JSFiddle - React, Tailwind, and code Playground

HTML

<ul>
    <li>
        <span>test</span>
        <div></div>
        <div></div>
        <div>
            <input type="button" value="test" id="btnTest"/>
        </div>
</li>
</ul>

JavaScript

$('#btnTest').on("click", function () {
    alert($(this).parents('li').children('span:first').text());
});