Function addItems

test/modify-items.js:1–17

(numItems= 10)

function addItems(numItems= 10) {
  const container = document.querySelector(".container");
  const items = container.children;
  const lastItem = items[items.length - 1];
  const lastNumber = parseInt(lastItem.innerHTML);

  for (let i = 1; i <= numItems; i++){
    const newDiv = document.createElement("div");
    const newNumber = lastNumber + i;

    newDiv.innerText = newNumber.toString();
    container.appendChild(newDiv);
    newDiv.classList.add(`item${newNumber}`);
  }

  magicGrid.positionItems();
}

function removeItems(numItems = 10) {
  const container = document.querySelector(".container");