HTML DOM Input Number autofocus 属性

htmlweb developmentfront end technology更新于 2025/6/2 8:12:17

HTML DOM 输入数字自动聚焦属性返回并修改页面加载时输入数字字段是否应获得焦点。

语法

以下是语法 −

返回 autofocus

object.autofocus

2. 修改自动聚焦

object.autofocus = true | false

示例

让我们看一个 HTML DOM 输入数字自动聚焦属性的示例 −

<!DOCTYPE html>
<html>
<head>
<title>HTML DOM autofocus property</title>
<style>
   body{
      text-align:center;
      background-color:#1b203a;
      color:#ff8741;
   }
   p{
      font-size:1.2rem;
   }
   input{
      border:none;
      background-color:#ffffff4a;
      height:1.2rem;
      padding:8px;
      color:#fff;
      font-weight:bold;
      font-size:1rem;
   }
   button{
      background-color:#db133a;
      color:#fff;
      padding:8px;
      border:none;
      width:120px;
      margin:0.5rem;
      border-radius:50px;
      outline:none;
      cursor:pointer;
   }
</style>
</head>
<body>
<h1>autofocus Property Example</h1>
<p>Hi! click on disable button to disable autofocus</p>
<input type="number" autofocus value="23450004">
<br>
<button onclick="disable()">Disable</button>
   <script>
      function disable() {
         document.querySelector("input").autofocus = false;
      }
   </script>
</body>
</html>