utils.js

function explode(array, chunkSize) {
    if (chunkSize === 0) return [];
    const explodedArr = [];
    let innerArr = [];
    for (let i = 0; i < array.length; i++) {
        innerArr.push(array[i]);
        if ( (i + 1) % chunkSize === 0) {
            explodedArr.push(innerArr);
            innerArr = [];
        }
    }
    if (innerArr.length !== 0) {
        explodedArr.push(innerArr);
    }
    return explodedArr;
}