You have two objects:
const shoppingList = { milk: 1, bread: 2, sugar: 1};
const addingList = { apple: 4, lemon: 2 };Copy all properties from addingList to shoppingList using Object.assign(), in order to get this:
const shoppingList = { milk: 1, bread: 2, sugar: 1, apple: 4, lemon: 2 }Tip: Do not console log the output. It's taken care of internally