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Progressive Web Apps with React.js and Firebase

Jimmy Moon
May 20, 2017
100

Progressive Web Apps with React.js and Firebase

Jimmy Moon

May 20, 2017
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  1. PWA w/React.js
    &
    Firebase

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  2. +JimmyMoon
    @ragingwind

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  3. - Simple PWA with React.js
    - App Shell Architecture
    - Web Manifest
    - Service Worker
    - Firebase
    - Tuning on PRPL
    - Auditing by Lighthouse

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  4. - create-react-app
    - (react-scripts < 0.9.5)
    - Webpack > 2.4.x
    - PWA features
    - Minimal snippets
    - One of the app for guiding PWA

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  6. create-react-app

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  7. > yarn init && tree .
    └── package.json

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  8. > touch public/index.html && tree .
    └── public
    └── index.html

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  9. name="viewport"
    content="width=device-width, initial-scale=1"
    />

    name="theme-color"
    content="#0A0A0A"
    />
    ./public/index.html

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  10. > mkdir -p src/components/
    > touch ./src/components/App.js \
    ./src/main.js

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  11. > tree .
    └── src
    ├── components
    │ └── App.js
    └── main.js

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  12. > yarn add react react-dom

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  13. import React from 'react';
    import ReactDOM from 'react-dom';
    import App from './App.js';
    ReactDOM.render(,
    document.getElementById('app'));
    ./src/main.js

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  14. import React from 'react';
    class App extends React.Component {
    render() {
    return (
    Hello World !!
    );
    }
    }
    ./src/components/App.js

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  15. ...




    ...
    ./public/index.htm

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  16. > yarn add --dev webpack \
    webpack-dev-server
    > touch webpack.config.js

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  17. module.exports = {
    entry: {
    main: ['./src/main.js'],
    },
    output: {
    path: path.resolve( __dirname, './build'),
    filename: '[name].js'
    }
    ...
    };
    ./webpack.config.js

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  18. module.exports = {
    ...
    devServer: {
    contentBase: './public',
    inline: true,
    host: 'localhost',
    port: 8080
    }
    };
    ./webpack.config.js

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  19. ...


    ...
    ./public/index.html

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  20. > yarn add --dev babel-core \
    babel-loader \
    babel-preset-react-app
    > touch .babelrc

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  21. {
    // babel preset for react app
    // made by facebook
    "presets": ["react-app"]
    }
    ./.babelrc

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  22. module.exports = {
    ...
    module: {
    loaders: [{
    test: /\.(js|jsx)$/,
    include: path.resolve( __dirname, './src'),
    loaders: 'babel-loader'
    }]
    }
    };
    ./webpack.config.js

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  23. {
    ...
    // add dev server and build script to package.json
    "scripts": {
    "start": "NODE_ENV=development webpack-dev-server",
    "build": "rm -rf build && NODE_ENV=production webpack -p"
    },
    ...
    }
    ./package.json

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  24. > yarn start

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  25. View Slide

  26. App Shell 

    Architecture

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  28. View Slide

  29. > yarn add material-ui \
    react-tap-event-plugin
    > touch ./src/components/AppShell.js

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  30. import reactTabEventPlugin from 'react-tap-event-plugin';
    reactTabEventPlugin();
    ./src/main.js

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  31. class AppShell extends React.Component {
    render() {
    return (

    {React.cloneElement(this.props.children)}

    );
    }
    };
    ./src/components/AppShell.js

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  32. import {MuiThemeProvider, getMuiTheme} from 'material-ui/styles';
    import {AppBar, Drawer, MenuItem} from 'material-ui';
    ./src/components/AppShell.js

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  33. constructor(props) {
    // drawer open flag
    this.state = {open: false};
    }
    ./src/components/AppShell.js

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  34. render() {
    return (






    ...


    );
    }
    ./src/components/AppShell.js

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  35. ...
    handleDrawerToggle = () => this.setState({open: !this.state.open})
    handleRequestChange = open => this.setState({open: open})
    ...
    ./src/components/AppShell.js

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  36. class App extends React.Component {
    render() {
    return (

    Hello World !!

    );
    }
    }
    ./src/components/AppShell.js

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  37. View Slide

  38. Web Manifest

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  39. > npm install -g pwa-manifest-cli
    > pwa-manifest ./public \
    --icons=ICONPATH_LOCAL_OR_HTTP

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  42. View Slide

  43. > tree -L 3 ./public
    ├── favicon.ico
    ├── icon-144x144.png
    ├── icon-192x192.png
    ├── icon-512x512.png
    ├── index.html
    └── manifest.json

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  44. {
    "name": "react-pwa",
    "short_name": "react-pwa",
    "icons": [
    {
    "src": "icon-144x144.png",
    "sizes": "144x144",
    "type": "image/png"
    },
    ...
    ],
    "start_url": "./?utm_source=web_app_manifest",
    "display": "standalone",
    "orientation": "natural",
    "background_color": "#FFFFFF",
    "theme_color": "#3F51B5"
    }
    ./public/manifest.json

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  45. ./public/index.html

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  47. Service Worker

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  48. View Slide

  49. > yarn add --dev \
    sw-precache-webpack-plugin-loader \
    copy-webpack-plugin

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  50. const CopyWebpackPlugin
    = require('copy-webpack-plugin');
    const SWPrecacheWebpackPlugin
    = require('sw-precache-webpack-plugin-loader');
    ./webpack.config.json

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  51. plugins: [
    new CopyWebpackPlugin([{
    context: './public',
    from: '*.*'
    }])
    ]
    ./webpack.config.json

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  52. plugins: [
    new SWPrecacheWebpackPlugin({
    staticFileGlobs: [CACHED_FILES_GLOBS],
    logger: function () {},
    filename: 'sw.js'
    })
    ]
    ./webpack.config.json

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  53. <br/>if ('serviceWorker' in navigator) {<br/>window.addEventListener('load', function() {<br/>navigator.serviceWorker.register('sw.js');<br/>});<br/>}<br/>
    ./public/index.html

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  54. View Slide

  55. More views,
    React Routing

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  56. > yarn add react-router-dom
    > touch ./src/components/Home.js
    > tree ./src/components
    ├── App.js
    ├── AppShell.js
    └── Home.js

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  57. import {Card, CardTitle, CardText} from 'material-ui/Card';
    ./src/components/Home.js

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  58. class Home extends React.Component {
    render () {
    return (


    ...

    )
    }
    }
    ./src/components/Home.js

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  59. import {HashRouter as Router, Route} from 'react-router-dom';
    import Home from './Home';
    ./src/components/App.js

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  60. class App extends React.Component {
    render() {
    return (
    Hello World !!







    );
    }
    }
    ./src/components/App.js

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  61. View Slide

  62. > touch ./src/components/Users.js
    > touch ./src/components/Notification.js
    > tree ./src/components
    ├── App.js
    ├── AppShell.js
    ├── Home.js
    ├── Users.js
    └── Notification.js

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  63. import React from 'react';
    class Users extends React.Component {
    render() {
    return (
    Users
    );
    }
    }
    export default Users;
    ./src/components/Users.js

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  64. import React from 'react';
    class Notification extends React.Component {
    render() {
    return (
    Notification
    );
    }
    }
    export default Notification;
    ./src/components/Notification.js

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  65. import Users from './Users';
    import Notification from './Notification';
    ./src/components/App.js

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  66. ./src/components/App.js

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  67. import {Link} from 'react-router-dom';

    ...
    containerElement={}
    onClick={this.handleDrawerToggle}
    />
    containerElement={}
    onClick={this.handleDrawerToggle}
    />

    ./src/components/AppShell.js

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  69. Firebase
    Hosting with HTTPS

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  70. View Slide

  71. > npm install -g firebase-tools

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  72. View Slide

  73. > tree -L 1 ./ -a -I node_modules
    ├── .babelrc
    ├── .firebaserc
    ├── firebase.json
    ├── package.json
    ├── public
    ├── src
    ├── webpack.config.js
    └── yarn.lock

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  74. {
    "hosting": {
    "public": "build"
    }
    }
    ./firebase.json

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  75. {
    "projects": {
    "default": "YOUR-PROJECT-NAME"
    }
    }
    ./.firebaserc

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  76. View Slide

  77. > yarn build
    > tree -L 1 ./ -a -I node_modules
    ├── favicon.ico
    ├── icon-144x144.png
    ├── icon-192x192.png
    ├── icon-512x512.png
    ├── index.html
    ├── main.js
    ├── manifest.json
    ├── notification.js
    └── sw.js

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  78. Firebase
    Realtime Database

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  79. View Slide

  80. View Slide

  81. View Slide

  82. class Users extends React.Component {
    constructor() {
    super();
    this.state = {
    users: []
    };
    }
    }
    ./src/components/Users.js

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  83. componentDidMount() {
    const databaseURL = 'https: //YOUR_DATABASE_URL';
    fetch(`${databaseURL}/data.json/`).then(res => {
    if (res.status !== 200) {
    throw new Error(res.statusText);
    }
    return res.json();
    }).then(users => this.setState({users: users}))
    }
    ./src/components/Users.js

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  84. render() {
    const users = () => {
    return Object.keys(this.state.users).map(id => {
    const user = this.state.users[id];
    return (
    key={id}
    name={user.name}
    email={user.email} />
    );
    });
    }
    return ({users()} );
    }
    ./src/components/Users.js

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  85. View Slide

  86. View Slide

  87. plugins: [
    new SWPrecacheWebpackPlugin({
    ...
    runtimeCaching: [{
    urlPattersn: /https:\/\/.+.firebaseio.com/,
    handler: 'networkFirst'
    }]
    })
    ]
    ./webpack.config.js

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  88. View Slide

  89. Firebase
    Cloud Messaging

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  90. > yarn add firebase

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  91. View Slide

  92. {
    gcm_sender_id: "103953800507",
    ...
    };
    ./manifest.json

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  93. import firebase from 'firebase';
    ./src/components/Notification.js

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  94. var config = {
    apiKey: "AIzasdakagskgei@#9412i8123WWEeFwyuOk4af3vhYFw",
    authDomain: "YOURPROJECT.firebaseapp.com",
    databaseURL: "https: //YOURPROJECT.firebaseio.com",
    projectId: "YOURPROJECT",
    storageBucket: "YOURPROJECT.appspot.com",
    messagingSenderId: "2595534347235"
    };
    ./src/components/Notification.js

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  95. class Notification extends React.Component {
    static firebaseApp;
    constructor(props) {
    super(props);
    if (!Notification.firebaseApp) {
    firebase.initializeApp(config);
    }
    }
    }
    ./src/components/Notification.js

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  96. class Notification extends React.Component {
    constructor(props) {
    ...
    this.state = {
    token: '',
    message: ''
    };
    }
    }
    ./src/components/Notification.js

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  97. componentDidMount() {
    const messaging = firebase.messaging();
    messaging.onMessage(this.handlePushMessage);
    messaging.requestPermission()
    .then(() => messaging.getToken())
    .then(token => this.setState({token: token}))
    .catch(err => {
    throw new Error(err);
    });
    }
    ./src/components/Notification.js

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  98. handlePushMessage = noti => {
    this.setState({
    message: `${noti.title}: ${noti.body}`
    });
    }
    ./src/components/Notification.js

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  99. render() {
    return (






    );
    }
    ./src/components/Notification.js

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  100. > touch ./src/firebase-messaging-sw.js
    > tree -L 1 ./src -I node_modules
    ├── components
    ├── firebase-messaging-sw.js
    └── main.js

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  101. importScripts('https: // www.gstatic.com/firebasejs/3.5.2/firebase-app.js');
    importScripts('https: // www.gstatic.com/firebasejs/3.5.2/firebase-messaging.js');
    ./src/firebase-messaging-sw.js

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  102. var firebaseConfig = { ... };
    firebase.initializeApp(firebaseConfig);
    const messaging = firebase.messaging();
    messaging.setBackgroundMessageHandler(({data} = {}) => {
    const title = data.title || 'Title';
    const opts = Object.assign({body: data.body || 'Body'}, data);
    return self.registration.showNotification(title, opts);
    });
    ./src/firebase-messaging-sw.js

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  103. plugins: [
    new CopyWebpackPlugin([{
    ...
    }, {
    from: './src/firebase-messaging-sw.js',
    to: 'firebase-messaging-sw.js',
    }]),
    ]
    ./webpack.config.js

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  104. > npm install -g fcm-cli

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  105. View Slide

  106. View Slide

  107. View Slide

  108. > fcm send --server-key SERVER_KEY:bKFlxhMqS_PYGlCw4VTV \
    --to TOKEN:A91bFmi_DEQFPQ2FMf_7V8NcEGGqkAZEV- \
    --notification.title hi \
    --notification.body 'Hello World'

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  109. View Slide

  110. Tuning on
    PRPL Pattern

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  111. (P)ush critical resources for the initial route

    (R)ender initial route and get it interactive as soon as possible,

    (P)re-cache components for the remaining routes

    (L)azy-load, and create next routes on demand by user

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  112. View Slide

  113. View Slide

  114. Kicking
    Mega Bundle

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  115. View Slide

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  117. Breaking down
    Common Chunks

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  118. module.exports = {
    entry: {
    main: ['./src/main.js'],
    vendor: ['react', 'react-dom']
    },
    plugins: [
    new webpack.optimize.CommonsChunkPlugin({
    name: 'vendor'
    }),
    ]
    }
    ./webpack.config.js

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  119. ./public/index.html

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  122. Routes based
    Code-splitting

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  123. > yarn add --dev babel-plugin-syntax-
    dynamic-import

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  124. {
    "plugins": [
    "syntax-dynamic-import"
    ]
    }
    ./.babelrc

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  125. export default (getComponent) => (
    class AsyncComponent extends React.Component {
    componentWillMount() {
    if (!this.state.Component) {
    getComponent().then(Component => {
    AsyncComponent.Component = Component
    this.setState({ Component })
    });
    }
    }.
    ...
    }
    );
    ./src/components/AsyncComponent.js

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  126. import asyncComponent from './AsyncComponent';
    const Home = asyncComponent(() => {
    return import( /* webpackChunkName: "home" */ './Home')
    .then(module => module.default);
    });
    const Users = ...'
    const Notification = ...;
    ./src/components/App.js

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  127. View Slide

  128. View Slide

  129. Tree-shaking,
    Dead-code elimination
    Live-code Importing

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  130. View Slide

  131. import {Card, CardHeader} from 'material-ui';
    import {Card, CardHeader} from 'material-ui/Card';

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  132. > yarn add --dev babel-preset-es2015 babel-
    plugin-transform-imports

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  133. {
    "presets": [["es2015", {"modules": false}], "react-app"]
    }
    ./.babelrc

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  134. "plugins": [
    [
    "transform-imports", {
    "material-ui": {
    "transform": "material-ui/${member}",
    "preventFullImport": true
    },
    "react-router-dom": { ...},
    "lodash": { ...}
    }
    ]
    ]
    ./.babelrc

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  135. View Slide

  136. 494 kB

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  137. View Slide

  138. Extract common parts
    Shared Common Chunk

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  139. plugins: [
    new webpack.optimize.CommonsChunkPlugin({
    children: true,
    async: 'common',
    minChunks: 2
    }),
    ]
    ./webpack.config.js

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  140. ./public/index.html

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  142. View Slide

  143. View Slide

  144. View Slide

  145. Control resources pushing
    Preload, Prefetch

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  146. > yarn add --dev html-webpack-plugin
    preload-webpack-plugin

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  147. const HtmlWebpackPlugin = require('html-webpack-plugin');
    const PreloadWebpackPlugin = require('preload-webpack-plugin');
    ./webpack.config.js

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  148. plugins: [
    new HtmlWebpackPlugin({
    filename: 'index.html',
    template: './public/index.html',
    favicon: './public/favicon.ico'
    }),
    new PreloadWebpackPlugin({
    include: ['vendor', 'main', 'common', 'home']
    }),
    ]
    ./webpack.config.js

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  149. ./public/index.html

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  150. View Slide

  151. plugins: [
    new PreloadWebpackPlugin({
    rel: 'prefetch',
    include: ['users', 'notification']
    }),
    ]
    ./webpack.config.js

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  152. View Slide

  153. View Slide

  154. More
    Optimization

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  155. class LazySidebarDrawer extends React.Component {
    componentDidMount() {
    let frameCount = 0;
    const open = () => (frameCount ++ > 0) ? this.props.onMounted() :
    requestAnimationFrame(open);
    requestAnimationFrame(open);
    }
    render() {
    return (
    onRequestChange={this.props.onRequestChange}>
    ...

    );
    }
    }

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  156. render() {
    return (
    ...
    {}
    ...
    );
    }
    ./src/components/AppShell.js

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  157. View Slide

  158. > 144 kB

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  159. View Slide

  160. View Slide

  161. > yarn add react-lite

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  162. More plugins
    for Webpack

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  163. Auditing by
    Lighthouse

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  164. View Slide

  165. And more ...

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  166. View Slide