Promise.resolve()
The
Promise.resolve()
static method "resolves" a given value to a
Promise
. If the value is a promise, that promise is returned; if the value is a
thenable
,
Promise.resolve()
will call the
then()
method with two callbacks it prepared; otherwise the returned promise will be fulfilled with the value.
This function flattens nested layers of promise-like objects (e.g. a promise that fulfills to a promise that fulfills to something) into a single layer — a promise that fulfills to a non-thenable value.