JSFiddle - React, Tailwind, and code Playground

HTML

<div class="wrapper">
    <div>
        <button>Кнопка 1</button>
    </div>
    <div>
        <button>Кнопка 2</button>
    </div>
    <div>
        <button>Кнопка 3</button>
    </div>
    <div>
        <button>Кнопка 4</button>
    </div>
</div>

JavaScript

$('.wrapper').on('click', 'button', function() {
    alert($(this).parent().index());

})