javascript - Long UL list in DIV, auto scroll to LI element -

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I have such a strange problem, I have a div 

  _inputHelper // Fixed height (200 pixels)   
 Very long, too long  ; Ul & gt;  In the list (about 200 elements) and I would like to scroll using jQuery in some  & lt; Li & gt; , but the problem is, when I scroll the whole list like this:  
  $ (_inputHelper.find ('ul')) .met ({top: -1 * ($ (_ It). Position () top - $ (_ it). (())}, 200);   
 
  _this is a light element that I would like to scroll down to    
 , But I can not scroll the list using the mouse, here's a printer screen to be more accurate:  
 long ul diva auto scroll problem  
 I think I can scroll incorrectly, but I also tried scroll tap / margin-top and also And it still does not work.  
 Some tests:  
 Any help?   
 
 
 Depending on your Bela, please give it to you  scrollTop , try it:  
  $ ('Input-Assistant'). Animate ({scrollTop: $ ("# test"). Position (). Top,}, 200);   
    
 
 In your code, you are simply moving the  ul  element and then the original Out of view; Now with this you are changing the parents' book.

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