JSFiddle - React, Tailwind, and code Playground

by Oleg Khobotov

HTML

<div class="test goal red">
    <div class="test goal blue">
        <div class="goal green">
            <div class="start">      
                кликни                                              
            </div>                
        </div>             
    </div>   
</div>

CSS

div{
    margin: 50px;
    border: 1px solid;
}

.red{
    border-color: red;
}
.blue{
    border-color: blue;
}
.green{
    border-color: green;
}

JavaScript

$('.start').click(function(){
    $(this).closest('.test').find('.goal').css('borderWidth', '5px');
});