Flux is an application architecture that Facebook uses internally for building the client-side web application with React. It is not a library nor a framework. It is neither a library nor a framework. It is a kind of architecture that complements React as view and follows the concept of Unidirectional Data Flow model. It is useful when the project has dynamic data, and we need to keep the data updated in an effective manner. It reduces the runtime errors.
Flux applications have three major roles in dealing with data:
1. Dispatcher
2. Stores
3. Views (React components)
Here, you should not be confused with the Model-View-Controller (MVC) model. Although, Controllers exists in both, but Flux controller-views (views) found at the top of the hierarchy. It retrieves data from the stores and then passes this data down to their children. Additionally, action creators – dispatcher helper methods used to describe all changes that are possible in the application. It can be useful as a fourth part of the Flux update cycle.

Structure and Data Flow

In Flux application, data flows in a single direction(unidirectional). This data flow is central to the flux pattern. The dispatcher, stores, and views are independent nodes with inputs and outputs. The actions are simple objects that contain new data and type property. Now, let us look at the various components of flux architecture one by one.

Dispatcher

It is a central hub for the React Flux application and manages all data flow of your Flux application. It is a registry of callbacks into the stores. It has no real intelligence of its own, and simply acts as a mechanism for distributing the actions to the stores. All stores register itself and provide a callback. It is a place which handled all events that modify the store. When an action creator provides a new action to the dispatcher, all stores receive that action via the callbacks in the registry.
The dispatcher’s API has five methods. These are:

SN	Methods	Descriptions
1.	register()	It is used to register a store’s action handler callback.
2.	unregister()	It is used to unregisters a store’s callback.
3.	waitFor()	It is used to wait for the specified callback to run first.
4.	dispatch()	It is used to dispatches an action.
5.	isDispatching()	It is used to checks if the dispatcher is currently dispatching an action.

Stores
It primarily contains the application state and logic. It is similar to the model in a traditional MVC. It is used for maintaining a particular state within the application, updates themselves in response to an action, and emit the change event to alert the controller view.
Views
It is also called as controller-views. It is located at the top of the chain to store the logic to generate actions and receive new data from the store. It is a React component listen to change events and receives the data from the stores and re-render the application.
Actions
The dispatcher method allows us to trigger a dispatch to the store and include a payload of data, which we call an action. It is an action creator or helper methods that pass the data to the dispatcher.
Advantage of Flux
• It is a unidirectional data flow model which is easy to understand.
• It is open source and more of a design pattern than a formal framework like MVC architecture.
• The flux application is easier to maintain.
• The flux application parts are decoupled.
So, this brings us to the end of blog. This Tecklearn ‘React Flux Concept’ blog helps you with commonly asked questions if you are looking out for a job in React JS and Front-End Development. If you wish to learn React JS and build a career in Front-End Development domain, then check out our interactive, React.js with Redux Training, that comes with 24*7 support to guide you throughout your learning period.

React.js with Redux Training

About the Course

Tecklearn’s React JS Training Course will help you master the fundamentals of React—an important web framework for developing user interfaces—including JSX, props, state, and events. In this course, you will learn how to build simple components & integrate them into more complex design components. After completing this training, you will be able to build the applications using React concepts such as JSX, Redux, Asynchronous Programming using Redux Saga middleware, Fetch data using GraphQL, perform Testing using Jest, successively Deploy applications using Nginx and Docker plus build Mobile applications using React Native. Accelerate your career as a React.js developer by enrolling into this React.js training.

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What you will Learn in this Course?

Introduction to Web Development and React.js
• Fundamentals of React
• Building Blocks of Web Application Development
• Single-page and Multi-page Applications
• Different Client-side Technologies
• MVC Architecture
• Introduction to React
• Installation of React
• JSX and its use case
• DOM
• Virtual DOM and its working
• ECMAScript
• Difference between ES5 and ES6
• NPM Modules

Components, JSX & Props
• React Elements
• Render Function
• Components
• Class Component
• Thinking In Components
• What Is JSX
• JSX Expressions
• Creating Your First Component
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React State Management using Redux
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• More about react-redux package
React & Redux
• The React Redux Node Package
• Provider Component
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• Normalization: Points to Keep in Mind When Designing a Redux Store
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React Hooks
• Caveat of JavaScript classes.
• Functional components and React hooks
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• How to write useState() hook when state variable is an array of objects
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• Fetch API data using useEffect() hook
• useContext() hook
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Fetch Data using GraphQL
• What is GraphQL?
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• Express framework
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• Apollo client
• NPM libraries to build client side of GraphQL
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React Application Testing and Deployment
• Define Jest
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Introduction to React Native
• What is React Native
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React with Redux Projects

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