Use the Spread Operator on Arrays

JavaScript
1

Tell us what’s happening:

Your code so far


const immutableReducer = (state = ['Do not mutate state!'], action) => {
  switch(action.type) {
    case 'ADD_TO_DO':
      // don't mutate state here or the tests will fail
      return
    default:
      return state;
  }
};

const addToDo = (todo) => {
  return {
    type: 'ADD_TO_DO',
    todo
  }
}

const store = Redux.createStore(immutableReducer);

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Link to the challenge:

2

What have you tried so far? The code you’ve provided seems to be exactly what you’re starting with in the course.

3

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