The value can be a string, number, boolean, null, object, or even another function. What Is a Callback Function?Ī function can accept one or more values (as parameters). We’ll learn how to define callback functions in JavaScript by going through some examples. If you’re looking to learn the ins and outs of JavaScript callback functions, including ES6 arrow functions, then this article is for you. If you want to be adept at writing JavaScript, you’ll need to master callbacks. They’re commonly used when performing network requests, reacting to page-related events, and using code from a third-party library. A function is a chunk of code that you can use over and over again to perform a given task in your program, rather than writing the code multiple times.Ĭallback functions are an integral part of JavaScript.
If you’re familiar with programming, you’ve certainly used functions.
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