How does stackoverflow make its Tag input field? [closed]

What about Bootstrap solution?

You can try this :

HTML Code:

<input type="text" value="html,input,tag" data-role="tagsinput"></input>

For CSS, call these two files:

<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/css/bootstrap.min.css">
<link rel="stylesheet" href="http://bootstrap-tagsinput.github.io/bootstrap-tagsinput/dist/bootstrap-tagsinput.css">

For Javascript, call these two files:

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.4/jquery.min.js"></script>
<script src="http://bootstrap-tagsinput.github.io/bootstrap-tagsinput/dist/bootstrap-tagsinput.min.js"></script>

The code will generate the result below:

enter image description here

Check it out.

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