JSFiddle - React, Tailwind, and code Playground

JavaScript

var cb = function (t) {
    console.log('callback -->' + t);
};

for (var i = 0; i < 3; i++) {
    (function (i) {
        console.log(i);
        setTimeout(function () {
            cb(i);
        }, 1000);
    }(i));
}