JSFiddle - React, Tailwind, and code Playground

by manoj

HTML

<ul>
<li id="1">List Item 1</li>
<li id="2">List Item 2</li>
<li id="3">List Item 3</li>
</ul>

CSS

.active{ color:red; }

JavaScript

var arr = [1,2];

$($.map(arr,function(val,_){
  return "#" + val;
}).join()).addClass('active');