import types from '../constants/actionTypes'

export default (state, action) => {
  switch(action.type) {
    case types.ON_CLICK_MENU_BUTTON:
      return Object.assign({}, state, {
        isExpanded: action.isExpanded
      })
  }
}
@@ -39,16 +39,62 @@
 Types'%0A%0A
+const initialState = %7B%0A  isExpanded: false%0A%7D%0A%0A
 export d
@@ -106,16 +106,31 @@
 t (state
+ = initialState
 , action
@@ -196,16 +196,18 @@
 _BUTTON:
+ %7B
 %0A      r
@@ -286,13 +286,64 @@
      %7D)%0A
+    %7D%0A    %0A    default: %7B%0A      return state%0A    %7D%0A
   %7D%0A%7D

Update nav reducer