Create a Resolved Promise in JavaScript with Promise.resolve()

The Promise.resolve() method returns a Promise object that is resolved with the given value. It can be used to convert “promise-like” objects to native Promise objects: If you pass a thenable (an object with a then() method) to Promise.resolve(), the returned Promise object will eventually adopt the same state.

Note that Promise.resolve() doesn't necessarily return a fulfilled promise. If it receives a thenable that ends up being rejected, the returned Promise object will be rejected as well. Check out States and Fates for a more detailed explanation.