//Async/Await was introduced in ES 8(2017) to simplify working with asynchronous code.

//It allows you to write asynchronous operations in a style that looks synchronous.

//Async/Await is built on top of Promises.

//WE HAVE BASIC RULES

// 1️. A function declared with 'async' always returns a Promise.

// 2️.The 'await' keyword can only be used inside an async function.

// 3️.'await' pauses the function execution until the Promise settles (resolved or rejected).

//Examples

async function greet() {

return "Hello, world!";

}

// The function above automatically returns a Promise.

// Let's use it now

greet().then((message) => console.log(message)); // Output: Hello, world!

// Exapmple Using await to pause execution until the Promise resolves

async function getData() {

console.log("Fetching data...");

// Simulating an API request with setTimeout

let data = await new Promise((resolve) => {

setTimeout(() => {

resolve(" Data fetched successfully!");

}, 2000);

});

console.log(data);

console.log("Process complete!");

}

getData();

// Output order:

// Fetching data...

// (waits 2 seconds)

// Data fetched successfully!

// Process complete!

// ERROR HANDLING WITH try...catch

async function fetchUser() {

try {

let response = await fetch("https://api.github.com/users/codeby-david");

// 'await' pauses until fetch completes

let data = await response.json();

console.log(" User:", data.login);

} catch (error) {

// This block runs if an error occurs (like network failure)

console.error("Error fetching user:", error);

}

}

fetchUser();

// REAL-WORLD EXAMPLE (Fake API Simulation)

function getUserFromServer() {

return new Promise((resolve, reject) => {

let success = true;

setTimeout(() => {

if (success) {

resolve({ name: "David", age: 81 });

} else {

reject("Failed to get user!");

}

}, 1500);

});

}

async function displayUser() {

try {

console.log("Loading user...");

const user = await getUserFromServer(); // waits for data

console.log("User loaded:", user);

} catch (err) {

console.error("Error", err);

}

}

displayUser();