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Frequently Asked Questions

What are the benefits of using callbacks?

This is one of the two main advantages of callbacks. The other advantage is that the calling function can pass whatever parameters it wishes to the called functions (not shown in the above example).

What are the different types of callbacks?

There are two types of callbacks, differing in how they control data flow at runtime: blocking callbacks (also known as synchronous callbacks or just callbacks) and deferred callbacks (also known as asynchronous callbacks ).

How do callbacks help improve API workflow?

This helps you improve the workflow your API offers to clients. A typical example of a callback is subscription functionality – users subscribe to certain events of your service and receive a notification when this or that event occurs. For example, an e-shop can send a notification to the manager on each purchase.

How do callbacks work?

A callback is a function passed as an argument to another function. This technique allows a function to invoke the parameter function argument and even to pass a value back to the caller. A callback function can be designed to run before/after the function has finished and can pass a value.

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