Class as contents

by Hari Menon

HTML

<div class="b"></div>
<div class="a"></div>
  <div class="b"></div>
  <div class="b"></div>
  <div class="b"></div>
  <div class="b"></div>
<div class="a"></div>
  <div class="b"></div>
  <div class="b"></div>
<div class="a"></div>
<div class="a"></div>
  <div class="b"></div>
  <div class="b"></div>
  <div class="b"></div>
  <div class="b"></div>
  <div class="b"></div>
  <div class="b"></div>
  <div class="b"></div>

CSS

div:before {
    content: attr(class);
}

div.selected:before {
    color: red;
}

JavaScript

$('.b + .b + .b').addClass('selected');