

import React from 'react';
import CodeBlock from '../components/CodeBlock';
export default function BlogPost() {
  const code = `
    public static void main(String[] args) {
      System.out.println("Hello, World!");
    }
  `;
  return (
    <div>
      <h2>这是一篇博客文章</h2>
      <p>下面是一段 Java 代码：</p>
      <CodeBlock language="java" code=[code] />
    </div>
  );
}