HTML DOM Textarea autofocus 属性

htmldomweb developmentfront end technology更新于 2025/11/29 20:28:17

HTML DOM Textarea 的 autofocus 属性用于返回并修改文本区域在页面加载时是否自动获得焦点。

语法

以下是语法 −

1. 返回 autofocus

object.autofocus

2. 修改 autofocus

object.autofocus = true | false

让我们看一个 HTML DOM Textarea autofocus 属性的示例:

示例

<!DOCTYPE html>
<html>
<style>
   body {
      color: #000;
      height: 100vh;
   }
   .btn {
      background: #db133a;
      border: none;
      height: 2rem;
      border-radius: 2px;
      width: 40%;
      display: block;
      color: #fff;
      outline: none;
      cursor: pointer;
   }
</style>
<body>
<h1>DOM Textarea autofocus Property Demo</h1>
<textarea autofocus>Hi! I'm a text area element with some dummy text.</textarea>
<button onclick="set()" class="btn">Disable Autofocus</button>
<script>
   function set() {
      document.querySelector("textarea").autofocus = false;
   }
</script>
</body>
</html>