javascript - Get index of elements nested in different divs -

is possible index of checked input, of them nested in different divs. eg such situation:

<div class="parent">   <div>     <input></input>     <input></input>     <input></input>   </div>   <div>     <input checked="checked"></input>     <input></input>     <input></input>   </div> </div> 

so checked input show

index = 3

how build such selector? possible? or can show index of children nested directly withing same parent?

try invoke .index() on entire collection passing target element,

var inputs = $(".parent input:checkbox"); var index = inputs.index(inputs.filter(":checked")); //3 

demo

a demonstration valid html given here.