Learning Redux

Filter reducer

This reducer function is quite simple; it simply sets and clears the filter value, which is set to false (show all posts) by default.

Create a new src/reducers/filter.js file with the following contents:

import { SET_FILTER, CLEAR_FILTER } from '../actionTypes'

export default function filterReducer (state = false, action) {
  switch (action.type) {
    case SET_FILTER:
      return action.filter
    
    case CLEAR_FILTER:
      return false
    
    default:
      return state
  }
}