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<!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">jQuery.type()</h1>
<div class="entry-meta jq-clearfix">
Categories:
<span class="category"><a href="http://api.jquery.com/category/utilities/" title="View all posts in Utilities">Utilities</a></span>
</div>
</div>
<div id="jQuery-type1" class="entry method">
<h2 class="jq-clearfix roundTop section-title">
<span class="name">jQuery.type( obj )</span> <span class="returns">Returns: <a class="return" href="http://api.jquery.com/Types/#String">String</a></span>
</h2>
<div class="jq-box roundBottom entry-details">
<p class="desc"><strong>Description: </strong>Determine the internal JavaScript [[Class]] of an object.</p>
<ul class="signatures"><li class="signature" id="jQuery-type-obj">
<h4 class="name">
<span class="versionAdded">version added: <a href="/category/version/1.4.3/">1.4.3</a></span>jQuery.type( obj )</h4>
<p class="arguement"><strong>obj</strong>Object to get the internal JavaScript [[Class]] of.</p>
</li></ul>
<div class="longdesc">
<p>A number of techniques are used to determine the exact return value for an object. The [[Class]] is determined as follows:</p>
<ul>
<li>If the object is undefined or null, then "undefined" or "null" is returned accordingly.</li>
<li>If the object has an internal [[Class]] equivalent to one of the browser's built-in objects, the associated name is returned. (<a href="http://perfectionkills.com/instanceof-considered-harmful-or-how-to-write-a-robust-isarray/">More details about this technique.</a>)<ul>
<li>jQuery.type(true) === "boolean"</li>
<li>jQuery.type(3) === "number"</li>
<li>jQuery.type("test") === "string"</li>
<li>jQuery.type(function(){}) === "function"</li>
<li>jQuery.type([]) === "array"</li>
<li>jQuery.type(new Date()) === "date"</li>
<li>jQuery.type(/test/) === "regexp"</li>
</ul>
</li>
<li>Everything else returns "object" as its type.</li>
</ul>
</div>
<h3>Example:</h3>
<div class="entry-examples" id="entry-examples"><div id="example-0">
<h4><span class="desc">Find out if the parameter is a RegExp.</span></h4>
<pre class="prettyprint"><code class="example demo-code"><!DOCTYPE html>
<html>
<head>
<script src="http://code.jquery.com/jquery-1.7rc2.js"></script>
</head>
<body>
Is it a RegExp? <b></b>
<script>$("b").append( "" + jQuery.type(/test/) );</script>
</body>
</html></code></pre>
<h4>Demo:</h4>
<div class="demo code-demo"></div>
</div></div>
</div>
</div>
</div>
</body></html>
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