reducer pattern with blocks

switcheroo-blocked-case-reducer.js

import { DO_THING, DO_OTHER_THING, SOMETHING_ELSE } from './actions'

export default (state, { type, payload }) => {
  switch (type) {
    case DO_THING: {
      // by using blocks in our case statements we can create locally scoped vars
      // and returning early keeps things readable
      const scopedVariable = payload.thing
      return Object.assign({}, state, {do: scopedVariable}) 
    }
    case DO_OTHER_THING: {
      return Object.assign({}, state, {doOther: 'thing'}) 
    }
    case SOMETHING_ELSE: {
      return Object.assign({}, state, {something: 'else'}) 
    }
  }
  
  return state
}