To better understand this concept, let’s look at another example:: const arr = If you are wondering why we have subtracted 1 from the end index, it is because the end index is always exclusive, which means the end index is not included. This means we will start slicing the array from arr, which is 4, and we still stop at arr, which is 6. In this case, the output of the code will be. Here we have an array of integers named arr, and we are using the slice method on it and storing the output of the slice method in a new variable named newArr. const arr = Ĭonsole.log(newArr) Code language: JavaScript ( javascript ) Let’s look at some code examples to understand this better. slice() method can be used on both arrays and strings (which is just an array of characters). This can be helpful when you need to manipulate data in a different way than the original.

slice() method to create a new array or string based on an existing one. This function can be very helpful when you need to process only a subset of data. The method can be used to quickly and easily extract a portion of an array or string.slice() method can be helpful when working on a big project: This method creates a shallow copy and does not modify the original array or string. The start_index in the method is inclusive (where start_index is included), and the end_index is exclusive (where end_index is not included).

It then returns an array containing elements from the start index to the end index. It’s implementation looks something like this: target.slice(start_index, end_index) Code language: JavaScript ( javascript ) If not, check out the JavaScript functions guide to learn more. ℹ️ Before getting started, we assume that you understand how functions work in JavaScript. To help you understand this helpful method, we will discuss exactly what it is and four ways you can use it. slice() method is a common method that’s often used in code but not often understood by novice developers.

Slice array javascript