Document Application Promise Online For Free

I promise to love you as long as you smile at me in your special way. I promise to give you some time on your own so to your own self be true. I promise to give you my help and support always, in all that you do.

Function state(promise: Promise) { let state = "pending"; promise. then(() => state = "fulfilled", () => state = "rejected"); return () => state; } const p = Promise.

Making promises: I promise that I will finish the job on time. I promise you that that's the truth. I swear I will never leave you. I swear I won't let you down. I assure you that I will return the book tomorrow morning. I assure you that I will be there on time. Believe me, I won't make you disappointed.

The .then() method should be called on the promise object to handle a result (resolve) or an error (reject). It accepts two functions as parameters. Usually, the .then() method should be called from the consumer function where you would like to know the outcome of a promise's execution.

A Promise is in one of these states: pending: initial state, neither fulfilled nor rejected. fulfilled: meaning that the operation was completed successfully. rejected: meaning that the operation failed.

Use the then function to access the eventual result of a promise (or, if the operation fails, the reason for that failure). Regardless of the state of the promise, the call to then is non-blocking, that is, it returns immediately; so what it does not do is immediately return the result value of the promise.

Resolve() method in JS returns a Promise object that is resolved with a given value. Any of the three things can happen: If the value is a promise then the promise is returned. If the value has a ?then? attached to the promise, then the returned promise will follow that ?then? to till the final state.