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Handling nested state updates with MobX in a Next.js application

👀 Views: 62 💬 Answers: 1 📅 Created: 2025-05-31
react mobx next.js state-management javascript

I've looked through the documentation and I'm still confused about I've searched everywhere and can't find a clear answer. I'm currently building a Next.js application where I'm using MobX for state management. I've set up a store with nested observables, but I'm working with issues with updating the nested state. The main question arises when I try to update a nested observable in response to an event, and it seems that the component isn't re-rendering correctly. Here's a simplified version of my store: ```javascript import { observable, action } from 'mobx'; class Store { @observable user = { name: '', address: { street: '', city: '' } }; @action updateUserName(newName) { this.user.name = newName; } @action updateUserAddress(newStreet, newCity) { this.user.address.street = newStreet; this.user.address.city = newCity; } } const store = new Store(); export default store; ``` In my component, I'm observing the user object: ```javascript import { observer } from 'mobx-react-lite'; import store from '../stores/store'; const UserProfile = observer(() => { const handleNameChange = (event) => { store.updateUserName(event.target.value); }; const handleAddressChange = () => { store.updateUserAddress('123 Main St', 'Anytown'); }; return ( <div> <input value={store.user.name} onChange={handleNameChange} /> <button onClick={handleAddressChange}>Update Address</button> <div> {store.user.address.street}, {store.user.address.city} </div> </div> ); }); ``` When I click the button to update the address, the street and city values aren’t showing up in the component as expected. I’ve confirmed that the `updateUserAddress` action is being triggered by logging the values after the action is called, but the UI doesn’t reflect the changes. I’m not seeing any behavior messages in the console, which makes it even more puzzling. What could be causing the reactivity to unexpected result in this scenario? I’ve tried cleaning the state and ensuring that the MobX provider is correctly set up, but I’m still running into this scenario. Any insights would be greatly appreciated! How would you solve this? I'm working on a application that needs to handle this. Any help would be greatly appreciated!