mouseover()

.mouseover( handler(eventObject) )

Returns: jQuery

Description: Bind an event handler to the "mouseover" JavaScript event, or trigger that event on an element.

.mouseover( handler(eventObject) )

version added: 1.0

handler(eventObject)

Function

A function to execute each time the event is triggered.

.mouseover( )

version added: 1.0

.mouseover( [ eventData ], handler(eventObject) )

version added: 1.4.3

eventData

Map

A map of data that will be passed to the event handler.

handler(eventObject)

Function

A function to execute each time the event is triggered.

This method is a shortcut for .bind('mouseover', handler) in the first variation, and .trigger('mouseover') in the second.

The mouseover event is sent to an element when the mouse pointer enters the element. Any HTML element can receive this event.

For example, consider the HTML:

<div id="outer">
  Outer
  <div id="inner">
    Inner
  </div>
</div>
<div id="other">
  Trigger the handler
</div>
<div id="log"></div>

The output of the code above will be:

Outer

Inner

Trigger the handler

The event handler can be bound to any element:

$('#outer').mouseover(function() {
  $('#log').append('<div>Handler for .mouseover() called.</div>');
});

Now when the mouse pointer moves over the Outer <div>, the message is appended to <div id="log">. We can also trigger the event when another element is clicked:

$('#other').click(function() {
  $('#outer').mouseover();
});

After this code executes, clicks on Trigger the handler will also append the message.

This event type can cause many headaches due to event bubbling. For instance, when the mouse pointer moves over the Inner element in this example, a mouseover event will be sent to that, then trickle up to Outer. This can trigger our bound mouseover handler at inopportune times. See the discussion for .mouseenter() for a useful alternative.

Examples

Show texts when mouseover and mouseout event triggering. Mouseover fires when the pointer moves into or out from child element, while mouseenter does't.

    var i = 0;
    $("div.overout").mouseover(function(){
      $("p:first",this).text("mouse over");
      $("p:last",this).text(++i);
    }).mouseout(function(){
      $("p:first",this).text("mouse out");
    });

    var n = 0;
    $("div.enterleave").bind("mouseenter",function(){
      $("p:first",this).text("mouse enter");
      $("p:last",this).text(++n);
    }).bind("mouseleave",function(){
      $("p:first",this).text("mouse leave");
    });

The output of the code above will be:

Try it yourself

Example - Full source:

<!DOCTYPE htmlgt;
<html>
<head>
<script src="http://code.jquery.com/jquery-latest.js"></script>
  <script type="text/javascript" language="javascript">
  $(document).ready(function(){
    var i = 0;
    $("div.overout").mouseover(function(){
      $("p:first",this).text("mouse over");
      $("p:last",this).text(++i);
    }).mouseout(function(){
      $("p:first",this).text("mouse out");
    });
    var n = 0;
    $("div.enterleave").bind("mouseenter",function(){
      $("p:first",this).text("mouse enter");
      $("p:last",this).text(++n);
    }).bind("mouseleave",function(){
      $("p:first",this).text("mouse leave");
    });
  });
  </script>
 <style>
div.out {
width:40%;
height:120px;
margin:0 15px;
background-color:#D6EDFC;
float:left;
}
div.in {
width:60%;
height:60%;
background-color:#FFCC00;
margin:10px auto;
}
p {
line-height:1em;
margin:0;
padding:0;
}
</style>
</head>
<body>
<div class="out overout"><p>move your mouse</p>
<div class="in overout"><p>move your mouse</p>
<p>0</p></div><p>0</p></div>
<div class="out enterleave"><p>move your mouse</p>
<div class="in enterleave"><p>move your mouse</p>
<p>0</p></div><p>0</p></div>
</body>
</html>

Try it yourself

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mouseover()

.mouseover( handler(eventObject) )

.mouseover( handler(eventObject) )

.mouseover( )

.mouseover( [ eventData ], handler(eventObject) )

Examples

Example - Full source:

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