Value from localStorate is null not return default value

[hiimnhan]

When I get item with key from recoil-persist, value seems to be null instead of default value.

Codesandbox: https://codesandbox.io/s/eloquent-hypatia-k2eb4?file=/src/App.js

[polemius]

I am not sure about effect localStorageEffect but If I add a recoil-persist effect to atom then I can see the non null value in console:

const { persistAtom } = recoilPersist({ key: "auth" });

const counterState = atom({
  key: "count",
  default: 1,
  effects_UNSTABLE: [persistAtom]
});

export default function App() {
  const [count, setCount] = useRecoilState(counterState);
  console.log(count);
  console.log("persist", window.localStorage.getItem("auth"));

https://codesandbox.io/s/lucid-forest-teu5h?file=/src/App.js

[hiimnhan]

Your solution works pretty good with primitive type. But when i change default to an object {id: 1, name: ''} an error appears
Objects are not valid as a React child (found: object with keys {id}). If you meant to render a collection of children, use an array instead.

Codesandbox: https://codesandbox.io/s/lucid-forest-teu5h?file=/src/App.js

[polemius]

@hiimnhan this error is from React, because React could not render the object, we have to get values by keys in JSX:

Codesandbox: https://codesandbox.io/s/lucid-forest-teu5h?file=/src/App.js

const { persistAtom } = recoilPersist({ key: "auth" });

const counterState = atom({
  key: "count",
  default: { id: 1, name: "" },
  effects_UNSTABLE: [persistAtom]
});

export default function App() {
  const [person, setPerson] = useRecoilState(counterState);
  console.log(person);
  console.log("persist", window.localStorage.getItem("auth"));

  return (
    <div>
      <h3>Id: {person.id}</h3>
      <h3>Name: {person.name || "[Empty Name]"}</h3>
      <button onClick={() => setPerson({ ...person, id: 12 })}>
        Set id to 12
      </button>
      <button onClick={() => setPerson({ ...person, name: "John" })}>
        Set name to 'John'
      </button>
    </div>
  );
}

[polemius]

Looks like this issue was not recoil-persist related. I am closing this issue