How to update nested redux state -


i have following structure

lookups --> object lookups.categories --> array of category objects lookups.timezones --> array of timezone objects

i add new object, lookup object has lookup_type property. either 'category' or 'timezone'. depending on lookup_type, newly added object has added either categories or timezones object. how achieved? structure of lookups object

lookups: {categories:[{obj1}, {obj2}...], timezones:[{obj1}, {obj2}, {obj3}...]}

you can use spread on nested object or array too:

return {   ...state,   [action.lookuptype]: [     ...state[action.lookuptype],     action.value,   ] };

that add new item categories or timezone, if want replace value or insert @ index etc should construct new array how want above return , pass instead. note array spread es7.


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