AppReducer.js - Example with React, Redux and Axios API

AppReducer.js

const initialState = {
    name: '',
    response: ''
};

export default function AppReducer(state = initialState, action) {
    const newState = Object.assign({}, state);
    switch (action.type) {
        case 'UPDATE_NAME':
            newState.name = action.name;
            return newState;
        case 'LOAD_RESPONSE':
            newState.response = action.response;
            return newState;
        default:
            return state;
    }
}