Array.prototype.slice()

Overview.

The Array.prototype.slice() method returns a shallow copy of a portion of an array into a new array object selected from start to end (end not included). The original array will not be modified.

Syntax

array.slice()
array.slice(start)
array.slice(start, end)
array.slice(start, end, step)

Parameters

start (optional): Zero-based index at which to start extraction. If omitted, slice begins from index 0.
end (optional): Zero-based index at which to end extraction. Slice extracts up to but not including end. If omitted, slice extracts to the end of the array.
step (optional): The increment between the elements to be sliced. If omitted, the default value is 1. If negative, the slicing will be done from right to left.

return value

A new array containing the extracted elements.

Examples

const array = [1, 2, 3, 4, 5];

// Extract the subarray [2, 3, 4]
const subarray1 = array.slice(1, 4);
console.log(subarray1); // [2, 3, 4]

// Extract the subarray [2, 4]
const subarray2 = array.slice(1, 5, 2);
console.log(subarray2); // [2, 4]

// Extract the subarray [4, 3, 2]
const subarray3 = array.slice(-2, 0, -1);
console.log(subarray3); // [4, 3, 2]