JSFiddle - React, Tailwind, and code Playground

HTML

<button>Click</button>
<button>Change</button>

JavaScript

function click() {
	alert(123)
}

const btn1 = document.querySelector('button:nth-child(1)');
const btn2 = document.querySelector('button:nth-child(2)');
let state = true;

btn1.addEventListener('click', click, false);

btn2.onclick = () => {
	state = !state;
	if(state) {
  	btn1.addEventListener('click', click, false);
  } else {
  	btn1.removeEventListener('click', click, false);
  }
}