JSFiddle - React, Tailwind, and code Playground
by Vladimir
HTML
<button>нажми</button>
<button>на</button>
<button>кнопку</button>
<button>получишь</button>
<button>результат</button>
JavaScript
function openPopup(index) {
console.log(index);
}
document.querySelectorAll('button').forEach(function(button, index) {
button.onclick = e => openPopup(index);
});