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    React Progressive Web App: Learn it All Here!

    Introduction About React Progressive Web App

    If you are not aware of React Progressive Web App then you are not late. PWA in modern years has developed to be the most adopted optimization. It has become a tactic in the software industry.

    So not only optimization merits but abundance lot of goodies:

    Progressive improvement: It functions for every user irrespective of the browser choice of the user. So your app will work perfectly on a wide choice of browsers. Also, it will degrade gracefully when certain functionalities are not available. Moreover, it delivers a decent user experience.

     

    Native-like familiarity: It delivers a mobile-like experience. It is a web app but it feels like you are working with an iOS /Android app.

     

    Responsiveness: It can counterpart to fit any screen size be it an iPad, desktop, tablet, or mobile. It mechanically adjusts to balance for either a narrow space or a new space.

     

    Offline sustain: Your app can function here offline.

     

    Push Notifications: PWAs are appealing with the tint of push notifications. They give you a notification to notify you about a friend request, news messages, current news, or any other stuff. So you will feel the need to reply to the notification. It could be to respond to the message, read the reports, check for a friend, and initiate the app again. Hence engaging you with the web app.

     

    Service Workers

    Service Workers is a kind of Worker that allows running scripts in the background of the browser. It is like an employee-in-the-middle between the network and the browser. The major work of Service workers is to assist our cache and provide the cached files. This will offer an uninterrupted easy experience. Service workers permit developers to handle resource caching more effectively. So that users don’t have interruptions even if they disengage from the internet.

     

     What Are Service Workers? How They assist develop the Performance?

    In general web apps, we can only steer through our website. If we are associated with a network, without the network we will Observe the default “Network error: Page cannot load” or the little dinosaur game. The service workers have altered the game.  With service workers, we could cache our website pages but different resources that make up our web pages, unlike the text. The workers could cache webpage resources in fresh storage known as Cache Storage. We could go offline kick in the service workers and provide the cached pages in the Cache Storage.

    We now know how service workers function in the above section. But the question is: What is the improvement in the React Progressive Web App acronym?

    Progressive Web App

    Progressive Web App (PWA) is a phrase used to imply a modern software development methodology. Unlike conventional applications, progressive web apps are a mixture of regular websites (or web pages) or a mobile application. This new application model tries to merge features given by modern browsers with the merits of mobile experience.

    Many of the PWA features are not yet supported in numerous browsers. While many features will be present in the future. You don’t have to apply all the features. If your browser doesn’t sustain app manifest but carry Cache Storage, you can leave the app manifest. You can begin with the Cache Storage, but in the future, your browser (on update) finally supports app manifest you can add that feature for your convenience.

    You see, you keep improving as more features are new to your browser without a total arrest and halt for your browser to completely support all the features.

     

    The Pusher

    We’ll also have to create a server that will assist with triggering events to Pusher.  We will create one with Node.js. In the root of your directory, project; make a file named server.js and write in the following code:

    // server.js
        const express = require(‘express’)
        const path = require(‘path’)
        const bodyParser = require(‘body-parser’)
        const app = express()
        const Pusher = require(‘pusher’)
        //initialize Pusher with your appId, key, secret and cluster
        const pusher = new Pusher({
            appId: ‘APP_ID’,
            key: ‘APP_KEY’,
            secret: ‘APP_SECRET’,
            cluster: ‘YOUR_CLUSTER’,
            encrypted: true
        })
        // Body parser middleware
        app.use(bodyParser.json())
        app.use(bodyParser.urlencoded({ extended: false }))
        // CORS middleware
        app.use((req, res, next) => {
            // Website you wish to allow to connect
            res.setHeader(‘Access-Control-Allow-Origin’, ‘*’)
            // Request methods you wish to allow
            res.setHeader(‘Access-Control-Allow-Methods’, ‘GET, POST, OPTIONS, PUT, PATCH, DELETE’)
            // Request headers you wish to allow
            res.setHeader(‘Access-Control-Allow-Headers’, ‘X-Requested-With,content-type’)
            // Set to true if you need the website to include cookies in the requests sent
            // to the API (e.g. in case you use sessions)

     

    res.setHeader(‘Access-Control-Allow-Credentials’, true)

     

    res.setHeader(‘Access-Control-Allow-Credentials’, true)
            // Pass to next layer of middleware
            next()
        })
        // Set port to be used by Node.js
        app.set(‘port’, (5000))
        app.get(‘/’, (req, res) => {
            res.send(‘Welcome’)
        })
        // API route in which the price information will be sent to from the clientside
        app.post(‘/prices/new’, (req, res) => {
            // Trigger the ‘prices’ event to the ‘coin-prices’ channel
            pusher.trigger( ‘coin-prices’, ‘prices’, {
                prices: req.body.prices
            });
            res.sendStatus(200);
        })
        app.listen(app.get(‘port’), () => {
            console.log(‘Node app is running on port’, app.get(‘port’))

     

    (courtesy-https://medium.com)

     

    What is Manifest?

    The manifest is a very simple format with a set of rules and regulations. Manifest actually informs your browser how your app should work when “installed” on the desktop or user’s mobile. Using or having a manifest is both required and needed.
    This is how any manifest.json would look like:

    Take a look-

    {
      “short_name”: “GemPuzzle”,
      “name”: “GemPuzzle”,
      “icons”: [
        {
          “src”: “favicon.ico”,
          “sizes”: “64×64 32×32 24×24 16×16”,
          “type”: “image/x-icon”
        },
        {
          “src”: “logo192.png”,
          “type”: “image/png”,
          “sizes”: “192×192”
        },
        {
          “src”: “logo512.png”,
          “type”: “image/png”,
          “sizes”: “512×512”
        }
      ],
      “start_url”: “/”,
      “scope”: “/”,
      “display”: “standalone”,
      “theme_color”: “#50e3c2”,
      “splash_pages”: null,
      “background_color”: “#ffffff”

    (courtesy- https://koala42.com)

     

    ))

    (

    Merits of React Progressive Web Apps

    • Progressive and developing enhancement. It will make any web app experience reliable and faster. Also, it certainly doesn’t break functionality for the ones that don’t have support.
    • For all platforms, it has a single codebase.
    • Much cheaper to maintain and build
    • All clients will be automatically present on the latest version
    • There is no upfront installation needed to use the app
    • Easy to share and find

     

    Demerits of React Progressive Web Apps

     

    • It is still a new technology so many browsers don’t sustain it fully yet
    • It will have more limited hardware access
    • The performance will be limited to computation heavy operations.

     

     

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