HTML onwheel Event Attribute - HTML Mouse Events Attribute

The onwheel event attribute in HTML triggers a script when the wheel of a pointing device (like a mouse wheel) is rolled up or down over an element. It also fires when a user scrolls or zooms on an element using a touchpad.

Example of HTML onwheel Event Attribute

It Execute a JavaScript when the user rolls the mouse wheel over a <div> element.

index.html

Example: HTML

 <div onwheel="myFunction()">Roll the mouse wheel over me</div>

Output should be:

Definition and Usage of HTML onwheel Event Attribute

The onwheel attribute fires when the wheel of a pointing device is rolled up or down over an element.

The onwheel attribute also fires when the user scrolls or zooms on an element by using a touchpad (like the "mouse" of a laptop).

Browser Support of HTML onwheel Event Attribute

The numbers in the table specify the first browser version that fully supports the event attribute.

Syntax of HTML onwheel Event Attribute

<element onwheel="script">

Attribute Values of HTML onwheel Event Attribute

Value	Description
script	The script to be run on onwheel

Technical Details of HTML onwheel Event Attribute

Supported HTML tags:	All HTML elements

How to Execute a JavaScript when the user rolls the mouse wheel over a <div> element

This example demonstrates how to assign an "onwheel" event event to a DIV element. Roll the mouse wheel over me - either up or down!

A function is triggered when you roll the mouse wheel over div. The function sets the font-size of div to 35 pixels.

Note: The onwheel event is not supported in Internet Explorer or Safari.

index.html

Example: HTML

<!DOCTYPE html>
<html>
<head>
<style>
#myDIV {
  border: 1px solid black;
}
</style>
</head>
<body>

<div id="myDIV" onwheel="myFunction()">This example demonstrates how to assign an "onwheel" event event to a DIV element. Roll the mouse wheel over me - either up or down!</div>

<p>A function is triggered when you roll the mouse wheel over div. The function sets the font-size of div to 35 pixels.</p>

<p><strong>Note:</strong> The onwheel event is not supported in Internet Explorer or Safari.</p>

<script>
function myFunction() {
  document.getElementById("myDIV").style.fontSize = "35px";
}
</script>

</body>
</html>

Output should be:

html event attributes

Type:	Develop
Category:	Web Tutorial
Sub Category:	HTML Mouse Events Attribute
Uploaded by:	Admin

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