I have been working on React components for a while and yesterday just did my first Flux example from https://github.com/tildedave/flux-feature-flags
Just wondering the scope of Flux. In Flux we have Stores, Dispatchers etc, are they available just for one React component, each React component has it's own Flux structure?
Or they are available globally? so the whole application shares Stores, Dispatchers etc, making them available to all React components used in this app
#stanleyli flux essentially a design pattern which tells us about how to have a one direction flow of data so that we can achieve interesting things like easy debugging, timeline, logging etc.
if you are interested in implementing flux on your own I would recommend to look into phrontend or redux.
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 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.
I am new to React so please excuse me if this is a noob question but I really could not find the answer in the DOCs or elsewhere.
Let's say I have two buttons with a counter that share the state but are far away from each other in terms of the placement in the UI.
The documentation says the common owner component for both buttons should own the state. It makes sense if the components are next to each other like in the example but what if my buttons are each part of a different UI group and are far away in terms of nesting? My state holder would be the root of the document and I would have to pass a handler function down through many layers. And what if I need to add new component somewhere else that also needs to know the state? Would I have to modify all the parent components in the way to pass the state down? That is tremendously impractical.
Without React I would have some global Subscribe/Publish pattern like jQuery Observer and all UI elements could subscribe/publish to it regardless of their nesting position.
How does React solve this?
Related question: If I need to load/save the state to DB, how do I pass a reference of the controller (or Whatever) to each React component that stores the state?
1 for global state you may use REDUX
Redux is a predictable state container for JavaScript apps
for connect/subscribe component with that state ,you should use react-redux
If components are far away in terms of nesting, you may connect/subscribe them to redux store, and take only neccessary part of state. They will update if only neccessary part is changed.
article that explains how you can do your case
to learn how to use redux you can watch this videos from creator of redux (Dan Abramov)
1.getting-started-with-redux
2.building-react-applications-with-idiomatic-redux
3.I definitely recommend to you discordapp rectiflux channel. because you allways can ask any question online.(there you can find contributors of that tools)
2 alternative way that less verbose then redux is MobX
MobX is a battle tested library that makes state management simple and scalable by transparently applying functional reactive programming (TFRP). The philosophy behind MobX is very simple:
Anything that can be derived from the application state, should be derived. Automatically.
I suggest to look at the Flux stores. In short, stores are like model in your application. You can listen to change (subscribe) and also modify their properties (publish). You can see how it was done in example app.
A better option is to go with Redux.
Redux is enabling use cases like yours in a way simpler fashion :)
It will help you with all the state and make your life much easier.
Some good resources for learning:
The Redux Website
Video courses from Dan Abramov, the creator [Free]
Awesome course on Udemy [Not free]
Building Applications with React and Redux in ES6
And finally take a look at this youtube series [Free]
Managing state in the middle layers of your app should be avoided where possible. This data belongs in a store, which holds the global state of the app. Then each component accesses the state via its props.
The naïve approach to get the data down to the component is to pass the store through all the layers of your app "manually", i.e. through props.
Smarter alternatives exist, which use connected components, that access the global state through the context (as opposed to the props). Typically, the presentational component (your button component) is wrapped in a container component that handles this connection to the store, then passes the data in via props.
There are numerous frameworks that facilitate this process, links to which are already provided in the other answers.
If you are trying to share simple states, try this ( I am the author): react-provide-state
Otherwise I will recommend Redux. It has become the most popular tool for managing application states.
In the applications being working on, we use Redux to manage the main application states and almost all other states. But we use 'react-provide-state' for simple, UI only states like Modal, Checkbox states.
I want to know if there is a NoSQL library or framework stack for React.js just like Angular and MongoDB. I dont really understand flux. So any comment will be helpful. Thank you.
flux is an application state container. Not something like mongoDB.
Flux lets you have an application wide state, not dissimilar to react component state.
mongoDB is a DB that persists. Only data that defines current application state should go into the flux store. It does NOT persist.
Application state example
Suppose you are using react to build a game using multiple components.
React components have a uni directional flow of data from parent to child as props.
So if the child component decides to advance you to next level, all it has to do is, change the game level stored in application state and the parent component can read from the store and do the needful for new level.
Flux is basically a library that makes it easier to have an application wide state. Since the component state is limited to a single component.
There is another library that helps you manage application state called redux. http://redux.js.org/
It's easy to understand :)
PS: You can use mongoDB or Redis or any DB for that matter in your backend. Flux is not your db. Personally, I'd rather use Redis.
I believe angular is a framework. Whereas React is a library. You have the freedom to choose the technologies you want to pair it up with.
On my Angular JS preparation; I came to know about ReactJS which is built on top of Flux and then heard about Redux. Now wondering how AngularJS related to ?
React is not built on top of flux. Flux is a pattern (and later, the facebook/flux repo was created as an implementation of that pattern) for handling global application state, and is not specific to React, but works well with React's "state trickles from the top" philosophy. It was also developed at Facebook to be used with React.
Redux is a (different) JavaScript library for managing global application state changes, and shares some similarities with the flux design pattern, but is ultimately a different thing entirely.
None of these things have any direct relation to AngularJS.