验证Diffing算法

Tutorial: React基础 Category: React Published: 2026-04-07 13:58:26 Views: 20 Likes: 0 Comments: 0

30_验证Diffing算法

<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8" />
    <title>验证diff算法</title>
  </head>

  <body>
    <!-- 准备好一个"容器" -->
    <div id="test"></div>

    <!-- 引入react核心库 -->
    <script
      type="text/javascript"
      src="./js/17.0.1/react.development.js"
    ></script>

    <!-- 引入react-dom, 用于支持react操作DOM -->
    <script
      type="text/javascript"
      src="./js/17.0.1/react-dom.development.js"
    ></script>

    <!-- 引入babel, 用于将jsx转为js -->
    <script type="text/javascript" src="./js/17.0.1/babel.min.js"></script>

    <script type="text/babel">
      class Time extends React.Component {
        state = { date: new Date() };

        componentDidMount() {
          setInterval(() => {
            this.setState({
              date: new Date(),
            });
          }, 1000);
        }

        render() {
          return (
            <div>
              <h1>hello</h1>
              <input type="text" />
              <span>
                现在是：{this.state.date.toTimeString()}
                <input type="text" />
              </span>
            </div>
          );
        }
      }

      ReactDOM.render(<Time />, document.getElementById("test"));
    </script>
  </body>
</html>
Prev: getSnapshotBeforeUpdate的使用场景 Next: key的作用