HTML DOM Select form 属性

HTML DOM select form 属性返回包含下拉列表的表单的引用。

语法

以下是语法 −

object.form

示例

让我们看一个 HTML DOM select form 属性的示例 −

活动演示

<!DOCTYPE html>
<html>
<head>
<style>
   body{
      text-align:center;
      background-color:#363946;
      color:#fff;
   }
   form{
      margin:2.5rem auto;
      border:1px solid #fff;
      padding:2rem;
   }
   .drop-down{
      display:block;
      width:35%;
      border:2px solid #fff;
      font-weight:bold;
      padding:2px;
      margin:1rem auto;
      outline:none;
   }
   button{
      background-color:#db133a;
      border:none;
      cursor:pointer;
      padding:8px 16px;
      color:#fff;
      border-radius:5px;
      font-size:1.05rem;
      outline:none;
   }
   .show{
      font-weight:bold;
      font-size:1.4rem;
   }
</style>
</head>
<body>
<h1>form Property Demo</h1>
<form id="Form 1">
<legend style="font-weight:bold;">Form 1</legend>
<p>Hi, Select your favourite subject:</p>
<select class='drop-down' name="Drop Down List">
<option>Physics</option>
<option>Maths</option>
<option>Chemistry</option>
<option>English</option>
<option>Economics</option>
<option>Hindi</option>
<option>Biology</option>
</select>
</form>
<button onclick="identify()">Identify form of drop-down</button>
<p class="show"></p>
<script>
   function identify() {
      var formId = document.querySelector(".drop-down").form.id;
      document.querySelector(".show").innerHTML = "Hi! I'm from " + formId;
   }
</script>
</body>
</html>