Make parseState or getState configurable

[tpict]

Would it be possible to override one of these functions in the config option so we can store objects which aren't trivially deserialized from JSON? e.g. Set

[polemius]

You could pass Storage implementation to recoilPersist as storage, and change behavior of getItem and setItem. For example this storage encode everything in base64 and save it in localstorage. On read get the value from localstorage, decode and return it:

import { encode, decode } from 'js-base64';

const localStorageBase64 = () => {
  return {
    setItem: (key, value) => {
      localStorage.setItem(key, encode(value))
    },
    getItem: (key) => {
      const a =  localStorage.getItem(key)
      return decode(a || '')
    },
    clear: () => {
      localStorage.clear()
    },
  }
}

const { persistAtom } = recoilPersist({ key: 'abc1234', storage: localStorageBase64() })