Slice vs Splice vs Split

Slice

This method copies a given part of an array and returns that copied array. It doesn't change the original array.

array.slice(from, until)

• From: Slice the array starting from an element index

• Until: Slice the array until another element index

  The slice() method doesn't include the last given element

If end is omitted, slice extracts through the end of the sequence (arr.length).

const arr = [1,2,3,4,5];
arr.slice(0, 1); // [1]

// These two are the same because omiting the `end` is the same as extracting 
// through the end of the list (arr.length)
arr.slice(1);    // [2,3,4,5]
arr.slice(1, 5); // [2,3,4,5]

Splice