JSFiddle - React, Tailwind, and code Playground

HTML

<div class="red styleblack"></div>
<div class="red styleblue"></div>
<div class="left stylebsomething"></div>
<div class="top styleblack   otherClass  lalalala"></div>
<div class="red stylesomething"></div>
<div class="classHere styles"></div>
<div class="anotherClass style"></div>
<div class="stylered style black notAStyle"></div>

CSS

div{
    width:90px;
    height:90px;
    border:1px dashed green;
    background-color:red;
    float:left;
}
div:hover{
    background-color:blue;
}

JavaScript

$(document).ready(function(){
    $('div').click(function(){
       var c = $(this).attr('class').split(/\s+/);
       for(var s in c)
        if(c[s].indexOf('style') == 0)
            alert(c[s]);
    });
});