JSFiddle - React, Tailwind, and code Playground

HTML

<button id="minus1">-</button><p id="text"> 0 </p><button id="plus1">+</button>

CSS

button, p {
  display: inline;
}

JavaScript

var counter = 0;
document.getElementById("plus1").onclick = function(e){
counter++;
  document.getElementById("text").innerHTML = ' ' + counter + ' ';
}
document.getElementById("minus1").onclick = function(e){
if (counter > 0) {
counter--;
document.getElementById("text").innerHTML = ' ' + counter + ' ';
}
  
}