ES6 Promise

Question

This code deserves a better detailed explanation, step by step. I have never used this kind of thing before and I wonder in what cases it can be useful. say it's more readable .. heuuu lol.
Maybe with the braces in colone, it's a little more readable.
_________________________________________________________________________

function asyncFunc(work)
{
return new Promise(function(resolve, reject)
{
if (work === "")
reject(Error("Nothing"));
setTimeout(function()
{
resolve(work);
}, 1000);
});
}

asyncFunc("Work 1") // Task 1 ***************** >Step 1
.then(function(result) //
{
console.log(result);
return asyncFunc("Work 2"); // Task 2
}, function(error) {
console.log(error);
})
.then(function(result)
{
console.log(result);
}, function(error) {
console.log(error);
});
console.log("End");
_______________________________________________________________________

Question: promise is natif object ? Anyway, I hope I never need it

Answer 1

Here is my video tutorial series about JavaScript Asynchronous Programming

https://www.youtube.com/playlist?list=PLkqwj9vc20pX36wThr2A6DZx4MVcJvnhe

Explaining Promise and then proceed to async await and fetch, and at last web scraping.

These were recorded before I had bought a nice microphone, so please tolerate the low sound volume.

Answer 2

Thanks. ;)