JSFiddle - React, Tailwind, and code Playground

HTML

<button id='b1'>my button</button>

JavaScript

var boolval = true;
$('#b1').mouseover(function () {
    if (boolval) {
        alert('worked!');
        //_gaq.push(['category', 'action','lable','opt_interaction','value'])
        boolval = false;
    }
});