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Vithu MathiFront End Web Development Techdegree Student 3,474 Points
Hello TreeHouse Community,
I am having a hard time understand what's a asynchronous calls? and what a asynchronous nodeJS APIs is?
Any help would be much appreciated.
Steven Parker229,005 Points
Asynchronous basically means "happening at the same time".
In a typical (synchronous) function call, the main program waits until the function is totally finished before it continues with the main code. But in an asynchronous call, the function just starts something but returns to the main program right away. Then the main code can continue running while the other action is happening at the same time.
An asynchronous call would typically have at least one callback argument, which would be another function it would call to indicate completion or other state change in the task it is performing.