How do I add an element to array in reducer of React native redux?

Question

How do I add elements in my array arr[] of redux state in reducer? I am doing this-

import {ADD_ITEM} from \'../Actions/UserActions\'
const ini         


        

Answer 1

Two different options to add item to an array without mutation

case ADD_ITEM :
    return { 
        ...state,
        arr: [...state.arr, action.newItem]
    }

OR

case ADD_ITEM :
    return { 
        ...state,
        arr: state.arr.concat(action.newItem)
    }