proxy 绑定第三遍 

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Proxy绑定第三遍</title>
  </head>
  <body>
    <input type="text" id="input" />
    <p id="show"></p>
    <script>
      const input = document.getElementById('input');
      const show = document.getElementById('show');
      let obj = {};
      let newObj = new Proxy(obj, {
        set(target, key, value) {
          if (key === 'text') {
            input.value = value;
            show.innerText = value;
          }
        },
        get(target, key) {
          return Reflect.get(target, key);
        }
      });
      input.addEventListener('keyup', function (e) {
        newObj.text = e.target.value;
      });
    </script>
  </body>
</html>

 

posted @ 2022-05-08 11:30  苹果π  阅读(11)  评论(0)  编辑  收藏  举报