react array insert code example

Example 1: React Hooks append state

setTheArray(currentArray => [...currentArray, newElement])

Example 2: add new array at the back of react state

this.setState(prevState => ({
  myArray: [...prevState.myArray, "new value"]
}))

Example 3: add items to a react array in hooks

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