DeepStorage updateIn

updateIn: (...path) => (callback) => Promise;

Updates a value in the state tree e.g.

const storage = deepStorage({
    companies: {
        'd24d59de': {
            id: 'd24d59de'
            name: 'Github'
        }
    }
});

// set company 'd24d59de''s name to 'github'
await storage.deep('companies').deep('d24d59de').deep('name').update(prev => prev.toLowerCase());

updateIn will trigger callbacks to subscribers interested in the part of the state tree that's being updated. The updateIn callback should not mutate the previous value.

If a path does not exist, deep storage will create the intermediate nodes as objects e.g.

const storage = deepStorage({
});

// set company 'd24d59de''s name to 'Google'
await storage.deep('companies').deep('d24d59de').update(prevState => { name: 'Google' });

console.log(storage.state);

// { companies: { d24d59de: { name: 'Google' } }

This is similar to how immutablejs's updateIn behaves