JSFiddle - React, Tailwind, and code Playground

HTML

<input type="button" id="button" value="Click Me" />
<input type="button" id="button2" value="Click Me 2" />

JavaScript

var onClick = function() {
    alert('Hi');
};

$('#button').click(onClick);

$('#button2').click(function() {
    alert('Hi');
});