JSFiddle - React, Tailwind, and code Playground

HTML

<input name="webURL" type="text" id="webURL" value="" placeholder="Or paste a web URL"><br>
<input type="submit" id="submit-btn" class="webBtn" value="Upload it."/>
    <div id="uploadedPhoto"></div>

CSS

#uploadedPhoto{
    background-image: url("http://www.w3schools.com/cssref/paper.gif");
    height:100px;
}

JavaScript

$('.webBtn').click(function(){
    $('#uploadedPhoto').css('background-image',"url("+$('#webURL').val()+")");
    $('#webURL').val('URL');
});