READ THE COMMENTS FOR BETTER UNDERSTANING
REVEAL THIS FIRST
/*
//The fancy callbacks
function pranav(cb){
setTimeout(function() {
cb("Logged this just by using callbacks");
},1000)
}
function logIt(data) {
console.log(data)
}
pranav(logIt)
*/
SECOND REVEAL
/*
// Promises
// just the sintactical sugar for the callback
// no need of callbacks
// but works by callbacks under the hood
function pranav() {
return new Promise(function(resolve) {
setTimeout(function() {
resolve("this returns by the promise");
},1000)
})
}
function logIt(data) {
console.log(data)
}
pranav().then(logIt);
*/
THIRD REVEAL
/*
//the use case of async and await just for sake of writing clean code, intead of the above thing
//for the sake of writing better code using async and await rather than .then(function() {});
function pranav() {
return new Promise(function(resolve) {
setTimeout(function() {
resolve("this returns by the promise and by using async & await");
},1000)
})
}
async function main() {
let value = await pranav();
console.log(value);
}
main();
// the above code is the same as the below code but again clean and good to use , more meaningful.
// function main() {
// pranav().then(function logIt(data) {
// console.log(data)
// });
// }
*/
