Position
Position an element relative to elements such as window, document, anchor, cursor/mouse, etc.
For more details about the .position() method, please view the API documentation .position().
Default function
Use form controls to configure the position, or drag the positioned element to modify its offset. Drag the parent element around to see collision detection.
Instance
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>jQuery UI 定位（Position） - 默认功能</title>
<link rel="stylesheet" href="//code.jquery.com/ui/1.10.4/themes/smoothness/jquery-ui.css">
<script src="//code.jquery.com/jquery-1.9.1.js"></script>
<script src="//code.jquery.com/ui/1.10.4/jquery-ui.js"></script>
<link rel="stylesheet" href="http://jqueryui.com/resources/demos/style.css">
<style>
#parent {
width: 60%;
height: 40px;
margin: 10px auto;
padding: 5px;
border: 1px solid #777;
background-color: #fbca93;
text-align: center;
}
.positionable {
position: absolute;
display: block;
right: 0;
bottom: 0;
background-color: #bcd5e6;
text-align: center;
}
#positionable1 {
width: 75px;
height: 75px;
}
#positionable2 {
width: 120px;
height: 40px;
}
select, input {
margin-left: 15px;
}
</style>
<script>
$(function() {
function position() {
$( ".positionable" ).position({
of: $( "#parent" ),
my: $( "#my_horizontal" ).val() + " " + $( "#my_vertical" ).val(),
at: $( "#at_horizontal" ).val() + " " + $( "#at_vertical" ).val(),
collision: $( "#collision_horizontal" ).val() + " " + $( "#collision_vertical" ).val()
});
}
$( ".positionable" ).css( "opacity", 0.5 );
$( "select, input" ).bind( "click keyup change", position );
$( "#parent" ).draggable({
drag: position
});
position();
});
</script>
</head>
<body>
<div id="parent">
<p>
这是父元素的位置。
</p>
</div>
<div class="positionable" id="positionable1">
<p>
to position
</p>
</div>
<div class="positionable" id="positionable2">
<p>
to position 2
</p>
</div>
<div style="padding: 20px; margin-top: 75px;">
定位...
<div style="padding-bottom: 20px;">
<b>my:</b>
<select id="my_horizontal">
<option value="left">left</option>
<option value="center">center</option>
<option value="right">right</option>
</select>
<select id="my_vertical">
<option value="top">top</option>
<option value="center">center</option>
<option value="bottom">bottom</option>
</select>
</div>
<div style="padding-bottom: 20px;">
<b>at:</b>
<select id="at_horizontal">
<option value="left">left</option>
<option value="center">center</option>
<option value="right">right</option>
</select>
<select id="at_vertical">
<option value="top">top</option>
<option value="center">center</option>
<option value="bottom">bottom</option>
</select>
</div>
<div style="padding-bottom: 20px;">
<b>collision:</b>
<select id="collision_horizontal">
<option value="flip">flip</option>
<option value="fit">fit</option>
<option value="flipfit">flipfit</option>
<option value="none">none</option>
</select>
<select id="collision_vertical">
<option value="flip">flip</option>
<option value="fit">fit</option>
<option value="flipfit">flipfit</option>
<option value="none">none</option>
</select>
</div>
</div>
</body>
</html>Run Instance»
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Image loop
A prototype of a photo browser, using Position to set the pictures to the left, middle, and right respectively, and then display them in a loop. Use the links at the top to cycle through the images, or click to the left or right of the image to cycle through the images. Note that when the window is resized, the image is repositioned.
Instance
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>jQuery UI 定位（Position） - 图像循环</title>
<link rel="stylesheet" href="//code.jquery.com/ui/1.10.4/themes/smoothness/jquery-ui.css">
<script src="//code.jquery.com/jquery-1.9.1.js"></script>
<script src="//code.jquery.com/ui/1.10.4/jquery-ui.js"></script>
<link rel="stylesheet" href="http://jqueryui.com/resources/demos/style.css">
<style>
body {
margin: 0;
}
#container {
overflow: hidden;
position: relative;
height: 400px;
}
img {
position: absolute;
}
</style>
<script>
$(function() {
// 重构部件，去除这些插件方法
$.fn.left = function( using ) {
return this.position({
my: "right middle",
at: "left+25 middle",
of: "#container",
collision: "none",
using: using
});
};
$.fn.right = function( using ) {
return this.position({
my: "left middle",
at: "right-25 middle",
of: "#container",
collision: "none",
using: using
});
};
$.fn.center = function( using ) {
return this.position({
my: "center middle",
at: "center middle",
of: "#container",
using: using
});
};
$( "img:eq(0)" ).left();
$( "img:eq(1)" ).center();
$( "img:eq(2)" ).right();
function animate( to ) {
$( this ).stop( true, false ).animate( to );
}
function next( event ) {
event.preventDefault();
$( "img:eq(2)" ).center( animate );
$( "img:eq(1)" ).left( animate );
$( "img:eq(0)" ).right().appendTo( "#container" );
}
function previous( event ) {
event.preventDefault();
$( "img:eq(0)" ).center( animate );
$( "img:eq(1)" ).right( animate );
$( "img:eq(2)" ).left().prependTo( "#container" );
}
$( "#previous" ).click( previous );
$( "#next" ).click( next );
$( "img" ).click(function( event ) {
$( "img" ).index( this ) === 0 ? previous( event ) : next( event );
});
$( window ).resize(function() {
$( "img:eq(0)" ).left( animate );
$( "img:eq(1)" ).center( animate );
$( "img:eq(2)" ).right( animate );
});
});
</script>
</head>
<body>
<div id="container">
<img src="/wp-content/uploads/2014/03/earth.jpg" width="458" height="308" alt="earth">
<img src="/wp-content/uploads/2014/03/flight.jpg" width="512" height="307" alt="flight">
<img src="/wp-content/uploads/2014/03/rocket.jpg" width="300" height="353" alt="rocket">
<a id="previous" href="#">上一个</a>
<a id="next" href="#">下一个</a>
</div>
</body>
</html>Run Instance»
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