split an array into smaller arrays in Javascript

const splitArray = (arr, size) => {
  const splittedArrays = [];
  let index = 0;

  while (index < arr.length) {
    splittedArrays.push(arr.slice(index, index + size));
    index += size;
  }

  return splittedArrays;
}

This code takes an array, arr, and a number, size. It then creates an empty array, splittedArrays, and a variable index that is initially set to 0. Next, there is a while loop that will continue to run until the index is greater than the arr.length. The loop pushes a new array with elements from the arr starting at the index position and ending at index plus size. Afterwards, the index is incremented by size. The loop will repeat until the index is greater than the arr.length. At this point, the splittedArrays will have been populated and the code will return it.