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POjquery Uncaught TypeError: Cannot read property 'left' of undefined
 

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  1. POjquery Uncaught TypeError: Cannot read property 'left' of undefined
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    <p>Recently, I've made a lavalamp plugin based on a nettuts tutorial and it worked well on my other site. I wanted to reuse it with my other site but I'm getting this error:</p> <blockquote> <p>Uncaught TypeError: Cannot read property 'left' of undefined </p> </blockquote> <p>I am a beginner with jQuery and I can't really find out how to fix it.</p> <p>Code:</p> <pre><code>(function($){ $.fn.lavylamp = function(options) { options = $.extend({ overlay: 20, speend: 300, reset: 1500, color: '#78C2FF', easing: 'easeOutExpo', }, options); return this.each(function(){ var nav = $(this), currentPageItem = $('#active', nav), cursor, reset; $('&lt;li id="blob"&gt;&lt;/li&gt;').css({ width: currentPageItem.outerWidth(), left: currentPageItem.position().left, top: currentPageItem.position().top, backgroundColor: options.color, }).appendTo('#nav'); blob = $('#blob', nav); $('li', nav).hover(function(){ blob.animate( { left: $(this).position().left, width: $(this).width() }, { duration: options.speed, easing: options.spped, queue: false } ); }, function(){ clearTimeout(reset); blob.stop().animate({ left: $(this).position().left, width: $(this).width() }, options.speed); reset = setTimeout(function(){ blob.stop().animate({ width: $(this).outerWidth(), left: $(this).position().left, }, options.speed); }, options.reset); }); }); } })(jQuery); </code></pre> <p>And the error applies to this part:</p> <pre><code>$('&lt;li id="blob"&gt;&lt;/li&gt;').css({ width: currentPageItem.outerWidth(), left: currentPageItem.position().left, top: currentPageItem.position().top, backgroundColor: options.color, }).appendTo('#nav'); </code></pre> <p>Could someone please give me a hint?</p> <p><strong>EDIT</strong></p> <p>HTML</p> <pre><code>&lt;ul id="nav" class="unstyled inline"&gt; &lt;li&gt;&lt;a href=""&gt;Start up Business&lt;/a&gt;&lt;/li&gt; &lt;li&gt;&lt;a href="industries.php=2"&gt;Entrepreneurial &amp; Familit Owned Business&lt;/a&gt;&lt;/li&gt; &lt;li&gt;&lt;a href=""&gt;Hight Net Worth Individuals&lt;/a&gt;&lt;/li&gt; &lt;li&gt;&lt;a href="careers.php=1"&gt;Professionlas&lt;/a&gt;&lt;/li&gt; &lt;li&gt;&lt;a href="industries.php=8"&gt;Real Estate Professionlas&lt;/a&gt;&lt;/li&gt; &lt;li&gt;&lt;a href="industries.php=7"&gt;Not For Profit&lt;/a&gt;&lt;/li&gt; &lt;/ul&gt; </code></pre>
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    1. COAre you sure currentPageItem variable is not null ?
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    2. COShow the HTML and how you use the plugin.
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    3. CO@soderslatt you where right the currentPageItem was null thank you was able to fix it thanks so much
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