javascript - Having Issue On Bootstrap 3 SlideDown() hidden Element -

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can please take @ this demo , let me know why change() function not able slidedown() hidden element in bootstrap 3?

here code have

$(function() {     $('input:radio').change(function() {         if($(this).val()== 'dog') {             $('#hidden-list-1').slidedown();         }         if($(this).val()== 'bird'){             $('#hidden-list-2').slidedown();           }     }); });

as other answers have mentioned issue boostrap has style 

.hidden{   display: none !important; }

one way solve removing hidden class.

$('#hidden-list-1').hide().removeclass('hidden').slidedown();

here demo https://jsfiddle.net/dhirajbodicherla/zzdl5jp7/3/


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