Lesson 25 - JavaScript Learning App

Lesson Overview

This lesson covers advanced JavaScript concepts including closures, promises, and async/await.

Graphical Preview

Graphical representation of advanced concepts will be displayed here.

Code Preview


// Example of a closure
function makeCounter() {
    let count = 0;
    return function() {
        count++;
        return count;
    };
}

const counter = makeCounter();
console.log(counter()); // 1
console.log(counter()); // 2

// Example of a promise
const myPromise = new Promise((resolve, reject) => {
    setTimeout(() => {
        resolve("Promise resolved!");
    }, 1000);
});

myPromise.then(response => console.log(response));

// Example of async/await
async function fetchData() {
    const response = await myPromise;
    console.log(response);
}
fetchData();