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HTML onchange Event Attribute
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 −
<!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>
Output
Now change the value of drop-drown list to observe how onchange event triggered.
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