tryjsref_text_required 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>
<body>
<form action="form_action.asp">
  姓名: <input type="text" id="myText" name="fname" required>
  <input type="submit">
</form>
<p>点击 "点我" 按钮查看文本域是否是表单提交的必填部分。</p>
<button onclick="myFunction()">点我</button>
<p id="demo"></p>
<script>
function myFunction() {
    var x = document.getElementById("myText").required;
    document.getElementById("demo").innerHTML = x;
}
</script>
</body>
</html>
 
 
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运行结果
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