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

<!DOCTYPE html>
<html lang='en'><head>
	<meta charset="utf-8">
	<meta name="viewport" content="width=device-width, minimum-scale=1, maximum-scale=1"><meta http-equiv='content-type' content='text/html; charset=UTF-8' /></head><body>
<div data-role="page">
        <div data-role="header">
				<h1>.prev()</h1>
  				
</div>
<div data-role="content" data-theme="c" id="prev1">
<h2 class="jq-clearfix roundTop section-title">
<span class="name">.prev( [ 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>Get the immediately preceding sibling of each element in the set of matched elements, optionally filtered by a selector.</p>
<ul class="signatures"><li class="signature" id="prev-selector">
<h4 class="name">
<span class="versionAdded">version added: <a href="/category/version/1.0/">1.0</a></span>.prev( [ selector ] )</h4>
<p class="arguement"><strong>selector</strong>A string containing a selector expression to match elements against.</p>
</li></ul>
<div class="longdesc">
<p>Given a jQuery object that represents a set of DOM elements, the <code>.prev()</code> method allows us to search through the predecessors of these elements in the DOM tree and construct a new jQuery object from the matching elements.</p>
<p>The method optionally accepts a selector expression of the same type that we can pass to the <code>$()</code> function. If the selector is supplied, the elements will be filtered by testing whether they match it.</p>
<p>Consider a page with a simple list on it:</p>
<pre>
&lt;ul&gt;
   &lt;li&gt;list item 1&lt;/li&gt;
   &lt;li&gt;list item 2&lt;/li&gt;
   &lt;li class="third-item"&gt;list item 3&lt;/li&gt;
   &lt;li&gt;list item 4&lt;/li&gt;
   &lt;li&gt;list item 5&lt;/li&gt;
&lt;/ul&gt;
</pre>
<p>If we begin at the third item, we can find the element which comes just before it:</p>
<pre>$('li.third-item').prev().css('background-color', 'red');</pre>
<p>The result of this call is a red background behind item 2. Since we do not supply a selector expression, this preceding element is unequivocally included as part of the object. If we had supplied one, the element would be tested for a match before it was included.</p>
</div>
<h3>Examples:</h3>
<div id="entry-examples" class="entry-examples">
<div id="example-0">
<h4>Example: <span class="desc">Find the very previous sibling of each div.</span>
</h4>
<pre><code class="example demo-code">&lt;!DOCTYPE html&gt;
&lt;html&gt;
&lt;head&gt;
  &lt;style&gt;
  div { width:40px; height:40px; margin:10px;
        float:left; border:2px blue solid; 
        padding:2px; }
  span { font-size:14px; }
  p { clear:left; margin:10px; }
  &lt;/style&gt;
  &lt;script src="http://code.jquery.com/jquery-latest.js"&gt;&lt;/script&gt;
&lt;/head&gt;
&lt;body&gt;
	&lt;div&gt;&lt;/div&gt;
  &lt;div&gt;&lt;/div&gt;
  &lt;div&gt;&lt;span&gt;has child&lt;/span&gt;&lt;/div&gt;

  &lt;div&gt;&lt;/div&gt;
  &lt;div&gt;&lt;/div&gt;
  &lt;div&gt;&lt;/div&gt;
  &lt;div id="start"&gt;&lt;/div&gt;

  &lt;div&gt;&lt;/div&gt;
  &lt;p&gt;&lt;button&gt;Go to Prev&lt;/button&gt;&lt;/p&gt;
&lt;script&gt;
    var $curr = $("#start");
    $curr.css("background", "#f99");
    $("button").click(function () {
      $curr = $curr.prev();
      $("div").css("background", "");
      $curr.css("background", "#f99");
    });

&lt;/script&gt;
&lt;/body&gt;
&lt;/html&gt;</code></pre>
<h4>Demo:</h4>
<div class="demo code-demo"></div>
</div>
<div id="example-1">
<h4>Example: <span class="desc">For each paragraph, find the very previous sibling that has a class "selected".</span>
</h4>
<pre><code class="example demo-code">&lt;!DOCTYPE html&gt;
&lt;html&gt;
&lt;head&gt;
  &lt;script src="http://code.jquery.com/jquery-latest.js"&gt;&lt;/script&gt;
&lt;/head&gt;
&lt;body&gt;
	&lt;div&gt;&lt;span&gt;Hello&lt;/span&gt;&lt;/div&gt;

  &lt;p class="selected"&gt;Hello Again&lt;/p&gt;
  &lt;p&gt;And Again&lt;/p&gt;
&lt;script&gt;$("p").prev(".selected").css("background", "yellow");&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>`
set utf-8 2010-11-02 01:46:29 +00:00			`<html lang='en'><head>`
Added viewport meta elements to the markup of every template and removed the metaViewportContent option from code and docs. IE does not support generated viewport tags. 2011-02-18 20:00:18 +00:00			`<meta charset="utf-8">`
			`<meta name="viewport" content="width=device-width, minimum-scale=1, maximum-scale=1"><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>.prev()</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="prev1">`
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">.prev( [ 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>Get the immediately preceding sibling of each element in the set of matched elements, optionally filtered by a selector.</p>`
			`<ul class="signatures"><li class="signature" id="prev-selector">`
			`<h4 class="name">`
			`<span class="versionAdded">version added: <a href="/category/version/1.0/">1.0</a></span>.prev( [ selector ] )</h4>`
			`<p class="arguement"><strong>selector</strong>A string containing a selector expression to match elements against.</p>`
			`</li></ul>`
			`<div class="longdesc">`
			`<p>Given a jQuery object that represents a set of DOM elements, the <code>.prev()</code> method allows us to search through the predecessors of these elements in the DOM tree and construct a new jQuery object from the matching elements.</p>`
			`<p>The method optionally accepts a selector expression of the same type that we can pass to the <code>$()</code> function. If the selector is supplied, the elements will be filtered by testing whether they match it.</p>`
			`<p>Consider a page with a simple list on it:</p>`
			`<pre>`
			`<ul>`
			`<li>list item 1</li>`
			`<li>list item 2</li>`
			`<li class="third-item">list item 3</li>`
			`<li>list item 4</li>`
			`<li>list item 5</li>`
			`</ul>`
			`</pre>`
			`<p>If we begin at the third item, we can find the element which comes just before it:</p>`
			`<pre>$('li.third-item').prev().css('background-color', 'red');</pre>`
			`<p>The result of this call is a red background behind item 2. Since we do not supply a selector expression, this preceding element is unequivocally included as part of the object. If we had supplied one, the element would be tested for a match before it was included.</p>`
			`</div>`
			`<h3>Examples:</h3>`
			`<div id="entry-examples" class="entry-examples">`
			`<div id="example-0">`
			`<h4>Example: <span class="desc">Find the very previous sibling of each div.</span>`
			`</h4>`
			`<pre><code class="example demo-code"><!DOCTYPE html>`
			`<html>`
			`<head>`
			`<style>`
			`div { width:40px; height:40px; margin:10px;`
			`float:left; border:2px blue solid;`
			`padding:2px; }`
			`span { font-size:14px; }`
			`p { clear:left; margin:10px; }`
			`</style>`
			`<script src="http://code.jquery.com/jquery-latest.js"></script>`
			`</head>`
			`<body>`
			`<div></div>`
			`<div></div>`
			`<div><span>has child</span></div>`

			`<div></div>`
			`<div></div>`
			`<div></div>`
			`<div id="start"></div>`

			`<div></div>`
			`<p><button>Go to Prev</button></p>`
			`<script>`
			`var $curr = $("#start");`
			`$curr.css("background", "#f99");`
			`$("button").click(function () {`
			`$curr = $curr.prev();`
			`$("div").css("background", "");`
			`$curr.css("background", "#f99");`
			`});`

			`</script>`
			`</body>`
			`</html></code></pre>`
			`<h4>Demo:</h4>`
			`<div class="demo code-demo"></div>`
			`</div>`
			`<div id="example-1">`
			`<h4>Example: <span class="desc">For each paragraph, find the very previous sibling that has a class "selected".</span>`
			`</h4>`
			`<pre><code class="example demo-code"><!DOCTYPE html>`
			`<html>`
			`<head>`
			`<script src="http://code.jquery.com/jquery-latest.js"></script>`
			`</head>`
			`<body>`
			`<div><span>Hello</span></div>`

			`<p class="selected">Hello Again</p>`
			`<p>And Again</p>`
			`<script>$("p").prev(".selected").css("background", "yellow");</script>`
			`</body>`
			`</html></code></pre>`
			`<h4>Demo:</h4>`
			`<div class="demo code-demo"></div>`
			`</div>`
			`</div>`
			`</div>`
			`</div>`

			`</div>`

			`</body></html>`