onmouseover Event
Example
Execute a JavaScript when moving the mouse pointer onto an image:
<img onmouseover="bigImg(this)" src="smiley.gif" alt="Smiley">
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More examples below.
Definition and Usage
The onmouseover event occurs when the mouse pointer enters an element.
The onmouseover event is often used together with the
onmouseout event, which occurs when the mouse pointer leaves the element.
The onmouseover event is similar to the
onmouseenter event.
The difference is that the onmouseenter event does not bubble (does not propagate up the document hierarchy). See "More Examples" at the bottom of this page to better understand the differences.
Mouse Events
| Event | Occurs When |
|---|---|
| onclick | The user clicks on an element |
| oncontextmenu | The user right-clicks on an element |
| ondblclick | The user double-clicks on an element |
| onmousedown | A mouse button is pressed over an element |
| onmouseenter | The pointer is moved onto an element |
| onmouseleave | The pointer is moved out of an element |
| onmousemove | The pointer is moving over an element |
| onmouseout | The mouse pointer moves out of an element |
| onmouseover | The mouse pointer is moved over an element |
| onmouseup | The mouse button is released over an element |
See Also:
Tutorial:
Syntax
In JavaScript, using the addEventListener() method:
object.addEventListener("mouseover", myScript);
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Technical Details
| Bubbles: | Yes |
|---|---|
| Cancelable: | Yes |
| Event type: | MouseEvent |
| Supported HTML tags: | All HTML elements, EXCEPT: <base>, <bdo>, <br>, <head>, <html>, <iframe>, <meta>, <param>, <script>, <style>, and <title> |
| DOM Version: | Level 2 Events |
More Examples
Example
This example demonstrates the difference between the onmousemove, onmouseenter and mouseover events:
<div onmousemove="myMoveFunction()">
<p id="demo">I will demonstrate onmousemove!</p>
</div>
<div onmouseenter="myEnterFunction()">
<p id="demo2">I will demonstrate onmouseenter!</p>
</div>
<div onmouseover="myOverFunction()">
<p id="demo3">I will demonstrate onmouseover!</p>
</div>
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Browser Support
onmouseover is a DOM Level 2 (2001) feature.
It is fully supported in all browsers:
| Chrome | Edge | Firefox | Safari | Opera | IE |
| Yes | Yes | Yes | Yes | Yes | 9-11 |
