Jquery Draggable + Bring to Front

Question

I have a window with a number of chat DIV\'s where a user to chat to different people.

Currently the chat DIV\'s can be open and moved around but I can\'t see to get the

Answer 1

Though there is an option - 'stack' existing while initiating draggables like this -

$('.draggable').draggable({
    stack: ".draggable"
});

But it is not working properly, So I have wrote a small library dragToFront playing with z-index. Following is the plunkr link

https://embed.plnkr.co/mJqkxSJhf1Umg7r2oLQN/