The .offset() method allows us to retrieve the current position of an element relative to the document. Contrast this with .position(), which retrieves the current position relative to the offset parent. When positioning a new element on top of an existing one for global manipulation (in particular, for implementing drag-and-drop), .offset() is more useful.
.offset() returns an object containing the properties top and left.
Note: jQuery does not support getting the offset coordinates of hidden elements or accounting for borders, margins, or padding set on the body element.
While it is possible to get the coordinates of elements with visibility:hidden set, display:none is excluded from the rendering tree and thus has a position that is undefined.
- The number returned by dimensions-related APIs, including
.offset(), may be fractional in some cases. Code should not assume it is an integer. Also, dimensions may be incorrect when the page is zoomed by the user; browsers do not expose an API to detect this condition.
Access the offset of the second paragraph:
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>offset demo</title>
<style>
p {
margin-left: 10px;
}
</style>
<script src="https://code.jquery.com/jquery-1.10.2.js"></script>
</head>
<body>
<p>Hello</p><p>2nd Paragraph</p>
<script>
var p = $( "p:last" );
var offset = p.offset();
p.html( "left: " + offset.left + ", top: " + offset.top );
</script>
</body>
</html>
Click to see the offset.
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>offset demo</title>
<style>
p {
margin-left: 10px;
color: blue;
width: 200px;
cursor: pointer;
}
span {
color: red;
cursor: pointer;
}
div.abs {
width: 50px;
height: 50px;
position: absolute;
left: 220px;
top: 35px;
background-color: green;
cursor: pointer;
}
</style>
<script src="https://code.jquery.com/jquery-1.10.2.js"></script>
</head>
<body>
<div id="result">Click an element.</div>
<p>
This is the best way to <span>find</span> an offset.
</p>
<div class="abs">
</div>
<script>
$( "*", document.body ).click(function( event ) {
var offset = $( this ).offset();
event.stopPropagation();
$( "#result" ).text( this.tagName +
" coords ( " + offset.left + ", " + offset.top + " )" );
});
</script>
</body>
</html>
The .offset() setter method allows us to reposition an element. The element's position is specified relative to the document. If the element's position style property is currently static, it will be set to relative to allow for this repositioning.
An object containing the properties top and left, which are numbers indicating the new top and left coordinates for the elements.
A function to return the coordinates to set. Receives the index of the element in the collection as the first argument and the current coordinates as the second argument. The function should return an object with the new top and left properties.
Set the offset of the second paragraph:
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>offset demo</title>
<style>
p {
margin-left: 10px;
}
</style>
<script src="https://code.jquery.com/jquery-1.10.2.js"></script>
</head>
<body>
<p>Hello</p><p>2nd Paragraph</p>
<script>
$( "p:last" ).offset({ top: 10, left: 30 });
</script>
</body>
</html>
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