JSFiddle - React, Tailwind, and code Playground

JavaScript

function initButtons() {
    var body = document.body,
        button, i;

    for (i = 0; i < 5; i++) {
        button = document.createElement("button");
        button.innerHTML = "Button " + i;
        button.addEventListener("click", (function (e) {
            alert(i);
        })(), false);
        body.appendChild(button);
    }
}
initButtons();