React functional component access entire state

All we need is an easy explanation of the problem, so here it is.

In a classical component the entire state is available as a single object this.state = {}, I was wondering if there’s a similar way you could access the state in a functional component? You can access individual properties via their variable names but I’m wondering if there’s a way to access all of them at once as if they were stored in an overarching object, similar to a class component.

How to solve :

I know you bored from this bug, So we are here to help you! Take a deep breath and look at the explanation of your problem. We have many solutions to this problem, But we recommend you to use the first method because it is tested & true method that will 100% work for you.

Method 1

No, there’s no consolidated state object you can get access to that has all of the state members you’ve set up via useState.

You could store all of your component state in a single object if you want (this is even mentioned in the useState docs when talking about callback updates). For instance:

const [state, setState] = useState({
    name: "",
    profession: "",
    age: null,
    // ...
});

To update any individual state member, you have to handle creating the entire new object yourself (state setters from useState don’t do the merging that Component.prototype.setState does). For instance, setting the age:

setState(state => ({
    ...state,
    age: 42,
}));

It’s important to use the callback form (as is always the case when setting state based on existing state).

But unless you do that, no, there’s no one single object you have access to.

Note: Use and implement method 1 because this method fully tested our system.
Thank you 🙂

All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0

Leave a Reply