Hasan Setiawan

Javascript promise with your bare hand

Just show you how does promise work in very simple code

            
function firstMethod() {
	console.log("shoud be called at the first time");
}

function secondMethod() {
	console.log("shoud be called at the second time");
}

function thirdMethod() {
	console.log("shoud be called at the third time");
}
const howPromiseWork = new Promise((resolve, reject) => {
	resolve(firstMethod());
});

howPromiseWork.then(secondMethod())
.then(thirdMethod())
.catch(function(error) {
  console.log(error)
  throw(error);
});

// will print log
VM541:2 shoud be called at the first time
VM541:6 shoud be called at the second time
VM541:10 shoud be called at the third time