HTML DOM Select disabled 屬性

HTML DOM select disabled 屬性用於返回和修改 HTML 文件中的下拉列表是否已停用。

語法

以下是語法 -

返回 disabled

object.disabled

修改 disabled

object.disabled = true | false

示例

讓我們看一個 HTML DOM select disabled 屬性的示例 -

現場演示

<!DOCTYPE html>
<html>
<head>
<style>
   html{
      height:100%;
   }
   body{
      text-align:center;
      color:#fff;
      background: linear-gradient(62deg, #FBAB7E 0%, #F7CE68 100%) center/cover no-repeat;
      height:100%;
   }
   p{
      font-weight:700;
      font-size:1.2rem;
   }
   .drop-down{
      width:35%;
      border:2px solid #fff;
      font-weight:bold;
      padding:8px;
   }
   .btn{
      background:#0197F6;
      border:none;
      height:2rem;
      border-radius:2px;
      width:35%;
      margin:2rem auto;
      display:block;
      color:#fff;
      outline:none;
      cursor:pointer;
   }
   .show{
      font-size:1.5rem;
      font-weight:bold;
   }
</style>
</head>
<body>
<h1>DOM Select disabled Demo</h1>
<p>Hi, Select your favourite subject:</p>
<select class='drop-down'>
<option>Physics</option>
<option>Maths</option>
<option>Chemistry</option>
<option>English</option>
</select>
<button onclick="disEna()" class="btn">Disable/Enable</button>
<div class="show"></div>
<script>
   function disEna() {
      var dropDown = document.querySelector(".drop-down");
      var showMsg = document.querySelector(".show");
      showMsg.innerHTML ="";
      if (dropDown.disabled === true){
         dropDown.disabled = false;
         showMsg.innerHTML ="Previously, I was disabled but now I am enabled";
      }else{
         dropDown.disabled = true;
         showMsg.innerHTML ="Previously, I was enabled but now I am disabled";
      }
   }
</script>
</body>
</html>