JAVASCRIPT

Push object to of the array Hooks

const [array,setArray] = useState([]);
Push value at the end:

setArray(oldArray => [...oldArray,newValue] );
Push value at the start:

setArray(oldArray => [newValue,...oldArray] );

adding to array using reach hooks

setMyArray(oldArray => [...oldArray, newElement]);

add items to a react array in hooks

const addMessage = (newMessage) => setMessages(state => [...state, newMessage])