HTML onchange Event Attribute

HTML Web Development Front End Technology

The HTML onchange attribute is triggered when you change the value of an HTML element in an HTML document.

Syntax

Following is the syntax −

<tagname onchange=”script”></tagname>

Example

Let us see an example of HTML onchange event Attribute −

Live Demo

<!DOCTYPE html>
<html>
<head>
<style>
   body {
      color: #000;
      height: 100vh;
      background-color: #FBAB7E;
      background-image: linear-gradient(62deg, #FBAB7E 0%, #F7CE68 100%);
      text-align: center;
      padding: 20px;
   }
   .show {
      font-size: 1.1rem;
      margin: 1rem auto;
   }
   select {
      height: 2rem;
      width: 30%;
      font-size: 1rem;
      background: transparent;
      border: 2px solid #fff;
      outline: none;
   }
</style>
</head>
<body>
<h1>HTML onchange Event Attribute Demo</h1>
<p>Select your favourite subject:</p>
<select onchange="get()">
<option>Physics</option>
<option>Chemistry</option>
<option>Maths</option>
</select>
<div class="show"></div>
<script>
   function get() {
      var msg = document.querySelector('.show');
      msg.innerHTML = "Current Value is " + document.querySelector("select").value;
   }
</script>
</body>
</html>