Unexpected Behavior with Object Spread Operator in State Updates Inside React Functional Component
I'm having a hard time understanding I've looked through the documentation and I'm still confused about I'm experiencing unexpected behavior when using the object spread operator to update state in a React functional component. I'm currently using React 18 and have a piece of state that holds an object representing user settings. When I try to update a nested property using the spread operator, it seems like the state isn't updating as expected and the component doesn't re-render. Here’s a simplified version of my code: ```javascript import React, { useState } from 'react'; const UserSettings = () => { const [settings, setSettings] = useState({ theme: 'light', notifications: { email: true, sms: false } }); const toggleEmailNotification = () => { setSettings(prevSettings => ({ ...prevSettings, notifications: { ...prevSettings.notifications, email: !prevSettings.notifications.email } })); }; console.log(settings); return ( <div> <h1>User Settings</h1> <p>Current Theme: {settings.theme}</p> <p>Email Notifications: {settings.notifications.email ? 'Enabled' : 'Disabled'}</p> <button onClick={toggleEmailNotification}>Toggle Email Notifications</button> </div> ); }; export default UserSettings; ``` When I click the button to toggle the email notifications, the state updates correctly in the console, but the UI does not reflect the changes. I’ve tried using `React.memo` on the component, but that doesn't seem to fix the issue. I've also verified that `prevSettings.notifications` is correctly updated by logging it inside the function. However, the component does not re-render as expected when the state changes. Could there be something I'm missing with how the state updates work in React 18, or is there something specific about the object spread operator that I need to be aware of? Any insights would be greatly appreciated! I'm on Debian using the latest version of Javascript. The stack includes Javascript and several other technologies.