array expansion

In JavaScript, the spread operator ... allows you to expand arrays, objects, and strings. Understanding how to utilize this operator can significantly enhance your coding capabilities. Let’s explore its various applications and examples. Expanding Arrays To create a new array by expanding an existing one, you can use the spread operator. Take the following array a as an example: const a = [1, 2, 3]; Using the spread operator, you can easily create a new array b by appending additional elements:...