jquery - knockout how to get $parent of $parent -

<div id="root" data-bind="with: $data.building">     <div data-bind="foreach: $data.offices">         <div data-bind="foreach: $data.desks">             <div data-bind="foreach: $data.legs">                 <button class="btndestroydeskleg"> destroy</button>             </div>         </div>     </div> </div> <script>         $("#root").on('click', '.btndestroydeskleg', function ()         {             var context = ko.contextfor(this),                 office = ** ? **,                 desk = context.$parent,                 leg = context.$data;         }); </script> 

how can $parent of $parent? in other word, should replace "** ? **" office?

you can use $parents array described in knockout documentation.

to parent context can use

$parents[0] 

to grandparent context can use

$parents[1] 

so in case can use

office = context.$parents[1]