jquery-mobile/experiments/api-viewer/docs/has/index.html

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				<h1>.has()</h1>
  				
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<h2 class="jq-clearfix roundTop section-title">
<span class="name">.has( selector )</span> <span class="returns">Returns: <a class="return" href="http://docs.jquery.com/Types#jQuery">jQuery</a></span>
</h2>
<div class="  entry-details">
<p class="desc"><strong>Description: </strong>Reduce the set of matched elements to those that have a descendant that matches the selector or DOM element.</p>
<ul class="signatures">
<li class="signature" id="has-selector">
<h4 class="name">
<span class="versionAdded">version added: <a href="/category/version/1.4/">1.4</a></span>.has( selector )</h4>
<p class="arguement"><strong>selector</strong>A string containing a selector expression to match elements against.</p>
</li>
<li class="signature" id="has-contained">
<h4 class="name">
<span class="versionAdded">version added: <a href="/category/version/1.4/">1.4</a></span>.has( contained )</h4>
<p class="arguement"><strong>contained</strong>A DOM element to match elements against.</p>
</li>
</ul>
<div class="longdesc">
<p>Given a jQuery object that represents a set of DOM elements, the <code>.has()</code> method constructs a new jQuery object from a subset of the matching elements. The supplied selector is tested against the descendants of the matching elements; the element will be included in the result if any of its descendant elements matches the selector.</p>
<p>Consider a page with a nested list as follows:</p>
<pre>
 &lt;ul&gt;
  &lt;li&gt;list item 1&lt;/li&gt;
  &lt;li&gt;list item 2
    &lt;ul&gt;
      &lt;li&gt;list item 2-a&lt;/li&gt;
      &lt;li&gt;list item 2-b&lt;/li&gt;
    &lt;/ul&gt;
  &lt;/li&gt;
  &lt;li&gt;list item 3&lt;/li&gt;
  &lt;li&gt;list item 4&lt;/li&gt;
&lt;/ul&gt;
</pre>
<p>We can apply this method to the set of list items as follows:</p>
<pre>$('li').has('ul').css('background-color', 'red');</pre>
<p>The result of this call is a red background for item 2, as it is the only <code>&lt;li&gt;</code> that has a <code>&lt;ul&gt;</code> among its descendants.</p>
</div>
<h3>Example:</h3>
<div id="entry-examples" class="entry-examples"><div id="example-0">
<h4><span class="desc">Check if an element is inside another.</span></h4>
<pre><code class="example demo-code">&lt;!DOCTYPE html&gt;
&lt;html&gt;
&lt;head&gt;
  &lt;style&gt;
  .full { border: 1px solid red; }
&lt;/style&gt;
  &lt;script src="http://code.jquery.com/jquery-latest.js"&gt;&lt;/script&gt;
&lt;/head&gt;
&lt;body&gt;
	
&lt;ul&gt;&lt;li&gt;Does the UL contain an LI?&lt;/li&gt;&lt;/ul&gt;

&lt;script&gt;
  $("ul").append("&lt;li&gt;" + ($("ul").has("li").length ? "Yes" : "No") + "&lt;/li&gt;");
  $("ul").has("li").addClass("full");
&lt;/script&gt;
&lt;/body&gt;
&lt;/html&gt;</code></pre>
<h4>Demo:</h4>
<div class="demo code-demo"></div>
</div></div>
</div>
</div>

				</div>

</body></html>
added a jQuery api viewer demo. NOTE: content is a modified version of the downloadable HTML from http://jqapi.com 2010-09-16 17:13:38 +00:00			`<!DOCTYPE html>`
			`<html lang='en'><head><meta http-equiv='content-type' content='text/html; charset=UTF-8' /></head><body>`
Big update: In starting markup, pages should now be identified with the attribute data-role="page". This allows us to then add ui-page programatically, hiding all non-active pages, and apply ui-page-active to one page at a time to show it. mobile.js is updated to find pages by this attribute now, instead of ui-page class. fixes issue 32 2010-09-18 16:20:35 +00:00			`<div data-role="page">`
updated markup to use data-role attrs in place of classes for header/content/footer 2010-09-21 14:58:54 +00:00			`<div data-role="header">`
added a jQuery api viewer demo. NOTE: content is a modified version of the downloadable HTML from http://jqapi.com 2010-09-16 17:13:38 +00:00			`<h1>.has()</h1>`

			`</div>`
switched up padding and margins on content div. Now it will get 15px padding, unless its a fullscreen page. Inset listviews have no margin now, and regular listviews have -15px margins. Also, collapsibles now have no padding. Updated HTML to remove ui-body classes for content divs, to match these changes. Fixes #161 2010-10-12 19:50:28 +00:00			`<div data-role="content" data-theme="c" id="has1">`
added a jQuery api viewer demo. NOTE: content is a modified version of the downloadable HTML from http://jqapi.com 2010-09-16 17:13:38 +00:00			`<h2 class="jq-clearfix roundTop section-title">`
			`<span class="name">.has( selector )</span> <span class="returns">Returns: <a class="return" href="http://docs.jquery.com/Types#jQuery">jQuery</a></span>`
			`</h2>`
			`<div class=" entry-details">`
			`<p class="desc"><strong>Description: </strong>Reduce the set of matched elements to those that have a descendant that matches the selector or DOM element.</p>`
			`<ul class="signatures">`
			`<li class="signature" id="has-selector">`
			`<h4 class="name">`
			`<span class="versionAdded">version added: <a href="/category/version/1.4/">1.4</a></span>.has( selector )</h4>`
			`<p class="arguement"><strong>selector</strong>A string containing a selector expression to match elements against.</p>`
			`</li>`
			`<li class="signature" id="has-contained">`
			`<h4 class="name">`
			`<span class="versionAdded">version added: <a href="/category/version/1.4/">1.4</a></span>.has( contained )</h4>`
			`<p class="arguement"><strong>contained</strong>A DOM element to match elements against.</p>`
			`</li>`
			`</ul>`
			`<div class="longdesc">`
			`<p>Given a jQuery object that represents a set of DOM elements, the <code>.has()</code> method constructs a new jQuery object from a subset of the matching elements. The supplied selector is tested against the descendants of the matching elements; the element will be included in the result if any of its descendant elements matches the selector.</p>`
			`<p>Consider a page with a nested list as follows:</p>`
			`<pre>`
			`<ul>`
			`<li>list item 1</li>`
			`<li>list item 2`
			`<ul>`
			`<li>list item 2-a</li>`
			`<li>list item 2-b</li>`
			`</ul>`
			`</li>`
			`<li>list item 3</li>`
			`<li>list item 4</li>`
			`</ul>`
			`</pre>`
			`<p>We can apply this method to the set of list items as follows:</p>`
			`<pre>$('li').has('ul').css('background-color', 'red');</pre>`
			`<p>The result of this call is a red background for item 2, as it is the only <code><li></code> that has a <code><ul></code> among its descendants.</p>`
			`</div>`
			`<h3>Example:</h3>`
			`<div id="entry-examples" class="entry-examples"><div id="example-0">`
			`<h4><span class="desc">Check if an element is inside another.</span></h4>`
			`<pre><code class="example demo-code"><!DOCTYPE html>`
			`<html>`
			`<head>`
			`<style>`
			`.full { border: 1px solid red; }`
			`</style>`
			`<script src="http://code.jquery.com/jquery-latest.js"></script>`
			`</head>`
			`<body>`

			`<ul><li>Does the UL contain an LI?</li></ul>`

			`<script>`
			`$("ul").append("<li>" + ($("ul").has("li").length ? "Yes" : "No") + "</li>");`
			`$("ul").has("li").addClass("full");`
			`</script>`
			`</body>`
			`</html></code></pre>`
			`<h4>Demo:</h4>`
			`<div class="demo code-demo"></div>`
			`</div></div>`
			`</div>`
			`</div>`

			`</div>`

			`</body></html>`