021 — 2677. Chunk Array.js

/**
 * @param {Array} arr
 * @param {number} size
 * @return {Array[]}
 */
var chunk = function(arr, size) {
    const chunkedArray = [];
    let index = 0;

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

    return chunkedArray;

};