SO-34923221

by David Thomas

HTML

<div id="mydiv" class="a"></div>
<div id="myotherdiv"></div>

CSS

div {
  height: 2em;
  border: 3px solid limegreen;
  margin-top: 0.5em;
  border-radius: 1em 0;
}

.found {
  border-color: orange;
}

JavaScript

var div1 = $("#mydiv"),
  div2 = $('#myotherdiv'),
  div1HasClassName = div1.prop('className').trim().length > 0,
  div2HasClassName = div2.prop('className').trim().length > 0;

if (div1HasClassName) {
  div1.addClass('found');
}

if (div2HasClassName.length > 0) {
  div2.addClass('found');
}