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HTML DOM Option index Property

HTML Web Development Front End Technology

The HTML DOM option index property returns and modify the index position of an option in the HTML document.

Syntax

Following is the syntax −

Returning index

object.index

Modifying index

object.index = “number”

Example

Let us see an example of HTML option index property −

Live Demo

<!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 Option index Demo</h1>
<p>i, 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>
</select>
<button onclick="showIndex()" class="btn">Show Index</button>
<div class="show"></div>
<script>
   function showIndex() {
      var dropDown=document.querySelector(".drop-down");
      var showMsg=document.querySelector(".show");
      showMsg.innerHTML="Selected option index is: "+dropDown.options[dropDown.selectedIndex].index;
   }
</script>
</body>
</html>