JSFiddle - React, Tailwind, and code Playground

HTML

<button id="start">start</button>
<button id="stop">stop</button>

JavaScript

var funky = setInterval(function() {
    	alert('hello world');
    }, 2000);
    
    $('#start').click(function() {
        funky();
    });
    $('#stop').click(function() {
        clearInterval(funky);
    });