project-starter-dan/templates/fullstack-db/client/redux/reducer.js

A project scaffolding tool.

const initialState = {
  data: []
};

export const ADD_DATA = 'ADD_DATA';
export const addData = (data) => {
  return {
    data,
    type: ADD_DATA
  };
};

/* reducer */
const reducer = (state = initialState, action) => {
  let newData = state.data;
  switch (action.type) {
    case ADD_DATA:
      newData.push(action.data);
      return {
        ...state,
        data: newData
      };
    default:
      return state;
  }
};

export default reducer;