const [inputValue, setInputValue] = useState(''); const [list, setList]= useState([]); handleAddIntemOnList(){ // create a new item as object to be added to the list array const newItem = { name: inputValue, addedAt: new Date().toLocaleTimeString("pt-br", { hour: '2-digit', minute: '2-digit' }) } // save into the list state setList(prevState => [...prevState, newItem]) }