title: jQuery toggle - Uncaught TypeError: undefined is not a function
body: <p>i try to show one element of a class with this jquery code:</p>
  
  <pre><code>jQuery('.slide_cover').get(0).toggle(800);
  </code></pre>
  
  <p>but i get this error:</p>
  
  <pre><code>Uncaught TypeError: undefined is not a function 
  </code></pre>
  
  <p>and code lick this works fine: </p>
  
  <pre><code>jQuery('.slide_cover').toggle(800);
  </code></pre>
  
  <p>also if i try to get the element in console so it works</p>
  
  <pre><code>jQuery('.slide_cover').get(0)
  </code></pre>
  
  <p>Can you help me?
  Thank you!</p>