HTML DOM Input Number form 属性

htmlweb developmentfront end technology更新于 2025/7/17 23:08:17

HTML DOM Input Number form 属性返回 HTML 文档中包含数字输入字段的表单的引用。

语法

以下是语法 −

object.form

示例

让我们看一个 HTML DOM 输入数字表单属性的示例 −

<!DOCTYPE html>
<html>
<head>
<style>
   body{
      text-align:center;
      background-color:#1b203a;
      color:#fff;
   }
   form{
      margin:2.5rem auto;
      border:1px solid #fff;
      padding:2rem;
   }
   button{
      background-color:#db133a;
      border:none;
      cursor:pointer;
      padding:8px 16px;
      color:#fff;
      border-radius:5px;
      font-size:1.05rem;
      outline:none;
   }
   input{
      border:none;
      background-color:#ffffff4a;
      height:1.2rem;
      padding:8px;
      color:#fff;
      font-weight:bold;
      font-size:1rem;
   }
   .show{
      font-weight:bold;
      font-size:1.4rem;
   }
</style>
</head>
<body>
<h1>form Property Demo</h1>
<form id="Form 1">
<legend>Form 1</legend>
<input type="number" class="numberInput" value="12345300">
</form>
<button onclick="identify()">Identify Number Input Field</button>
<p class="show"></p>
<script>
   function identify() {
      var formId = document.querySelector(".numberInput").form.id;
      document.querySelector(".show").innerHTML = "Hi! I'm from " + formId;
   }
</script>
</body>
</html>