Async-Await.js

// From callback to async/await


// 1. Callback

const makeHttpRequest = (url, methodType, callback) => {
	const xhr = XMLHttpRequest();
	xhr.open(methodType, url, true);
	xhr.onreadystatechange = () =>{
		if(xhr.readyState === 4 && xhr.status === 200){
			callback(xhr.responseText);
		}
	}

	xhr.send();
}

const getLogin(response) =>{
	console.log(JSON.parse(response));
}

const url = 'https://api.github.com/users/nishant8BITS';

makeHttpRequest(url, 'GET', getLogin);


// 2. Generators

function* getUser(username){
	const uri = `https://api.github.com/users/${username}`;
	const response = yield fetch(uri);
	const parsedResponse = yield response.json();
	console.log(parsedResponse);
}

getUser('nishant8BITS');


// 3. Using async/await

const getUser = async (username) =>{
	const uri = 'https://api.github.com/users/' + username
	const response = await fetch(uri);
	const parsedResponse = await response.json();
	console.log(parsedResponse);
}