JSFiddle - React, Tailwind, and code Playground

HTML

<audio id="a" controls><source  src="https://upload.wikimedia.org/wikipedia/commons/e/ec/Beat_L438_R442.ogg" type="audio/ogg" />
</audio>
<button type="button" id="btn1">play/pause</button>

JavaScript

var sng1 = document.getElementById("a"); 
var bt1 = document.getElementById("btn1");
btn1.onclick = function(event){
    if(sng1.paused) {    
       sng1.play();
    } else {
       sng1.pause();
    }
}