JSFiddle - React, Tailwind, and code Playground

HTML

<div class="ses_0 box"></div><div class="res_0 box"></div>
<div class="ses_1 box"></div><div class="res_1 box"></div>
<div class="ses_2 box"></div><div class="res_2 box"></div>
<div class="ses_3 box"></div><div class="res_3 box"></div>
<div class="ses_4 box"></div><div class="res_4 box"></div>
<div class="ses_5 box"></div><div class="res_5 box"></div>
<div class="ses_6 box"></div><div class="res_6 box"></div>
<div class="ses_7 box"></div><div class="res_7 box"></div>

CSS

.box{width:20px;height:20px;background:red;float:left;margin:2px;}

JavaScript

//$('[class^="ses_"]').each(function(index){
//    $(this).prepend(index);
//});

$('[class^="ses_"]').each(function(){
    $(this).hide();
});
$('[class^="res_"]').each(function(){
    $(this).hide();
});