Intro to promises

- [Instructor] Promises have emerged in the S6 to help…us deal with asynchronous behavior in JavaScript.…When something is asynchronous it means that…some sort of weighting is going on.…There's a delay between when we ask for…something and when we receive it.…To create a promise, I'm going to create…a function called delay.…And what delay is going to do is it's…going to return a new promise.…So here I'm going to use seconds as…our argument, and our function is going…to return a new promise.…Now, this new promise is going to take in…a very important argument, which is resolve.…

So this is what's going to occur whenever…the promise resolves, whenever it is successful.…And in this case, we're going to set a timeout here,…and setTimeout is going to obviously take in…two things: it's going to take in a callback…function, which in this case is resolve; and…it's going to take in the number of milliseconds…before we timeout.…So here we'll say seconds times 1000.…So this is going to return those milliseconds for us.…

Okay, so let's console.log a little message…