Optional chaining | JavaScript best practices |
Optional chaining is a new feature introduced in ES2020 that simplifies JavaScript code by allowing you to safely access nested properties and methods without worrying about null or undefined values. In this video, we'll explore how optional chaining works and how to use it to simplify your code.
We'll start by looking at an example of code that checks for the existence of nested properties without optional chaining. This code is verbose and difficult to read, especially when dealing with multiple nested properties. Then, we'll introduce optional chaining and show how it can be used to simplify this code by reducing the number of checks and removing unnecessary conditional logic.
We'll also cover some best practices for using optional chaining, including when to use it and when to stick with traditional checks for null and undefined values. Finally, we'll look at some common use cases for optional chaining, such as working with APIs that return nested JSON data.
By the end of this video, you'll have a solid understanding of optional chaining in JavaScript and how it can be used to simplify your code and improve readability
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