JSFiddle - React, Tailwind, and code Playground

HTML

<div class="divs">
        Thumb1
    </div>    
    <div class="divs">
        Thumb1
    </div>    
    <div class="divs">
        Thumb1
    </div>    
    <div class="divs">
        Thumb1
    </div>

CSS

.color {
    background-color: yellow;
}

JavaScript

var addclass = 'color';
var $cols = $('.divs').click(function(e) {
    $cols.removeClass(addclass);
    $(this).addClass(addclass);
});
var $cols2 = $('.divs');
 
console.log($('.divs').click(function(e) {
    $cols.removeClass(addclass);
    $(this).addClass(addclass);
}));