1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
|
<!DOCTYPE html>
<html lang='en'><head><meta http-equiv='content-type' content='text/html; charset=UTF-8' /></head><body>
<div class="entry-content">
<div class="entry-title roundTop">
<h1 class="jq-clearfix">.size()</h1>
<div class="entry-meta jq-clearfix">
Categories:
<span class="category"><a href="http://api.jquery.com/category/miscellaneous/" title="View all posts in Miscellaneous">Miscellaneous</a> > <a href="http://api.jquery.com/category/miscellaneous/dom-element-methods/" title="View all posts in DOM Element Methods">DOM Element Methods</a></span>
</div>
</div>
<div id="size1" class="entry method">
<h2 class="jq-clearfix roundTop section-title">
<span class="name">.size()</span> <span class="returns">Returns: <a class="return" href="http://api.jquery.com/Types/#Number">Number</a></span>
</h2>
<div class="jq-box roundBottom entry-details">
<p class="desc"><strong>Description: </strong>Return the number of elements in the jQuery object.</p>
<ul class="signatures"><li class="signature" id="size"><h4 class="name">
<span class="versionAdded">version added: <a href="/category/version/1.0/">1.0</a></span>.size()</h4></li></ul>
<div class="longdesc">
<p>The <code>.size()</code> method is functionally equivalent to the <code><a href="http://api.jquery.com/length/">.length</a></code> property; however, <strong>the <code>.length</code> property is preferred</strong> because it does not have the overhead of a function call.</p>
<p>Given a simple unordered list on the page:</p>
<pre>
<ul>
<li>foo</li>
<li>bar</li>
</ul>
</pre>
<p>Both <code>.size()</code> and <code>.length</code> identify the number of items:</p>
<pre>alert( "Size: " + $("li").size() );
alert( "Size: " + $("li").length );</pre>
<p>This results in two alerts:</p>
<p><span class="output">Size: 2</span></p>
<p><span class="output">Size: 2</span></p>
</div>
<h3>Example:</h3>
<div class="entry-examples" id="entry-examples"><div id="example-0">
<h4><span class="desc">Count the divs. Click to add more.</span></h4>
<pre class="prettyprint"><code class="example demo-code"><!DOCTYPE html>
<html>
<head>
<style>
body { cursor:pointer; min-height: 100px; }
div { width:50px; height:30px; margin:5px;
float:left; background:blue; }
span { color:red; }
</style>
<script src="http://code.jquery.com/jquery-1.7rc2.js"></script>
</head>
<body>
<span></span>
<div></div>
<script>
$(document.body)
.click(function() {
$(this).append( $("<div>") );
var n = $("div").size();
$("span").text("There are " + n + " divs. Click to add more.");
})
// trigger the click to start
.click();
</script>
</body>
</html></code></pre>
<h4>Demo:</h4>
<div class="demo code-demo"></div>
</div></div>
</div>
</div>
</div>
</body></html>
|
