JSFiddle - React, Tailwind, and code Playground

HTML

<div class="row">row1</div>
<div class="row">row2</div>
<div class="row">row3</div>
<div>
    <div class="row">row4.1</div>
    <div>
        <div class="row">row4.2.1</div>
        <div class="row">row4.2.2</div>
        <div class="row">row4.2.3</div>
    </div>
    <div class="row">row4.3</div>
    <div class="row">row4.4</div>
</div>
<div class="row">row5</div>

CSS

.highlighted {
   background-color:green;    
}

JavaScript

$('.row:even').addClass('highlighted');