Copy an Object with Object.assign
Problem Explanation
The goal of this challenge is to enforce state immutability when state is an object.
Hints
Hint 1
Use the method Object.assign({}, obj1, obj2)
in return. Pass state
as obj1.
Hint 2
The obj2 should be the updated {key: value}
pair of your state.
Solutions
Solution 1 (Click to Show/Hide)
const defaultState = {
user: "CamperBot",
status: "offline",
friends: "732,982",
community: "freeCodeCamp"
};
const immutableReducer = (state = defaultState, action) => {
switch (action.type) {
case "ONLINE":
// to enforce state immutability, return a new state object using Object.assign() method
return Object.assign({}, state, { status: "online" });
default:
return state;
}
};
const wakeUp = () => {
return {
type: "ONLINE"
};
};
const store = Redux.createStore(immutableReducer);