JSFiddle - React, Tailwind, and code Playground
by calder12
HTML
<div style="width:200px;">
<select class="selectClass red">
<option value="red">Red</option>
<option value="blue">Blue</option>
<option value="green">Green</option>
</select>
<br />
<select class="selectClass red">
<option value="red">Red</option>
<option value="blue">Blue</option>
<option value="green">Green</option>
</select>
</div>
CSS
.red{color:red;}
.blue{color:blue;}
.green{color:green;}
.selectClass{width:300px;}
JavaScript
$("select").on("change",function(){
varCurrent = $(this).attr("class").split(" ");
varNew = $(this).val();
$(this).removeClass(varCurrent[1]).addClass(varNew);
});