Understand JavaScript Callback Functions and Use Them


via Understand JavaScript Callback Functions and Use Them | JavaScript is Sexy.

(Learn JavaScript Higher-order Functions, aka Callback Functions)

In JavaScript, functions are first-class objects; that is, functions are of the type Object and they can be used in a first-class manner like any other object (String, Array, Number, etc.) since they are in fact objects themselves. They can be “stored in variables, passed as arguments to functions, created within functions, and returned from functions”1.

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