jquery - Add incremental data attr value based on class name -
i have <li>
s class names follows;
<li class="2014" data-order=""></li> <li class="2014" data-order=""></li> <li class="2013" data-order=""></li> <li class="2013" data-order=""></li> <li class="2013" data-order=""></li> <li class="2012" data-order=""></li>
i need jquery function add values each every <li>
element's data-order. value has set follows.
<li class="2014" data-order="1"></li> <li class="2014" data-order="2"></li> <li class="2013" data-order="1"></li> <li class="2013" data-order="2"></li> <li class="2013" data-order="3"></li> <li class="2012" data-order="1"></li> <li class="2011" data-order="1"></li>
data-order start one. when multiple <li>
having same class, data-order start incrementing 1.
var $ord = $('[data-order]'); $ord.each(function(){ var $ordsib = $('.'+ this.classname ); return $(this).data('order', $ordsib.index(this)+1 ); });
using .index( )
method jquery elements array collection return index position of element. index '0' based need increment 1
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