💡React Interview Question💡
How to decide whether to have a single state, containing an object to store the entire component state or declare a separate state for each data in the functional component?
𝗔𝗻𝘀𝘄𝗲𝗿:
Whenever you have related pieces of information that you want to manage together, then store them in an object in a state.
For example, if you have form inputs where each input value is a separate field in an object, it can be convenient to manage them all together in a single state object.
This can help keep your code organized and make it easier to update multiple values at once as shown below:
const [state, setState] = useState({
firstName: '',
lastName: '',
email: '',
});
const handleChange = (event) => {
const { name, value } = event.target;
setState((prevState) => ({
...prevState,
[name]: value,
}));
};
However, use separate state variables when each piece of state is independent and doesn't need to be managed together.
For example, if you have a component that needs to track both a count and a boolean value which are not related to each other, it would make sense to use separate state variables for each of them as shown below:
const [count, setCount] = useState(0);
const [isModalOpen, setIsModalOpen] = useState(false);
𝗣𝗦: 𝗪𝗮𝗻𝘁 𝘁𝗼 𝗹𝗲𝗮𝗿𝗻 𝗥𝗲𝗮𝗰𝘁 𝗳𝗿𝗼𝗺 𝘀𝗰𝗿𝗮𝘁𝗰𝗵? 𝗰𝗵𝗲𝗰𝗸 𝗼𝘂𝘁 𝗺𝘆 𝗥𝗲𝗮𝗰𝘁 𝗖𝗼𝘂𝗿𝘀𝗲 𝗹𝗶𝗻𝗸 𝗶𝗻 𝘁𝗵𝗲 𝗰𝗼𝗺𝗺𝗲𝗻𝘁.
#javascript #reactjs #webdevelopment
React Trainer | MERN Trainer | Full Stack Developer | Freelancer | Blogger | Freelance Writer
10moBeginners Guide to React Playlist:��https://bit.ly/484M6UA Mastering ES6 Youtube Playlist: https://bit.ly/44Rqadr Join 3 hours React.js Masterclass: https://courses.yogeshchavan.dev/learn-react-3-hours-live-masterclass Most requested youtube video: https://bit.ly/3JKeC3e Subscribe to My Youtube Channel: https://bit.ly/3JKZbXL React Router 6 Crash Course: https://bit.ly/3mAgjYN Learn Express JS + MongoDB From Scratch: http://bit.ly/3o1mJQP 130+ Tips, Tricks & Resources ebook: https://bit.ly/3EjLDyl All my courses: https://courses.yogeshchavan.dev/ Subscribe to my weekly newsletter here https://bit.ly/2HwVEA2 to join other 1000+ subscribers to get amazing tips, tricks and articles, discount coupons. 𝗗𝗼 𝗹𝗶𝗸𝗲 𝘁𝗵𝗶𝘀 𝗰𝗼𝗺𝗺𝗲𝗻𝘁, 𝘀𝗼 𝗜𝘁 𝘄𝗶𝗹𝗹 𝘀𝘁𝗮𝘆 𝗮𝘁 𝘁𝗵𝗲 𝘁𝗼𝗽.