I'm wondering about the definition of a callback function, particularly in the context of MDN documentation such as array.filter. How can I differentiate between a synchronous and asynchronous callback function?
I'm wondering about the definition of a callback function, particularly in the context of MDN documentation such as array.filter. How can I differentiate between a synchronous and asynchronous callback function?
To understand the concept, you must consider the approach: if the API itself carries out asynchronous tasks, then the process is asynchronous. Good examples of asynchronous APIs include AJAX, Web Sockets, WebRTC, and Web Workers.
On the other hand, all other Web browser APIs such as functions within Array.prototype operate synchronously.
Therefore, it's important to note that the term callback does not determine whether the function is asynchronous or synchronous, but rather that a function must be passed as an argument with input parameters or as a function without parameters.
It would be beneficial to label asynchronous functions with the suffix Async. For instance, functions like setTimeoutAsync(...) or sendAsync. However, this is simply a subjective coding convention that is not commonly used in JavaScript (unfortunately).
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