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
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'm developing a React component library for a web site. For local development I use Storybook. I think bit can be a good tool (better than npm link) for exporting library components and import them into the web site repo. Now the problem is that I'm using global context for some components but bit components must be isolated and self-sufficient. I don't want to wrap all my tiny components that use global context only to render them on bit.dev!
I have been able to resolve the same problem with storybook using decorators. So, I define a component without wrapping it with a ContextProvider and then in the stories file I use a decorator that wraps my component with the ContextProvider.
Is there a way to wrap bit components with global context provider without wrapping the actual component that will be used in production web site where a single global context provider wrap the entire app? What about best practices about this kind of workflow?
Using global context when implementing reusable components is not recommended.
Not only when using Bit, but when another project consumes a component it needs to have the same exact context for the component to work. Making the component less reusable and attractive to consumers.
The fact that this is not comfortable for rendering examples on the playground in bit.dev is a side-effect for it.
What you can do is either decouple the state from the component and use the params to get state and actions directly, via APIs. Or you can encapsulate the state inside the component.
You can read more about it in Bit's best practices for building reusable components - https://docs.bit.dev/docs/best-practices#state-managers
and also here - https://github.com/Tallyb/reusable-components-styleguide#globals
I'm using axios.get() to call an api endpoint in one of my components. I need the ability to encapsulate this endpoint call so I can reuse this implementation by calling it from several different components.
What is a generally acceptable way to structure this type of implementation in a React project? For example, would it be generally acceptable to group related api calls into js files in a src/services directory at the same level as src/components?
It would be acceptable to create a utils or services directory and group related API calls. However it is important to remember that with async requests you need to consider the components calling the api service utils might un-mount. This might result in warnings or errors if not handled properly. A possible way to handle this might be to only execute callback functions if component is still mounted tracked via a state variable in a useEffect hook.
A more modern react approach might be to leverage hooks and react context for data handling. You could create a DataContext with a useReducer hook to fetch or push data for example.
(see https://reactjs.org/docs/context.html)
There are many way to do this.
Redux. It's old way is that you need to use redux style.
Hooks. Starts from React 16.8 version.
I will recommend to you use hooks. It's more useful and guarantee true way.
3 years ago i lived in Redux paradigm and every time write the monkey code thinking about consistent Redux store state.
Please try this one react-async package.
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.