Are the two codes the same?

Question

JavaScript

There is a code like this
promise.then(value=>value).then(value=> ...)

promise.then(value=>Promise.resolve(value)).then(value=> ...)

Do I understand correctly that if in the handler for a promise we simply return a value like this (value=> value), then a promise is returned which is automatically in the resolve state? which is what the Promise.resolve() function does - it returns an already resolved promise.

Answer 1

If promiseresolved with a non-promise value value, then promise.then(value => value)and are promise.then(value => Promise.resolve(value))equivalent to promises in the above chain.
The statuses of these promises are the same.
If the promise resolves with the promise value value, then promise.then(value => value)both promise.then(value => Promise.resolve(value))are equivalent: they will return a promise that resolves with the value that resolves to value.
PS To be honest, I don't know how to make a promise resolve to a value that is itself a promise. A cursory lurk and SO suggest that this is not possible, unless we wrap the promise returned during resolution in an object ( link )