JSFiddle - React, Tailwind, and code Playground

HTML

<div id="game">
    <button class="user" data-name="rock">Rock</button>
    <button class="user" data-name="paper">Paper</button>
    <button class="user" data-name="scissors">Scissors</button>
    <div id="result"></div>
    <br>
    <br>
    <button id="test">DEBUG</button>
</div>

JavaScript

$(document).ready(function() {
    var user = "none";
    $(".user").click(function() {
        user = $(this).attr("data-name");
    });
    
    $("#test").click(function() {
        alert(user);
    });
});