JSFiddle - React, Tailwind, and code Playground

HTML

<div class="resist" id="ex1"><h2>Sleep</h2><p></p><button>Resist</button></div>

<div  class="resist" id="ex2"><h2>Eat</h2><p></p><button>Resist</button></div>

JavaScript

var count = 0;
var resist = document.getElementsByClassName('resist') ;
for(var i = 0; i < resist.length; i++)
{    var a = resist[i];
     
    a.querySelector('button').addEventListener('click', function(a){
       count +=1;
        a.getElementsByTagName('p')[0].innerHTML = count;
    });
}