Adelle  Hackett

Adelle Hackett

1604127166

Implementing Redux in React

Redux is a state management library, it establishes the idea of a centralized global state and prevents components from directly accessing and altering the information stored in the global state. By doing so, it establishes a uniform flow of information, unlike React where information flows up and down a component tree. Components are provided with the ability to trigger an update event by dispatching an action that informs a receiver function known as a reducer of the specific way the state should be updated. The reducer uses the information stored in the action, updates the state and the component is then, and automatically, provided with the updated information via its subscription to the global state. After understanding this basic flow, you can begin implementing Redux. To start off, you will have a few libraries:

npm i --save redux react-redux

Here we are first installing the Redux library and the second library “react-redux” connects Redux and the global state to the React application. After this is done, we can begin configuring the React application.

// index.js

import React from 'react';
import ReactDOM from 'react-dom';
import { createStore } from 'redux';
import { Provider } from 'react-redux';
import App from './App';
import reducer from './store/reducer';
const store = createStore(reducer);
const app = (
  <Provider store={store}>
    <App />
  </Provider>
);
ReactDOM.render(app, document.getElementById('root'));

Let’s breakdown the first step. Redux is configured within the same file that React is set up, in the index.js file. First, the “createStore” function is imported which, as the name implies, helps to create the central store or the global state for Redux. Next, the “Provider” helper component is imported which helps to connect the React application to Redux, giving it access to the global state. Afterward, an import of a placeholder “reducer” is made for the sake of setting up the initial configuration within the index.js file. The import accesses a reducer file from a directory named “store.” This is the convention to create a directory named store that will contain all Redux code. Next, the global state is created using the createStore function, and it takes in as an argument the reducer, not yet created, that was imported, which will connect the reducer to the created global state. Finally, the Provider helper component wraps the App component allowing the React application a connection to Redux and its global state. Also, note that the Provider component takes in a mandatory prop called store and is passed the store that was created with the createStore function, and the reducer passed as an argument. With this, the React application is now connected to Redux.

After configuring Redux, we move to actually creating the reducer.js file within a directory named “store” which will contain all Redux-related code.

// within src/store/reducer.js

const initialState = {
  someProp: someValue,
  anotherProp: anotherValue
};
const reducer = (state=initialState, action) => {
  switch(action.type) {
    case 'SOME_ACTION':
      return {
        ...state,
        someProp: someValueUpdated
      };
    case 'ANOTHER_ACTION':
      return {
        ...state,
        anotherProp: anotherValue + action.actionPayload
      };
    default:
      return state;
  }
};
export default reducer;

Alright to start off, a reducer acts on the global state, updating it based on the information it receives from an action. And in order for a reducer to begin updating the global state, it needs to be defined. To do this, an initial state can be created with some starting properties. Next, the reducer function is defined, and it takes two arguments, the initial state and the action that will inform it on how to update the global state. By convention, the reducer is written with a switch statement and will return a new state with some update based on the type of change stored in the action. Also to note, the action types or the type property on the action object stores an all upper case string, again this is the convention. In the case of ‘ANOTHER_ACTION’, the state is updated using a payload which is simply another property, besides the type property, on the action object. That property holds some value that is used in some way to update the global state. With this, the reducer is set up and exported and has been configured within the index.js file. Now all that is left is to connect, or subscribe, the React component to the Redux state.

#web-development #javascript #redux #react #developer

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Implementing Redux in React
Autumn  Blick

Autumn Blick

1598839687

How native is React Native? | React Native vs Native App Development

If you are undertaking a mobile app development for your start-up or enterprise, you are likely wondering whether to use React Native. As a popular development framework, React Native helps you to develop near-native mobile apps. However, you are probably also wondering how close you can get to a native app by using React Native. How native is React Native?

In the article, we discuss the similarities between native mobile development and development using React Native. We also touch upon where they differ and how to bridge the gaps. Read on.

A brief introduction to React Native

Let’s briefly set the context first. We will briefly touch upon what React Native is and how it differs from earlier hybrid frameworks.

React Native is a popular JavaScript framework that Facebook has created. You can use this open-source framework to code natively rendering Android and iOS mobile apps. You can use it to develop web apps too.

Facebook has developed React Native based on React, its JavaScript library. The first release of React Native came in March 2015. At the time of writing this article, the latest stable release of React Native is 0.62.0, and it was released in March 2020.

Although relatively new, React Native has acquired a high degree of popularity. The “Stack Overflow Developer Survey 2019” report identifies it as the 8th most loved framework. Facebook, Walmart, and Bloomberg are some of the top companies that use React Native.

The popularity of React Native comes from its advantages. Some of its advantages are as follows:

  • Performance: It delivers optimal performance.
  • Cross-platform development: You can develop both Android and iOS apps with it. The reuse of code expedites development and reduces costs.
  • UI design: React Native enables you to design simple and responsive UI for your mobile app.
  • 3rd party plugins: This framework supports 3rd party plugins.
  • Developer community: A vibrant community of developers support React Native.

Why React Native is fundamentally different from earlier hybrid frameworks

Are you wondering whether React Native is just another of those hybrid frameworks like Ionic or Cordova? It’s not! React Native is fundamentally different from these earlier hybrid frameworks.

React Native is very close to native. Consider the following aspects as described on the React Native website:

  • Access to many native platforms features: The primitives of React Native render to native platform UI. This means that your React Native app will use many native platform APIs as native apps would do.
  • Near-native user experience: React Native provides several native components, and these are platform agnostic.
  • The ease of accessing native APIs: React Native uses a declarative UI paradigm. This enables React Native to interact easily with native platform APIs since React Native wraps existing native code.

Due to these factors, React Native offers many more advantages compared to those earlier hybrid frameworks. We now review them.

#android app #frontend #ios app #mobile app development #benefits of react native #is react native good for mobile app development #native vs #pros and cons of react native #react mobile development #react native development #react native experience #react native framework #react native ios vs android #react native pros and cons #react native vs android #react native vs native #react native vs native performance #react vs native #why react native #why use react native

Reduce Redux Boilerplate Code with Redux-Actions

Redux has become one of the most popular libraries in front-end development since it was introduced by Dan Abramov and Andrew Clark in 2015. They designed it as the successor for Flux, with the support of some developer tools and a few more concepts embedded in it.

Flux is a fancy name for observer pattern further modified to support React. Both Flux and Redux consist of similar concepts like Store, Actions (events in the application). In other words, Flux is a simple JavaScript object but with some middleware like redux-thunk. It can be a function or a promise for Redux. However, Redux is a single source of truth with concepts like immutability, which improve performance. It is one of the main reasons for Redux to dominate in State Management.

Image for post

Flux vs Redux comparison source: enappd.com

Despite its advantages, some developers have found it rather challenging to deal with Redux due to the amount of boilerplate code introduced with it. And the complexity of the code seems to be another reason for the difficulty.

In this article, we will look at how to reduce the boilerplate code brought about by Actions and Reducers using Redux-Actions

#react-redux-boilerplate #react-redux #react #react-actions #redux

Karine  Crooks

Karine Crooks

1589960215

A Basic Redux Setup in React/React Native

Redux is a powerful state management tool that can be very useful as your React or React Native application grows and requires you to keep track of more state. How you want to set up Redux is up to you, but if you’re a beginner, it may be easiest to learn the flow of Redux with a step-by-step walkthrough. Here I’ve outlined a basic way to set up Redux to go along with this post and it will be the same for React and React Native.

#react #react-native #redux #react-redux

Aubrey  Price

Aubrey Price

1590485641

Accessing Redux from Components In React & React Native

How to set up a basic version of Redux in your React or React Native application. To make things clearer, I based my setup on my event application, where users create events that other users attend. We generated the action creators, reducers, and Redux store, and wrapped the application in a provider. Today I’ll finish the loop and talk about how to access the Redux store in your application using both class and functional components. The provider we added to the root component provides the store to all the components in your application. Therefore, we will just look at how to access the store from an individual component.

#react-redux #redux #hooks #react #react-native

Eliseo  Kutch

Eliseo Kutch

1625104440

React JS Tutorial - 8 - React Redux Implementation

In this video, we will create redux store, share data among react js components via redux store

#react #react js #react redux implementation