DRAFT
SetTimeoutReturnsCallbackResult
Misconception:
Calling setTimeout(foo, ms) calls foo after ms milliseconds and returns the value returned by foo.
Incorrect
SetTimeout returns the value returned by the callback function
Correct
SetTimeout returns an identifier of the newly scheduled timer
CorrectionHere is what's right.
Here is what's right.
With setTimeout we schedule the asynchronous execution of a given function. This means that the function is not being executed right now, but will be later in the future. For this reason, it is impossible that the value returned by setTimeout is the result of the function passed as a first argument.
The setTimeout API actually returns something, but it has nothing to do with the result of the function. It is an identifier through which one can possibly cancel the planned execution of the function.