I know that there is so many answers in this question.
Anyone explain to me how Redux help your React JS Application more flexible when you are creating a Front End Web Apps.
Thank you in Advance.
From Redux documentation:
From the very beginning, we need to stress that Redux has no relation
to React. You can write Redux apps with React, Angular, Ember, jQuery,
or vanilla JavaScript.
That said, Redux works especially well with libraries like React and
Deku because they let you describe UI as a function of state, and
Redux emits state updates in response to actions.
It's a state management library with a huge ecosystem which lets you more easily set the state for your components across whole application, manage side-effects and many more.
I recommend redux author course about redux. At later part of the course, he explains how to use it with React.
Redux is used to manage the state of the component and it supports single state management system, where as flux is a multiple state management system.
Redux uses dispatchers to dispatch the payload(data) via reducers.
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 had an interview, where the interviewer asked me if redux uses context API internally. Pls provide a detailed description if yes. Thanks
Redux doesn't use context api, it's a javascript library for state management. You can use Redux with any application- like (react, angular, vue, svelte, etc). However, for using redux with react applications, you need react-redux which is the official react bindings for redux.
react-redux uses React's context api to make the redux store accessible to all components. The reason why you need react-redux is because, React uses virtual dom - which means you can't manipulate the DOM directly. In other libraries like angular, we use the NgRx library (For angular).
Internally, React Redux uses React's "context" feature to make the
Redux store accessible to deeply nested connected components. As of
React Redux version 6, this is normally handled by a single default
context object instance generated by React.createContext(), called
ReactReduxContext.
Source
Yes, but differently than if you would be doing it by yourself.
If you were to use Context manually, you would usually do value propagation - passing the current state value down the tree. This can lead to very inefficient rerendering behaviour. See this article for a deeper explanation.
React-Redux on the other hand uses context for dependency injection. The store is passed down the tree and will never change, never triggering a rerender. All the rest is done by Redux internally, using manual subscriptions. This is much more performant.
I have some Question in mind while switching to context API in react js .
What is the advantages of New context API in React js .
Can we use Redux along with context api ?
What are the overcome of context api on redux if any ?
so here is the answers to your questions.
With context react now have builtin support for state management so you don't need third party lib like redux or mobx.
Yes, you can but not required, however, you can use reducers with context to handle complex state management.
Less boilerplate code, especially with hooks and not dependency on third party lib and for small project context, makes it very simple and easy.
If you are looking for example then I created this repo to demo and check other branches to explore more ways of using context.
https://github.com/smkamranqadri/react-hooks-context-todo
I've just setup my Redux store in React native app.
I moved to initialize React navigation for my project, i though that, as long as i'm using Redux to manage my app state, then the default option is that redux also is taking care of Navigation, and it should be hooked up to Redux, i opened React navigation docs, it says literally:
"Think twice before you consider doing this, there is an incredibly good chance that you do not need to do t his!"
So, is it a good practice to manage navigation with Redux, or just implement basic navigation the normal way (outside Redux) ?
Thanks in advance.
React Navigation manages its own state internally (using its own redux store I think...). There's no real need to connect react-navigation state to your own app's redux store since they expose API to do everything you might need to even without the navigation prop. Also it looks like they're dropping support for redux integration in the next version so beware of deprecation.
This is one of those cases where people may introduce unnecessary complexity and research into the project just to be happy about how "neat" the code runs even when it doesn't offer any real deliverable.
React 16.7 has State Hook,so I do not need react-redux anymore,is that right?
To my understanding so far, Hook API is still not fully compatible with redux, and supporting for redux is under development. There is a thread in Github for the implementation of useRedux method.
Meanwhile, I think react-redux is still a better choice at the moment, since its API is already optimised for React app's performance. Implementing your own comparing function for re-rendering logic based on updates of redux store's data is too much for small & medium size projects.
For global state still the react-redux is recommended way.
Use react-redux for disconnected components where need to access share state(global state).
Use react state for form-like components(local state)