JSFiddle - React, Tailwind, and code Playground

by Ajey

HTML

<div class="parent">
    <div class="row">
        
        
    </div>
    
</div>

CSS

body {
    margin: 0;
    padding: 0;
}

.parent {
    font-size: 0;
}
.node {
    background: #CCC;
    height: 50px;
    width: 50px;
        margin: 2px 2px;
    display: inline-block;
}

JavaScript

$(document).ready(function(){
    var nodeDiv = '<span class="node"></span>';
   var row = $('.row');
    var node = $('.node');
   var parent = $('.parent'); 
   
   
    for(var i = 0; i< 50; i++) {
        
       parent.append(nodeDiv);      
    }
    var windowWidth = $(document).width();
    var lastRow = Math.floor(windowWidth/54);    
    console.log("doc - ",lastRow);
    
    lastRow = 50 % lastRow;
    
    console.log(50 % lastRow);
    var count = parent.children().length;
    
    var lastChild  = parent.children().last();
    lastChild.css({'background':'red'}); 
    
    for(var i=1; i < lastRow; i++) {
        lastChild = lastChild.prev();
        lastChild.css({'background':'red'});    
    }
    
    
    
        
});