Recently I had learnt react-redux, I use it to manage state in my website. But I find some interest in react suspense, but seem like suspense is a feature that killing redux. (Maybe) and might cause problem if using together.
For example, if I want to perform async to change state and update the store. Where should I apply the suspense “feature” and redux store update.
I know my question is a bit confusing but I hope you can understand what I said.
Anyone know how to manage state in react SAP if I want to use react suspense? Is only usecontext is usable?
One way you can use suspense and redux together is by using a Suspense library that integrates with redux like Rest Hooks
Suspense and redux are distinct concepts that can be used independently, or together.
Suspense simplifies asynchronous handling, allowing co-location of data dependencies, which makes components independent from their render location, and thus reusable.
Redux enables one centralized store tree, which can be useful when combining information across desperate concepts in a centralized stream.
Related
What is the basic difference between react and redux? is react and redux is same? why we should use redux? Finally why it's called react-redux?
I want to know this i just confused between this two.
You must be pretty new to web development. First of all, welcome !
React and redux are pretty different beasts, but have often been used together to make state management easier in React apps.
React is a front-end web framework, it allows you to create a wide range of web apps using JSX (React's way of fusing Javascript and HTML). This is a gross oversimplification, I encourage you to read the documentation.
Redux is a state management library. With it, you can define one or many stores, containing a state (basically an object that holds any data you need), actions (methods to alter or retrieve the current value of the store) and to subscribe the state's changes at a global level. Again, the Redux documentation should have most of the answers you're looking for.
React and redux are often used together, mainly through the use of the react-redux package, since Redux offers a global, reactive state, enabling you to share data between React components anywhere in your app without having to pass props.
Now tough, you could achieve similar functionnality without Redux entirely, using React's own Hook and Context APIs. Although the logic behind these is a bit more involved, it allows for far more flexibility.
I have a problem and I'm recently researching about Clean Architecture. That is:
I know that when I want to use Redux in React I will have to do like this:
ReactDOM.render(
<React.StrictMode>
<Provider store={store}>
<App />
</Provider>
</React.StrictMode>,
document.getElementById('root') )
and then, I use useSelector and useDispatch (hooks) to select data and dispatch an action... in my react components.
But, I see an problem (in my opinion). That is my react application is highly coupled with this state management tool (redux).
So, if in the future, Redux becomes outdated or I don't want to use redux, I want to use Recoil, MobX or new modern state management tools, etc... Or maybe, in my app, I want to use redux combined with others (Recoil,...) to manage my app state. So, I want a loose coupling between react and redux.
But, I see very few people talking about this issue. Or maybe I was searching for the wrong keywords. Or is there something wrong with my way of thinking about 'Separation of concerns' in react and redux.
Can anyone give me a fresh look at this issue?
PS: My English is not good. I hope everyone can get my issue? Thanks a lot.
I had experience with both main React state managers: Redux and Mobx and struggled with the same question.
One possible solution might be to wrap state manager logic with your custom hooks which will receive redux state and trigger actions.
But if you one day decide to switch to, say, Mobx, you will see that:
Mobx reactivity works in a different way than in redux.
First, you will face the necessity to wrap your components in observer function which adds coupling to your components. Besides, it will take some effort to refactor your components to make it Mobx compatible because Mobx reactivity relies on value dereferencing. You can read about it in Mobx documentation. https://mobx.js.org/understanding-reactivity.html
As i see, you can't make your components fully state-manager-agnostic if they rely on business logic.
Anyway, state receiving and state updating logic will be present in your React components and it will take some time and effort to put your project on the new rails.
The only option i see is to split React components into two types:
Container component.
All state-manager logic goes here. It receives application state chunks, triggers actions, and passes props to UI-components.
UI-component
Component that builds DOM-elements. It may have its own state, but mainly render logic is based on component props.
This will allow you to reduce costs from changing state-manager in the future, because you can gradually rewrite your container components without worrying too much about UI.
I have been working in React for past 6 months and do not have any experience with Redux yet. Though I have worked with context api and useReducer hook. I need to convert an existing application to react which will have around 100-120 components. My question is about the choice of state management. With the rise of context api and useReducer hook, Can I rely on these two only Or Redux library is still a better choice ? Articles that I found for comparison are from late 2019 so I couldn't decide.
Please guide
Redux is still a much better choice for large scale.
Let's assume you have 10000 global state variables in the global store. And you need to change one.
Context API
It will rerender all of its consumer components which is unnecessary.
Redux
It allows us to selectively rerender components that subscribed to changed values.
So
Context API is good for small scale but not good for large scale.
Fundamentals are still same for context API before and after useReducer.
I think useReducer and contextAPI should be good enough even for large applications if you don't want the time travel that Redux provides out of box, as a by-product of its design.
For large applications, one could have a large state (or multiple reducers combined via combiner) in Redux, and yet avoid re-rendering of components. This is because components are rendered based on parts of state that it depends upon, using the mapStateToProps and mapDispatchToProps magic. With contextAPI and useReducer one designs global state by breaking it up into Providers such that only the sub-tree affected by a particular sub-part of global state is passed that part of global state via its own provider.
Check this out: https://kentcdodds.com/blog/application-state-management-with-react
No practical purpose to this question, just tryna connect concepts to get my head around switching from Redux to using useReducer and React contexts - is a Context when used with useReducer` basically a redux store that's only available to components that explicitly import it?
No. Context and Redux are very different tools that solve very different problems.
Context is simply a mechanism to make a single value accessible to a portion of your component tree. It's up to you to write the code that determines what that value is and how it gets updated. This is typically done by storing data in React component state, and creating a value that is passed to a <MyContext.Provider>.
Redux is a separate UI-agnostic state management library that is designed to help you write predictable state update logic and track when, where, why, and how your state has updated over time, with the React-Redux UI bindings layer allowing your React components to interact with that Redux store.
Now, yes, useReducer+useContext do have some similarities to Redux in terms of how your component will interact with them, but they also have very different performance characteristics in terms of when and why your components will re-render.
Please see my extensive post on A (Mostly) Complete Guide to React Rendering Behavior and my additional posts Redux - Not Dead Yet! and React, Redux, and Context Behavior for details on how Redux and Context differ and how
It is not hard to implement the exact logic of react-redux by means of useContext, useReducer and maybe useSelector)
But useContext + useReducer is not a full replacement of Redux.
useReducer is just an alternative to useState.
And useContext comes with https://en.reactjs.org/docs/context.html#caveats
To store multiple values you have to https://en.reactjs.org/docs/context.html#consuming-multiple-contexts
Which technique is better for state management in react app?
Actually I want to create a big app where I've to manage my state which technique is optimal for state management context, Redux or react custom hook?
I am personally more inclined towards Redux. But if you are a beginner trying to learn Redux you might have some hard time until you understand it. Once you get it you will also like it. Rather than building your own custom hook, It's better to use Redux as if anything goes wrong/you are struck with something, you have community to support and You can also dispatch async calls using some middleware libs like redux-thunk, etc. You can use Redux with forms as well. I guess if you end building your custom hooks you might end up wasting time, taking care of all these.
Of course, it is better to go ahead with Redux, because it is easier to handle large applications with Redux. It has only a single store, which is basically a javascript object. You can divide the store into many pieces, each piece will be for a particular part of the application. All these pieces will be joined together using the combineReducers function provided by redux.
React is a state management library and with the release of React hooks and massive improvements to React context this method of state management has been drastically simplified.
I think in 99% of the situations we do not need redux and add one layer of complexity to project.
For big scale app maybe redux is better choice. but if you choose React for state management you need good information about some concepts and this concepts is:
Local state vs global state(some component needs local state and putting all of their state in global state leads to a lot of problems)
react context and prop drilling problem and How to use React Context effectively
react hooks especially useReducer and useContext
immutable state
You would always need to ask yourself the question: Do i need an additional library?
Redux is on its decline in popularity, due to improvements on Reacts native state management. There is a reason for that!
If you want to work for a company thats not brand new, there is a chance you have to use redux. I was fortunate enough to convince my team to use our own state management library build only with React.useState under the hood.
If your application state logic is quite simple, meaning: states are mostly local, shared state are mostly between parent-child relationship and different states are not heavily depending on each other, then I recommend only using React useState and useReducer (in case you like to use reducers).
Once your application state is getting complicated, you need to have some sort extra stuff of global state management.
The most important thing you need to know about React.useState is, that the returned setState function is your connection to that components state. Lets assume we can take that function out of the component and use it somewhere else. This way you have a function to update your state from outside of your component.
export let exportedStateSetter;
const Component = () => {
const [state, setState] = useState();
useEffect(() => {
exportedStateSetter = setState;
return () => exportedStateSetter = undefined;
});
return <div>{state}</div>
};
In the example above, you can now import the exportedStateSetter and use it somewhere else to update the state of this Component.
!This is not a best pracitce example, this is a simple visualization.
When you think very critically about this, you will realize that now you know how to set a components state from outside of a component, you know how to set states globally.
I stringly recommend using this approach to either build your own global state library or use some that i have created based on what i explained:
npm install --save react-global-state-hook // simple
npm install --save rx-global // complex
To wrap it up: Dont use Redux, if not required by a job. You can always use Redux conventions, by seperating state into stores, update state with a reducer and actions that interact with the state. For that you can use native React state management, if not only React.useState when used properly. React provides you with everything you need and everything you need to build yourself.
I had the best developer experiences with my own libraries that evolved over time. It forces you to understand state management in general and the framework you are using.
Im open for any feedback on the 2 libraries and if you have any questions regarding state, please feel free to keep posting.