JSFiddle - React, Tailwind, and code Playground

by Alexey Ukolov

JavaScript

function one(callback) {
    console.log('one.start');

    setTimeout(callback, 1000);

    console.log('one.return');
}

function two(callback) {
    console.log('two.start');

    setTimeout(callback, 1000);

    console.log('two.return');
}

function three() {
    console.log('three');
}

one(function () {
    two(three)
});