How to return a DefaultValue in read of useRecoilSync?

[ci7lus]

Hi, I am referencing an external source in useRecoilSync's read, but when it returns undefined or DefaultValue it does not fall back to the default value.

Code

export const testAtom = atom<boolean>({
  key: `test`,
  default: true,
  effects: [
    syncEffect({ storeKey:"store-key", refine: $.boolean() }),
  ],
})

Try1

  useRecoilSync({
    storeKey: "store-key",
    read: (key) => {
      return store.get(key) || undefined
    },

Try2

  useRecoilSync({
    storeKey: "store-key",
    read: (key) => {
      return store.get(key) || DefaultValue
    },

Occur

[<root>]: value is not a boolean

Environment

• recoil 0.7.3-alpha.2
• recoil-sync 0.0.1-alpha.2

[drarmstr]

DefaultValue is the class, so try creating a new instance of that class with new DefaultValue().

[ci7lus]

@drarmstr Thanks!