tryjsref_number_readonly 在线代码实例

实例代码( Tip: 登录后体验更佳 )
运行代码

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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>W3Cschool教程(w3cschool.cn)</title>
</head>
<body>
<input type="number" id="myNumber" value="2">
<p>点击按钮设置 number 字段为只读。</p>
<p><strong>提示：</strong> 为了查看效果，你可以在点击按钮前或者后在输入框中输入数值。</p>
<button onclick="myFunction()">点我</button>
<p id="demo"></p>
<script>
function myFunction() {
    document.getElementById("myNumber").readOnly = true;
}
</script>
</body>
</html>
 
 
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运行结果
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