How to move an element into another element?

Question

I would like to move one DIV element inside another. For example, I want to move this (including all children):

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Answer 1

Ever tried plain JavaScript... destination.appendChild(source); ?

onclick = function(){ destination.appendChild(source); }

div{ margin: .1em; } 
#destination{ border: solid 1px red; }
#source {border: solid 1px gray; }

 

  

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