Reflectan

A simple react state management library to manage states simply while only rerendering change components

Usage

First we need to create our initial state

const initialState = {
  user: {
    name: 'John Doe',
    age: 30
  },
  settings: {
    theme: 'light',
    notifications: true
  },
  array: ["hello", "world"]
};

And we create our store like:

// Type is infered here from initialState 
const useStore = createStore(initialState);
// and if needed we can pass in type with
const useStore = createStore<TypeHere>(initialState);

Now to use our store inside an component we do: the type is infered from what we select

// Target what you want to use
const [user, setUser] = useStore(state => state.user); 
// We can also target arrays or array indexes
const [array, setArray] = useStore(state => state.array); 
// ArrayItem is string
const [arrayItem, setArrayItem] = useStore(state => state.array[index]); 

And since we use immer we can only modify the data using the set methods kinda like useState but we use drafts from immer

setUser(draftUser => {
    draftUser.name = "Johny Doe";
    draftUser.age++;

    // optional for objects but for primitive types
    // (string, number, boolean etc) we must return our draft
    return draftUser; // return our new data
});

When data gets changed only the component using the data will be rerendered automatically, including parent listening objects

So if we have an object using useStore(state => state.user) and another component using useStore(state => state.user.name) and we set the name both the userStore for the user and name will be updated