JSFiddle - React, Tailwind, and code Playground
HTML
Paste image url to textbox
<ul>
<li>http://cdn1.iconfinder.com/data/icons/CrystalClear/48x48/actions/agt_login.png</li>
<li>http://www.discoposse.com/wp-content/uploads/2014/08/test-all-the-things.jpg</li>
</ul>
<br/><input id="inputName"></input>
<br/><img id="inputValue" src="" />JavaScript
$('#inputName').bind('input',function(){
$('#inputValue').attr("src", $(this).val());
});