;
18 | }
19 | }
20 |
21 | export default CartItemList;
--------------------------------------------------------------------------------
/Lesson 3-Code/my-cart-04/src/App.css:
--------------------------------------------------------------------------------
1 | .App {
2 | text-align: center;
3 | }
4 |
5 | .App-logo {
6 | animation: App-logo-spin infinite 20s linear;
7 | height: 80px;
8 | }
9 |
10 | .App-header {
11 | background-color: #222;
12 | height: 70px;
13 | padding: 20px;
14 | color: white;
15 | }
16 |
17 | .App-title {
18 | font-size: 1.5em;
19 | }
20 |
21 | .App-intro {
22 | font-size: large;
23 | }
24 |
25 | @keyframes App-logo-spin {
26 | from { transform: rotate(0deg); }
27 | to { transform: rotate(360deg); }
28 | }
29 |
30 | nav li {
31 | display: inline-block;
32 | padding: 5px;
33 | }
34 |
35 | nav li a {
36 | color: white;
37 | }
38 |
--------------------------------------------------------------------------------
/Lesson 3-Code/my-shop-04/src/App.css:
--------------------------------------------------------------------------------
1 | .App {
2 | text-align: center;
3 | }
4 |
5 | .App-logo {
6 | animation: App-logo-spin infinite 20s linear;
7 | height: 80px;
8 | }
9 |
10 | .App-header {
11 | background-color: #222;
12 | height: 70px;
13 | padding: 20px;
14 | color: white;
15 | }
16 |
17 | .App-title {
18 | font-size: 1.5em;
19 | }
20 |
21 | .App-intro {
22 | font-size: large;
23 | }
24 |
25 | @keyframes App-logo-spin {
26 | from { transform: rotate(0deg); }
27 | to { transform: rotate(360deg); }
28 | }
29 |
30 | nav li {
31 | display: inline-block;
32 | padding: 5px;
33 | }
34 |
35 | nav li a {
36 | color: white;
37 | }
38 |
--------------------------------------------------------------------------------
/Lesson 3-Code/my-shop-05/src/App.css:
--------------------------------------------------------------------------------
1 | .App {
2 | text-align: center;
3 | }
4 |
5 | .App-logo {
6 | animation: App-logo-spin infinite 20s linear;
7 | height: 80px;
8 | }
9 |
10 | .App-header {
11 | background-color: #222;
12 | height: 70px;
13 | padding: 20px;
14 | color: white;
15 | }
16 |
17 | .App-title {
18 | font-size: 1.5em;
19 | }
20 |
21 | .App-intro {
22 | font-size: large;
23 | }
24 |
25 | @keyframes App-logo-spin {
26 | from { transform: rotate(0deg); }
27 | to { transform: rotate(360deg); }
28 | }
29 |
30 | nav li {
31 | display: inline-block;
32 | padding: 5px;
33 | }
34 |
35 | nav li a {
36 | color: white;
37 | }
38 |
--------------------------------------------------------------------------------
/Lesson 2-Code/my-shop-03/public/products.json:
--------------------------------------------------------------------------------
1 | [
2 | {"code":"P01", "name": "Traditional Merlot", "description": "A bottle of middle weight wine, lower in tannins (smoother), with a more red-fruited flavor profile."},
3 | {"code":"P02", "name": "Classic Chianti", "description": "A medium-bodied wine characterized by a marvelous freshness with a lingering, fruity finish"},
4 | {"code":"P03", "name": "Chardonnay", "description": "A dry full-bodied white wine with spicy, bourbon-y notes in an elegant bottle"},
5 | {"code":"P04", "name": "Brunello di Montalcino", "description": "A bottle of red wine with exceptionally bold fruit flavors, high tannin, and high acidity"}
6 | ]
--------------------------------------------------------------------------------
/Lesson 2-Code/my-shop-4/public/products.json:
--------------------------------------------------------------------------------
1 | [
2 | {"code":"P01", "name": "Traditional Merlot", "description": "A bottle of middle weight wine, lower in tannins (smoother), with a more red-fruited flavor profile."},
3 | {"code":"P02", "name": "Classic Chianti", "description": "A medium-bodied wine characterized by a marvelous freshness with a lingering, fruity finish"},
4 | {"code":"P03", "name": "Chardonnay", "description": "A dry full-bodied white wine with spicy, bourbon-y notes in an elegant bottle"},
5 | {"code":"P04", "name": "Brunello di Montalcino", "description": "A bottle of red wine with exceptionally bold fruit flavors, high tannin, and high acidity"}
6 | ]
--------------------------------------------------------------------------------
/Lesson 2-Code/my-shop-5/public/products.json:
--------------------------------------------------------------------------------
1 | [
2 | {"code":"P01", "name": "Traditional Merlot", "description": "A bottle of middle weight wine, lower in tannins (smoother), with a more red-fruited flavor profile."},
3 | {"code":"P02", "name": "Classic Chianti", "description": "A medium-bodied wine characterized by a marvelous freshness with a lingering, fruity finish"},
4 | {"code":"P03", "name": "Chardonnay", "description": "A dry full-bodied white wine with spicy, bourbon-y notes in an elegant bottle"},
5 | {"code":"P04", "name": "Brunello di Montalcino", "description": "A bottle of red wine with exceptionally bold fruit flavors, high tannin, and high acidity"}
6 | ]
--------------------------------------------------------------------------------
/Lesson 3-Code/my-shop-01/public/products.json:
--------------------------------------------------------------------------------
1 | [
2 | {"code":"P01", "name": "Traditional Merlot", "description": "A bottle of middle weight wine, lower in tannins (smoother), with a more red-fruited flavor profile.", "price": 4.5},
3 | {"code":"P02", "name": "Classic Chianti", "description": "A medium-bodied wine characterized by a marvelous freshness with a lingering, fruity finish", "price": 5.3},
4 | {"code":"P03", "name": "Chardonnay", "description": "A dry full-bodied white wine with spicy, bourbon-y notes in an elegant bottle", "price": 4.0},
5 | {"code":"P04", "name": "Brunello di Montalcino", "description": "A bottle of red wine with exceptionally bold fruit flavors, high tannin, and high acidity", "price": 7.5}
6 | ]
--------------------------------------------------------------------------------
/Lesson 3-Code/my-shop-05/src/WineMakers.js:
--------------------------------------------------------------------------------
1 | import React from 'react';
2 | import WineMaker from './WineMaker';
3 | import { Switch, Route, Link } from 'react-router-dom';
4 |
5 | class WineMakers extends React.Component {
6 | renderWineMakersList() {
7 | return
8 |
Wine & Wine
9 |
Wine & Co
10 |
;
11 | }
12 |
13 | render() {
14 | return
15 |
16 |
17 | ;
18 | }
19 | }
20 |
21 | export default WineMakers;
22 |
--------------------------------------------------------------------------------
/Lesson 3-Code/my-cart-01/public/products.json:
--------------------------------------------------------------------------------
1 | [
2 | {"code":"P01", "name": "Traditional Merlot", "description": "A bottle of middle weight wine, lower in tannins (smoother), with a more red-fruited flavor profile.", "price": 4.5, "selected": false},
3 | {"code":"P02", "name": "Classic Chianti", "description": "A medium-bodied wine characterized by a marvelous freshness with a lingering, fruity finish", "price": 5.3, "selected": false},
4 | {"code":"P03", "name": "Chardonnay", "description": "A dry full-bodied white wine with spicy, bourbon-y notes in an elegant bottle", "price": 4.0, "selected": false},
5 | {"code":"P04", "name": "Brunello di Montalcino", "description": "A bottle of red wine with exceptionally bold fruit flavors, high tannin, and high acidity", "price": 7.5, "selected": false}
6 | ]
--------------------------------------------------------------------------------
/Lesson 3-Code/my-cart-02/public/products.json:
--------------------------------------------------------------------------------
1 | [
2 | {"code":"P01", "name": "Traditional Merlot", "description": "A bottle of middle weight wine, lower in tannins (smoother), with a more red-fruited flavor profile.", "price": 4.5, "selected": false},
3 | {"code":"P02", "name": "Classic Chianti", "description": "A medium-bodied wine characterized by a marvelous freshness with a lingering, fruity finish", "price": 5.3, "selected": false},
4 | {"code":"P03", "name": "Chardonnay", "description": "A dry full-bodied white wine with spicy, bourbon-y notes in an elegant bottle", "price": 4.0, "selected": false},
5 | {"code":"P04", "name": "Brunello di Montalcino", "description": "A bottle of red wine with exceptionally bold fruit flavors, high tannin, and high acidity", "price": 7.5, "selected": false}
6 | ]
--------------------------------------------------------------------------------
/Lesson 3-Code/my-cart-03/public/products.json:
--------------------------------------------------------------------------------
1 | [
2 | {"code":"P01", "name": "Traditional Merlot", "description": "A bottle of middle weight wine, lower in tannins (smoother), with a more red-fruited flavor profile.", "price": 4.5, "selected": false},
3 | {"code":"P02", "name": "Classic Chianti", "description": "A medium-bodied wine characterized by a marvelous freshness with a lingering, fruity finish", "price": 5.3, "selected": false},
4 | {"code":"P03", "name": "Chardonnay", "description": "A dry full-bodied white wine with spicy, bourbon-y notes in an elegant bottle", "price": 4.0, "selected": false},
5 | {"code":"P04", "name": "Brunello di Montalcino", "description": "A bottle of red wine with exceptionally bold fruit flavors, high tannin, and high acidity", "price": 7.5, "selected": false}
6 | ]
--------------------------------------------------------------------------------
/Lesson 3-Code/my-cart-04/public/products.json:
--------------------------------------------------------------------------------
1 | [
2 | {"code":"P01", "name": "Traditional Merlot", "description": "A bottle of middle weight wine, lower in tannins (smoother), with a more red-fruited flavor profile.", "price": 4.5, "selected": false},
3 | {"code":"P02", "name": "Classic Chianti", "description": "A medium-bodied wine characterized by a marvelous freshness with a lingering, fruity finish", "price": 5.3, "selected": false},
4 | {"code":"P03", "name": "Chardonnay", "description": "A dry full-bodied white wine with spicy, bourbon-y notes in an elegant bottle", "price": 4.0, "selected": false},
5 | {"code":"P04", "name": "Brunello di Montalcino", "description": "A bottle of red wine with exceptionally bold fruit flavors, high tannin, and high acidity", "price": 7.5, "selected": false}
6 | ]
--------------------------------------------------------------------------------
/Lesson 3-Code/my-shop-02/public/products.json:
--------------------------------------------------------------------------------
1 | [
2 | {"code":"P01", "name": "Traditional Merlot", "description": "A bottle of middle weight wine, lower in tannins (smoother), with a more red-fruited flavor profile.", "price": 4.5, "selected": false},
3 | {"code":"P02", "name": "Classic Chianti", "description": "A medium-bodied wine characterized by a marvelous freshness with a lingering, fruity finish", "price": 5.3, "selected": false},
4 | {"code":"P03", "name": "Chardonnay", "description": "A dry full-bodied white wine with spicy, bourbon-y notes in an elegant bottle", "price": 4.0, "selected": false},
5 | {"code":"P04", "name": "Brunello di Montalcino", "description": "A bottle of red wine with exceptionally bold fruit flavors, high tannin, and high acidity", "price": 7.5, "selected": false}
6 | ]
--------------------------------------------------------------------------------
/Lesson 3-Code/my-shop-03/public/products.json:
--------------------------------------------------------------------------------
1 | [
2 | {"code":"P01", "name": "Traditional Merlot", "description": "A bottle of middle weight wine, lower in tannins (smoother), with a more red-fruited flavor profile.", "price": 4.5, "selected": false},
3 | {"code":"P02", "name": "Classic Chianti", "description": "A medium-bodied wine characterized by a marvelous freshness with a lingering, fruity finish", "price": 5.3, "selected": false},
4 | {"code":"P03", "name": "Chardonnay", "description": "A dry full-bodied white wine with spicy, bourbon-y notes in an elegant bottle", "price": 4.0, "selected": false},
5 | {"code":"P04", "name": "Brunello di Montalcino", "description": "A bottle of red wine with exceptionally bold fruit flavors, high tannin, and high acidity", "price": 7.5, "selected": false}
6 | ]
--------------------------------------------------------------------------------
/Lesson 3-Code/my-shop-04/public/products.json:
--------------------------------------------------------------------------------
1 | [
2 | {"code":"P01", "name": "Traditional Merlot", "description": "A bottle of middle weight wine, lower in tannins (smoother), with a more red-fruited flavor profile.", "price": 4.5, "selected": false},
3 | {"code":"P02", "name": "Classic Chianti", "description": "A medium-bodied wine characterized by a marvelous freshness with a lingering, fruity finish", "price": 5.3, "selected": false},
4 | {"code":"P03", "name": "Chardonnay", "description": "A dry full-bodied white wine with spicy, bourbon-y notes in an elegant bottle", "price": 4.0, "selected": false},
5 | {"code":"P04", "name": "Brunello di Montalcino", "description": "A bottle of red wine with exceptionally bold fruit flavors, high tannin, and high acidity", "price": 7.5, "selected": false}
6 | ]
--------------------------------------------------------------------------------
/Lesson 3-Code/my-shop-05/public/products.json:
--------------------------------------------------------------------------------
1 | [
2 | {"code":"P01", "name": "Traditional Merlot", "description": "A bottle of middle weight wine, lower in tannins (smoother), with a more red-fruited flavor profile.", "price": 4.5, "selected": false},
3 | {"code":"P02", "name": "Classic Chianti", "description": "A medium-bodied wine characterized by a marvelous freshness with a lingering, fruity finish", "price": 5.3, "selected": false},
4 | {"code":"P03", "name": "Chardonnay", "description": "A dry full-bodied white wine with spicy, bourbon-y notes in an elegant bottle", "price": 4.0, "selected": false},
5 | {"code":"P04", "name": "Brunello di Montalcino", "description": "A bottle of red wine with exceptionally bold fruit flavors, high tannin, and high acidity", "price": 7.5, "selected": false}
6 | ]
--------------------------------------------------------------------------------
/Lesson 3-Code/my-cart-01/src/Catalog.js:
--------------------------------------------------------------------------------
1 | import React from 'react';
2 | import './Catalog.css';
3 | import ProductList from './ProductList';
4 | import Cart from './Cart';
5 |
6 | class Catalog extends React.Component {
7 | constructor() {
8 | super();
9 | this.state = { products: [], cartItems: [] };
10 |
11 | fetch("products.json")
12 | .then(response => response.json())
13 | .then(json => {this.setState({products: json})})
14 | .catch(error => console.log(error));
15 | }
16 |
17 | render() {
18 | return
19 |
20 |
Wine Catalog
21 |
22 |
23 |
24 |
;
25 | }
26 | }
27 |
28 | export default Catalog;
29 |
--------------------------------------------------------------------------------
/Lesson 3-Code/my-shop-05/src/WineMaker.js:
--------------------------------------------------------------------------------
1 | import React from 'react';
2 |
3 | class WineMaker extends React.Component {
4 | constructor() {
5 | super();
6 | this.wineMakers = [
7 | {code: "WM1", name: "Wine & Wine", country: "Italy", description:"Wine & Wine produces an excellent Italian wine..."},
8 | {code: "WM2", name: "Wine & Co", country: "France", description:"Wine & Co is one of the most known producers of wine in France..."}
9 | ];
10 | }
11 |
12 |
13 | render() {
14 | let wineMaker = this.wineMakers.find(wm => wm.code === this.props.match.params.code);
15 | return
A bottle of middle weight wine, lower in tannins (smoother), with a more red-fruited flavor profile.
10 |
11 |
12 |
Classic Chianti
13 |
A medium-bodied wine characterized by a marvelous freshness with a lingering, fruity finish
14 |
15 |
16 |
Chardonnay
17 |
A dry full-bodied white wine with spicy, bourbon-y notes in an elegant bottle
18 |
19 |
20 |
Brunello di Montalcino
21 |
A bottle of red wine with exceptionally bold fruit flavors, high tannin, and high acidity
22 |
23 |
;
24 | }
25 | }
26 |
27 | export default ProductList;
28 |
--------------------------------------------------------------------------------
/Lesson 3-Code/my-shop-05/src/App.js:
--------------------------------------------------------------------------------
1 | import React, { Component } from 'react';
2 | import './App.css';
3 | import Catalog from './Catalog';
4 | import About from './About';
5 | import WineMakers from './WineMakers';
6 | import { Switch, Route, Link } from 'react-router-dom';
7 |
8 | class App extends Component {
9 | render() {
10 | return (
11 |
12 |
13 |
The Catalog App
14 |
21 |
22 |
23 |
24 |
25 |
26 |
27 |
28 | );
29 | }
30 | }
31 |
32 | export default App;
33 |
--------------------------------------------------------------------------------
/Lesson 2-Code/my-shop-4/src/ProductList.js:
--------------------------------------------------------------------------------
1 | import React from 'react';
2 | import './ProductList.css';
3 | import Product from './Product';
4 |
5 | class ProductList extends React.Component {
6 | render() {
7 | let products = [
8 | {code:"P01", name: "Traditional Merlot", description: "A bottle of middle weight wine, lower in tannins (smoother), with a more red-fruited flavor profile."},
9 | {code:"P02", name: "Classic Chianti", description: "A medium-bodied wine characterized by a marvelous freshness with a lingering, fruity finish"},
10 | {code:"P03", name: "Chardonnay", description: "A dry full-bodied white wine with spicy, bourbon-y notes in an elegant bottle"},
11 | {code:"P04", name: "Brunello di Montalcino", description: "A bottle of red wine with exceptionally bold fruit flavors, high tannin, and high acidity"}
12 | ];
13 | let productComponents = [];
14 |
15 | for (let product of products) {
16 | productComponents.push();
17 | }
18 |
19 | return
{productComponents}
;
20 | }
21 | }
22 |
23 | export default ProductList;
24 |
--------------------------------------------------------------------------------
/LICENSE:
--------------------------------------------------------------------------------
1 | MIT License
2 |
3 | Copyright (c) 2018 Training By Packt
4 |
5 | Permission is hereby granted, free of charge, to any person obtaining a copy
6 | of this software and associated documentation files (the "Software"), to deal
7 | in the Software without restriction, including without limitation the rights
8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
9 | copies of the Software, and to permit persons to whom the Software is
10 | furnished to do so, subject to the following conditions:
11 |
12 | The above copyright notice and this permission notice shall be included in all
13 | copies or substantial portions of the Software.
14 |
15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21 | SOFTWARE.
22 |
--------------------------------------------------------------------------------
/Lesson 2-Code/my-cart-01/public/index.html:
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/README.md:
--------------------------------------------------------------------------------
1 | [](https://github.com/TrainingByPackt/Beginning-Frontend-Development-with-React/issues)
2 | [](https://github.com/TrainingByPackt/Beginning-Frontend-Development-with-React/network)
3 | [](https://github.com/TrainingByPackt/Beginning-Frontend-Development-with-React/stargazers)
4 | [](https://github.com/TrainingByPackt/Beginning-Frontend-Development-with-React/pulls)
5 |
6 |
7 | # Beginning Application Development with TensorFlow and Keras
8 | This course will show you all the advantages of true native development that React Native has without the steep learning curve, leveraging the knowledge you already have. We do this by getting you up and running quickly with a sample application. Next, we’ll introduce you to the fundamentals of creating components and explain how React Native works under the hood. Once you have established a solid foundation, you will dive headfirst into developing a real-world application from start to finish. Along the way, we will demonstrate how to create multiple screens and navigate between them,use layout and style native UI components, and access native APIs such as local storage and geolocation. Finally, we tackle the advanced topic of Native modules, which demonstrates that there are truly no limits to what you can do with React Native.
9 |
10 |
11 | ## What you will learn
12 | * Set up the React Native environment on both devices and emulators
13 | * Gain an in-depth understanding of how React Native works behind the scenes
14 | * Write your own custom native UI components
15 | * Learn the ins and outs of screen navigation
16 | * Master the art of layout and styles
17 | * Work with device-exclusive data such as geolocation
18 | * Develop native modules in Objective-C and Java that interact with JavaScript
19 | * Test and deploy your application for a production-ready environment
20 |
21 |
22 | ### Hardware requirements
23 | For an optimal student experience, we recommend the following hardware configuration:
24 | * **Processor**: 2.6 GHz or higher, preferably multi-core
25 | * **Memory**: 4GB RAM
26 | * **Hard disk**: 10GB or more
27 | * A projector
28 | * An Internet connection
29 |
30 |
31 | ### Software requirements
32 | You’ll also need the following software installed in advance:
33 | * Operating System: Windows (8 or higher).
34 | * Google Chrome
35 | * Node.js latest version
36 |
37 |
38 |
39 |
40 |
--------------------------------------------------------------------------------
/Lesson 2-Code/my-shop-4/src/registerServiceWorker.js:
--------------------------------------------------------------------------------
1 | // In production, we register a service worker to serve assets from local cache.
2 |
3 | // This lets the app load faster on subsequent visits in production, and gives
4 | // it offline capabilities. However, it also means that developers (and users)
5 | // will only see deployed updates on the "N+1" visit to a page, since previously
6 | // cached resources are updated in the background.
7 |
8 | // To learn more about the benefits of this model, read https://goo.gl/KwvDNy.
9 | // This link also includes instructions on opting out of this behavior.
10 |
11 | const isLocalhost = Boolean(
12 | window.location.hostname === 'localhost' ||
13 | // [::1] is the IPv6 localhost address.
14 | window.location.hostname === '[::1]' ||
15 | // 127.0.0.1/8 is considered localhost for IPv4.
16 | window.location.hostname.match(
17 | /^127(?:\.(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)){3}$/
18 | )
19 | );
20 |
21 | export default function register() {
22 | if (process.env.NODE_ENV === 'production' && 'serviceWorker' in navigator) {
23 | // The URL constructor is available in all browsers that support SW.
24 | const publicUrl = new URL(process.env.PUBLIC_URL, window.location);
25 | if (publicUrl.origin !== window.location.origin) {
26 | // Our service worker won't work if PUBLIC_URL is on a different origin
27 | // from what our page is served on. This might happen if a CDN is used to
28 | // serve assets; see https://github.com/facebookincubator/create-react-app/issues/2374
29 | return;
30 | }
31 |
32 | window.addEventListener('load', () => {
33 | const swUrl = `${process.env.PUBLIC_URL}/service-worker.js`;
34 |
35 | if (isLocalhost) {
36 | // This is running on localhost. Lets check if a service worker still exists or not.
37 | checkValidServiceWorker(swUrl);
38 | } else {
39 | // Is not local host. Just register service worker
40 | registerValidSW(swUrl);
41 | }
42 | });
43 | }
44 | }
45 |
46 | function registerValidSW(swUrl) {
47 | navigator.serviceWorker
48 | .register(swUrl)
49 | .then(registration => {
50 | registration.onupdatefound = () => {
51 | const installingWorker = registration.installing;
52 | installingWorker.onstatechange = () => {
53 | if (installingWorker.state === 'installed') {
54 | if (navigator.serviceWorker.controller) {
55 | // At this point, the old content will have been purged and
56 | // the fresh content will have been added to the cache.
57 | // It's the perfect time to display a "New content is
58 | // available; please refresh." message in your web app.
59 | console.log('New content is available; please refresh.');
60 | } else {
61 | // At this point, everything has been precached.
62 | // It's the perfect time to display a
63 | // "Content is cached for offline use." message.
64 | console.log('Content is cached for offline use.');
65 | }
66 | }
67 | };
68 | };
69 | })
70 | .catch(error => {
71 | console.error('Error during service worker registration:', error);
72 | });
73 | }
74 |
75 | function checkValidServiceWorker(swUrl) {
76 | // Check if the service worker can be found. If it can't reload the page.
77 | fetch(swUrl)
78 | .then(response => {
79 | // Ensure service worker exists, and that we really are getting a JS file.
80 | if (
81 | response.status === 404 ||
82 | response.headers.get('content-type').indexOf('javascript') === -1
83 | ) {
84 | // No service worker found. Probably a different app. Reload the page.
85 | navigator.serviceWorker.ready.then(registration => {
86 | registration.unregister().then(() => {
87 | window.location.reload();
88 | });
89 | });
90 | } else {
91 | // Service worker found. Proceed as normal.
92 | registerValidSW(swUrl);
93 | }
94 | })
95 | .catch(() => {
96 | console.log(
97 | 'No internet connection found. App is running in offline mode.'
98 | );
99 | });
100 | }
101 |
102 | export function unregister() {
103 | if ('serviceWorker' in navigator) {
104 | navigator.serviceWorker.ready.then(registration => {
105 | registration.unregister();
106 | });
107 | }
108 | }
109 |
--------------------------------------------------------------------------------
/Lesson 2-Code/my-shop-5/src/registerServiceWorker.js:
--------------------------------------------------------------------------------
1 | // In production, we register a service worker to serve assets from local cache.
2 |
3 | // This lets the app load faster on subsequent visits in production, and gives
4 | // it offline capabilities. However, it also means that developers (and users)
5 | // will only see deployed updates on the "N+1" visit to a page, since previously
6 | // cached resources are updated in the background.
7 |
8 | // To learn more about the benefits of this model, read https://goo.gl/KwvDNy.
9 | // This link also includes instructions on opting out of this behavior.
10 |
11 | const isLocalhost = Boolean(
12 | window.location.hostname === 'localhost' ||
13 | // [::1] is the IPv6 localhost address.
14 | window.location.hostname === '[::1]' ||
15 | // 127.0.0.1/8 is considered localhost for IPv4.
16 | window.location.hostname.match(
17 | /^127(?:\.(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)){3}$/
18 | )
19 | );
20 |
21 | export default function register() {
22 | if (process.env.NODE_ENV === 'production' && 'serviceWorker' in navigator) {
23 | // The URL constructor is available in all browsers that support SW.
24 | const publicUrl = new URL(process.env.PUBLIC_URL, window.location);
25 | if (publicUrl.origin !== window.location.origin) {
26 | // Our service worker won't work if PUBLIC_URL is on a different origin
27 | // from what our page is served on. This might happen if a CDN is used to
28 | // serve assets; see https://github.com/facebookincubator/create-react-app/issues/2374
29 | return;
30 | }
31 |
32 | window.addEventListener('load', () => {
33 | const swUrl = `${process.env.PUBLIC_URL}/service-worker.js`;
34 |
35 | if (isLocalhost) {
36 | // This is running on localhost. Lets check if a service worker still exists or not.
37 | checkValidServiceWorker(swUrl);
38 | } else {
39 | // Is not local host. Just register service worker
40 | registerValidSW(swUrl);
41 | }
42 | });
43 | }
44 | }
45 |
46 | function registerValidSW(swUrl) {
47 | navigator.serviceWorker
48 | .register(swUrl)
49 | .then(registration => {
50 | registration.onupdatefound = () => {
51 | const installingWorker = registration.installing;
52 | installingWorker.onstatechange = () => {
53 | if (installingWorker.state === 'installed') {
54 | if (navigator.serviceWorker.controller) {
55 | // At this point, the old content will have been purged and
56 | // the fresh content will have been added to the cache.
57 | // It's the perfect time to display a "New content is
58 | // available; please refresh." message in your web app.
59 | console.log('New content is available; please refresh.');
60 | } else {
61 | // At this point, everything has been precached.
62 | // It's the perfect time to display a
63 | // "Content is cached for offline use." message.
64 | console.log('Content is cached for offline use.');
65 | }
66 | }
67 | };
68 | };
69 | })
70 | .catch(error => {
71 | console.error('Error during service worker registration:', error);
72 | });
73 | }
74 |
75 | function checkValidServiceWorker(swUrl) {
76 | // Check if the service worker can be found. If it can't reload the page.
77 | fetch(swUrl)
78 | .then(response => {
79 | // Ensure service worker exists, and that we really are getting a JS file.
80 | if (
81 | response.status === 404 ||
82 | response.headers.get('content-type').indexOf('javascript') === -1
83 | ) {
84 | // No service worker found. Probably a different app. Reload the page.
85 | navigator.serviceWorker.ready.then(registration => {
86 | registration.unregister().then(() => {
87 | window.location.reload();
88 | });
89 | });
90 | } else {
91 | // Service worker found. Proceed as normal.
92 | registerValidSW(swUrl);
93 | }
94 | })
95 | .catch(() => {
96 | console.log(
97 | 'No internet connection found. App is running in offline mode.'
98 | );
99 | });
100 | }
101 |
102 | export function unregister() {
103 | if ('serviceWorker' in navigator) {
104 | navigator.serviceWorker.ready.then(registration => {
105 | registration.unregister();
106 | });
107 | }
108 | }
109 |
--------------------------------------------------------------------------------
/Lesson 2-Code/my-cart-01/src/registerServiceWorker.js:
--------------------------------------------------------------------------------
1 | // In production, we register a service worker to serve assets from local cache.
2 |
3 | // This lets the app load faster on subsequent visits in production, and gives
4 | // it offline capabilities. However, it also means that developers (and users)
5 | // will only see deployed updates on the "N+1" visit to a page, since previously
6 | // cached resources are updated in the background.
7 |
8 | // To learn more about the benefits of this model, read https://goo.gl/KwvDNy.
9 | // This link also includes instructions on opting out of this behavior.
10 |
11 | const isLocalhost = Boolean(
12 | window.location.hostname === 'localhost' ||
13 | // [::1] is the IPv6 localhost address.
14 | window.location.hostname === '[::1]' ||
15 | // 127.0.0.1/8 is considered localhost for IPv4.
16 | window.location.hostname.match(
17 | /^127(?:\.(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)){3}$/
18 | )
19 | );
20 |
21 | export default function register() {
22 | if (process.env.NODE_ENV === 'production' && 'serviceWorker' in navigator) {
23 | // The URL constructor is available in all browsers that support SW.
24 | const publicUrl = new URL(process.env.PUBLIC_URL, window.location);
25 | if (publicUrl.origin !== window.location.origin) {
26 | // Our service worker won't work if PUBLIC_URL is on a different origin
27 | // from what our page is served on. This might happen if a CDN is used to
28 | // serve assets; see https://github.com/facebookincubator/create-react-app/issues/2374
29 | return;
30 | }
31 |
32 | window.addEventListener('load', () => {
33 | const swUrl = `${process.env.PUBLIC_URL}/service-worker.js`;
34 |
35 | if (isLocalhost) {
36 | // This is running on localhost. Lets check if a service worker still exists or not.
37 | checkValidServiceWorker(swUrl);
38 | } else {
39 | // Is not local host. Just register service worker
40 | registerValidSW(swUrl);
41 | }
42 | });
43 | }
44 | }
45 |
46 | function registerValidSW(swUrl) {
47 | navigator.serviceWorker
48 | .register(swUrl)
49 | .then(registration => {
50 | registration.onupdatefound = () => {
51 | const installingWorker = registration.installing;
52 | installingWorker.onstatechange = () => {
53 | if (installingWorker.state === 'installed') {
54 | if (navigator.serviceWorker.controller) {
55 | // At this point, the old content will have been purged and
56 | // the fresh content will have been added to the cache.
57 | // It's the perfect time to display a "New content is
58 | // available; please refresh." message in your web app.
59 | console.log('New content is available; please refresh.');
60 | } else {
61 | // At this point, everything has been precached.
62 | // It's the perfect time to display a
63 | // "Content is cached for offline use." message.
64 | console.log('Content is cached for offline use.');
65 | }
66 | }
67 | };
68 | };
69 | })
70 | .catch(error => {
71 | console.error('Error during service worker registration:', error);
72 | });
73 | }
74 |
75 | function checkValidServiceWorker(swUrl) {
76 | // Check if the service worker can be found. If it can't reload the page.
77 | fetch(swUrl)
78 | .then(response => {
79 | // Ensure service worker exists, and that we really are getting a JS file.
80 | if (
81 | response.status === 404 ||
82 | response.headers.get('content-type').indexOf('javascript') === -1
83 | ) {
84 | // No service worker found. Probably a different app. Reload the page.
85 | navigator.serviceWorker.ready.then(registration => {
86 | registration.unregister().then(() => {
87 | window.location.reload();
88 | });
89 | });
90 | } else {
91 | // Service worker found. Proceed as normal.
92 | registerValidSW(swUrl);
93 | }
94 | })
95 | .catch(() => {
96 | console.log(
97 | 'No internet connection found. App is running in offline mode.'
98 | );
99 | });
100 | }
101 |
102 | export function unregister() {
103 | if ('serviceWorker' in navigator) {
104 | navigator.serviceWorker.ready.then(registration => {
105 | registration.unregister();
106 | });
107 | }
108 | }
109 |
--------------------------------------------------------------------------------
/Lesson 2-Code/my-cart-02/src/registerServiceWorker.js:
--------------------------------------------------------------------------------
1 | // In production, we register a service worker to serve assets from local cache.
2 |
3 | // This lets the app load faster on subsequent visits in production, and gives
4 | // it offline capabilities. However, it also means that developers (and users)
5 | // will only see deployed updates on the "N+1" visit to a page, since previously
6 | // cached resources are updated in the background.
7 |
8 | // To learn more about the benefits of this model, read https://goo.gl/KwvDNy.
9 | // This link also includes instructions on opting out of this behavior.
10 |
11 | const isLocalhost = Boolean(
12 | window.location.hostname === 'localhost' ||
13 | // [::1] is the IPv6 localhost address.
14 | window.location.hostname === '[::1]' ||
15 | // 127.0.0.1/8 is considered localhost for IPv4.
16 | window.location.hostname.match(
17 | /^127(?:\.(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)){3}$/
18 | )
19 | );
20 |
21 | export default function register() {
22 | if (process.env.NODE_ENV === 'production' && 'serviceWorker' in navigator) {
23 | // The URL constructor is available in all browsers that support SW.
24 | const publicUrl = new URL(process.env.PUBLIC_URL, window.location);
25 | if (publicUrl.origin !== window.location.origin) {
26 | // Our service worker won't work if PUBLIC_URL is on a different origin
27 | // from what our page is served on. This might happen if a CDN is used to
28 | // serve assets; see https://github.com/facebookincubator/create-react-app/issues/2374
29 | return;
30 | }
31 |
32 | window.addEventListener('load', () => {
33 | const swUrl = `${process.env.PUBLIC_URL}/service-worker.js`;
34 |
35 | if (isLocalhost) {
36 | // This is running on localhost. Lets check if a service worker still exists or not.
37 | checkValidServiceWorker(swUrl);
38 | } else {
39 | // Is not local host. Just register service worker
40 | registerValidSW(swUrl);
41 | }
42 | });
43 | }
44 | }
45 |
46 | function registerValidSW(swUrl) {
47 | navigator.serviceWorker
48 | .register(swUrl)
49 | .then(registration => {
50 | registration.onupdatefound = () => {
51 | const installingWorker = registration.installing;
52 | installingWorker.onstatechange = () => {
53 | if (installingWorker.state === 'installed') {
54 | if (navigator.serviceWorker.controller) {
55 | // At this point, the old content will have been purged and
56 | // the fresh content will have been added to the cache.
57 | // It's the perfect time to display a "New content is
58 | // available; please refresh." message in your web app.
59 | console.log('New content is available; please refresh.');
60 | } else {
61 | // At this point, everything has been precached.
62 | // It's the perfect time to display a
63 | // "Content is cached for offline use." message.
64 | console.log('Content is cached for offline use.');
65 | }
66 | }
67 | };
68 | };
69 | })
70 | .catch(error => {
71 | console.error('Error during service worker registration:', error);
72 | });
73 | }
74 |
75 | function checkValidServiceWorker(swUrl) {
76 | // Check if the service worker can be found. If it can't reload the page.
77 | fetch(swUrl)
78 | .then(response => {
79 | // Ensure service worker exists, and that we really are getting a JS file.
80 | if (
81 | response.status === 404 ||
82 | response.headers.get('content-type').indexOf('javascript') === -1
83 | ) {
84 | // No service worker found. Probably a different app. Reload the page.
85 | navigator.serviceWorker.ready.then(registration => {
86 | registration.unregister().then(() => {
87 | window.location.reload();
88 | });
89 | });
90 | } else {
91 | // Service worker found. Proceed as normal.
92 | registerValidSW(swUrl);
93 | }
94 | })
95 | .catch(() => {
96 | console.log(
97 | 'No internet connection found. App is running in offline mode.'
98 | );
99 | });
100 | }
101 |
102 | export function unregister() {
103 | if ('serviceWorker' in navigator) {
104 | navigator.serviceWorker.ready.then(registration => {
105 | registration.unregister();
106 | });
107 | }
108 | }
109 |
--------------------------------------------------------------------------------
/Lesson 2-Code/my-cart-03/src/registerServiceWorker.js:
--------------------------------------------------------------------------------
1 | // In production, we register a service worker to serve assets from local cache.
2 |
3 | // This lets the app load faster on subsequent visits in production, and gives
4 | // it offline capabilities. However, it also means that developers (and users)
5 | // will only see deployed updates on the "N+1" visit to a page, since previously
6 | // cached resources are updated in the background.
7 |
8 | // To learn more about the benefits of this model, read https://goo.gl/KwvDNy.
9 | // This link also includes instructions on opting out of this behavior.
10 |
11 | const isLocalhost = Boolean(
12 | window.location.hostname === 'localhost' ||
13 | // [::1] is the IPv6 localhost address.
14 | window.location.hostname === '[::1]' ||
15 | // 127.0.0.1/8 is considered localhost for IPv4.
16 | window.location.hostname.match(
17 | /^127(?:\.(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)){3}$/
18 | )
19 | );
20 |
21 | export default function register() {
22 | if (process.env.NODE_ENV === 'production' && 'serviceWorker' in navigator) {
23 | // The URL constructor is available in all browsers that support SW.
24 | const publicUrl = new URL(process.env.PUBLIC_URL, window.location);
25 | if (publicUrl.origin !== window.location.origin) {
26 | // Our service worker won't work if PUBLIC_URL is on a different origin
27 | // from what our page is served on. This might happen if a CDN is used to
28 | // serve assets; see https://github.com/facebookincubator/create-react-app/issues/2374
29 | return;
30 | }
31 |
32 | window.addEventListener('load', () => {
33 | const swUrl = `${process.env.PUBLIC_URL}/service-worker.js`;
34 |
35 | if (isLocalhost) {
36 | // This is running on localhost. Lets check if a service worker still exists or not.
37 | checkValidServiceWorker(swUrl);
38 | } else {
39 | // Is not local host. Just register service worker
40 | registerValidSW(swUrl);
41 | }
42 | });
43 | }
44 | }
45 |
46 | function registerValidSW(swUrl) {
47 | navigator.serviceWorker
48 | .register(swUrl)
49 | .then(registration => {
50 | registration.onupdatefound = () => {
51 | const installingWorker = registration.installing;
52 | installingWorker.onstatechange = () => {
53 | if (installingWorker.state === 'installed') {
54 | if (navigator.serviceWorker.controller) {
55 | // At this point, the old content will have been purged and
56 | // the fresh content will have been added to the cache.
57 | // It's the perfect time to display a "New content is
58 | // available; please refresh." message in your web app.
59 | console.log('New content is available; please refresh.');
60 | } else {
61 | // At this point, everything has been precached.
62 | // It's the perfect time to display a
63 | // "Content is cached for offline use." message.
64 | console.log('Content is cached for offline use.');
65 | }
66 | }
67 | };
68 | };
69 | })
70 | .catch(error => {
71 | console.error('Error during service worker registration:', error);
72 | });
73 | }
74 |
75 | function checkValidServiceWorker(swUrl) {
76 | // Check if the service worker can be found. If it can't reload the page.
77 | fetch(swUrl)
78 | .then(response => {
79 | // Ensure service worker exists, and that we really are getting a JS file.
80 | if (
81 | response.status === 404 ||
82 | response.headers.get('content-type').indexOf('javascript') === -1
83 | ) {
84 | // No service worker found. Probably a different app. Reload the page.
85 | navigator.serviceWorker.ready.then(registration => {
86 | registration.unregister().then(() => {
87 | window.location.reload();
88 | });
89 | });
90 | } else {
91 | // Service worker found. Proceed as normal.
92 | registerValidSW(swUrl);
93 | }
94 | })
95 | .catch(() => {
96 | console.log(
97 | 'No internet connection found. App is running in offline mode.'
98 | );
99 | });
100 | }
101 |
102 | export function unregister() {
103 | if ('serviceWorker' in navigator) {
104 | navigator.serviceWorker.ready.then(registration => {
105 | registration.unregister();
106 | });
107 | }
108 | }
109 |
--------------------------------------------------------------------------------
/Lesson 2-Code/my-cart-04/src/registerServiceWorker.js:
--------------------------------------------------------------------------------
1 | // In production, we register a service worker to serve assets from local cache.
2 |
3 | // This lets the app load faster on subsequent visits in production, and gives
4 | // it offline capabilities. However, it also means that developers (and users)
5 | // will only see deployed updates on the "N+1" visit to a page, since previously
6 | // cached resources are updated in the background.
7 |
8 | // To learn more about the benefits of this model, read https://goo.gl/KwvDNy.
9 | // This link also includes instructions on opting out of this behavior.
10 |
11 | const isLocalhost = Boolean(
12 | window.location.hostname === 'localhost' ||
13 | // [::1] is the IPv6 localhost address.
14 | window.location.hostname === '[::1]' ||
15 | // 127.0.0.1/8 is considered localhost for IPv4.
16 | window.location.hostname.match(
17 | /^127(?:\.(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)){3}$/
18 | )
19 | );
20 |
21 | export default function register() {
22 | if (process.env.NODE_ENV === 'production' && 'serviceWorker' in navigator) {
23 | // The URL constructor is available in all browsers that support SW.
24 | const publicUrl = new URL(process.env.PUBLIC_URL, window.location);
25 | if (publicUrl.origin !== window.location.origin) {
26 | // Our service worker won't work if PUBLIC_URL is on a different origin
27 | // from what our page is served on. This might happen if a CDN is used to
28 | // serve assets; see https://github.com/facebookincubator/create-react-app/issues/2374
29 | return;
30 | }
31 |
32 | window.addEventListener('load', () => {
33 | const swUrl = `${process.env.PUBLIC_URL}/service-worker.js`;
34 |
35 | if (isLocalhost) {
36 | // This is running on localhost. Lets check if a service worker still exists or not.
37 | checkValidServiceWorker(swUrl);
38 | } else {
39 | // Is not local host. Just register service worker
40 | registerValidSW(swUrl);
41 | }
42 | });
43 | }
44 | }
45 |
46 | function registerValidSW(swUrl) {
47 | navigator.serviceWorker
48 | .register(swUrl)
49 | .then(registration => {
50 | registration.onupdatefound = () => {
51 | const installingWorker = registration.installing;
52 | installingWorker.onstatechange = () => {
53 | if (installingWorker.state === 'installed') {
54 | if (navigator.serviceWorker.controller) {
55 | // At this point, the old content will have been purged and
56 | // the fresh content will have been added to the cache.
57 | // It's the perfect time to display a "New content is
58 | // available; please refresh." message in your web app.
59 | console.log('New content is available; please refresh.');
60 | } else {
61 | // At this point, everything has been precached.
62 | // It's the perfect time to display a
63 | // "Content is cached for offline use." message.
64 | console.log('Content is cached for offline use.');
65 | }
66 | }
67 | };
68 | };
69 | })
70 | .catch(error => {
71 | console.error('Error during service worker registration:', error);
72 | });
73 | }
74 |
75 | function checkValidServiceWorker(swUrl) {
76 | // Check if the service worker can be found. If it can't reload the page.
77 | fetch(swUrl)
78 | .then(response => {
79 | // Ensure service worker exists, and that we really are getting a JS file.
80 | if (
81 | response.status === 404 ||
82 | response.headers.get('content-type').indexOf('javascript') === -1
83 | ) {
84 | // No service worker found. Probably a different app. Reload the page.
85 | navigator.serviceWorker.ready.then(registration => {
86 | registration.unregister().then(() => {
87 | window.location.reload();
88 | });
89 | });
90 | } else {
91 | // Service worker found. Proceed as normal.
92 | registerValidSW(swUrl);
93 | }
94 | })
95 | .catch(() => {
96 | console.log(
97 | 'No internet connection found. App is running in offline mode.'
98 | );
99 | });
100 | }
101 |
102 | export function unregister() {
103 | if ('serviceWorker' in navigator) {
104 | navigator.serviceWorker.ready.then(registration => {
105 | registration.unregister();
106 | });
107 | }
108 | }
109 |
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/Lesson 2-Code/my-shop-01/src/registerServiceWorker.js:
--------------------------------------------------------------------------------
1 | // In production, we register a service worker to serve assets from local cache.
2 |
3 | // This lets the app load faster on subsequent visits in production, and gives
4 | // it offline capabilities. However, it also means that developers (and users)
5 | // will only see deployed updates on the "N+1" visit to a page, since previously
6 | // cached resources are updated in the background.
7 |
8 | // To learn more about the benefits of this model, read https://goo.gl/KwvDNy.
9 | // This link also includes instructions on opting out of this behavior.
10 |
11 | const isLocalhost = Boolean(
12 | window.location.hostname === 'localhost' ||
13 | // [::1] is the IPv6 localhost address.
14 | window.location.hostname === '[::1]' ||
15 | // 127.0.0.1/8 is considered localhost for IPv4.
16 | window.location.hostname.match(
17 | /^127(?:\.(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)){3}$/
18 | )
19 | );
20 |
21 | export default function register() {
22 | if (process.env.NODE_ENV === 'production' && 'serviceWorker' in navigator) {
23 | // The URL constructor is available in all browsers that support SW.
24 | const publicUrl = new URL(process.env.PUBLIC_URL, window.location);
25 | if (publicUrl.origin !== window.location.origin) {
26 | // Our service worker won't work if PUBLIC_URL is on a different origin
27 | // from what our page is served on. This might happen if a CDN is used to
28 | // serve assets; see https://github.com/facebookincubator/create-react-app/issues/2374
29 | return;
30 | }
31 |
32 | window.addEventListener('load', () => {
33 | const swUrl = `${process.env.PUBLIC_URL}/service-worker.js`;
34 |
35 | if (isLocalhost) {
36 | // This is running on localhost. Lets check if a service worker still exists or not.
37 | checkValidServiceWorker(swUrl);
38 | } else {
39 | // Is not local host. Just register service worker
40 | registerValidSW(swUrl);
41 | }
42 | });
43 | }
44 | }
45 |
46 | function registerValidSW(swUrl) {
47 | navigator.serviceWorker
48 | .register(swUrl)
49 | .then(registration => {
50 | registration.onupdatefound = () => {
51 | const installingWorker = registration.installing;
52 | installingWorker.onstatechange = () => {
53 | if (installingWorker.state === 'installed') {
54 | if (navigator.serviceWorker.controller) {
55 | // At this point, the old content will have been purged and
56 | // the fresh content will have been added to the cache.
57 | // It's the perfect time to display a "New content is
58 | // available; please refresh." message in your web app.
59 | console.log('New content is available; please refresh.');
60 | } else {
61 | // At this point, everything has been precached.
62 | // It's the perfect time to display a
63 | // "Content is cached for offline use." message.
64 | console.log('Content is cached for offline use.');
65 | }
66 | }
67 | };
68 | };
69 | })
70 | .catch(error => {
71 | console.error('Error during service worker registration:', error);
72 | });
73 | }
74 |
75 | function checkValidServiceWorker(swUrl) {
76 | // Check if the service worker can be found. If it can't reload the page.
77 | fetch(swUrl)
78 | .then(response => {
79 | // Ensure service worker exists, and that we really are getting a JS file.
80 | if (
81 | response.status === 404 ||
82 | response.headers.get('content-type').indexOf('javascript') === -1
83 | ) {
84 | // No service worker found. Probably a different app. Reload the page.
85 | navigator.serviceWorker.ready.then(registration => {
86 | registration.unregister().then(() => {
87 | window.location.reload();
88 | });
89 | });
90 | } else {
91 | // Service worker found. Proceed as normal.
92 | registerValidSW(swUrl);
93 | }
94 | })
95 | .catch(() => {
96 | console.log(
97 | 'No internet connection found. App is running in offline mode.'
98 | );
99 | });
100 | }
101 |
102 | export function unregister() {
103 | if ('serviceWorker' in navigator) {
104 | navigator.serviceWorker.ready.then(registration => {
105 | registration.unregister();
106 | });
107 | }
108 | }
109 |
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/Lesson 2-Code/my-shop-02/src/registerServiceWorker.js:
--------------------------------------------------------------------------------
1 | // In production, we register a service worker to serve assets from local cache.
2 |
3 | // This lets the app load faster on subsequent visits in production, and gives
4 | // it offline capabilities. However, it also means that developers (and users)
5 | // will only see deployed updates on the "N+1" visit to a page, since previously
6 | // cached resources are updated in the background.
7 |
8 | // To learn more about the benefits of this model, read https://goo.gl/KwvDNy.
9 | // This link also includes instructions on opting out of this behavior.
10 |
11 | const isLocalhost = Boolean(
12 | window.location.hostname === 'localhost' ||
13 | // [::1] is the IPv6 localhost address.
14 | window.location.hostname === '[::1]' ||
15 | // 127.0.0.1/8 is considered localhost for IPv4.
16 | window.location.hostname.match(
17 | /^127(?:\.(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)){3}$/
18 | )
19 | );
20 |
21 | export default function register() {
22 | if (process.env.NODE_ENV === 'production' && 'serviceWorker' in navigator) {
23 | // The URL constructor is available in all browsers that support SW.
24 | const publicUrl = new URL(process.env.PUBLIC_URL, window.location);
25 | if (publicUrl.origin !== window.location.origin) {
26 | // Our service worker won't work if PUBLIC_URL is on a different origin
27 | // from what our page is served on. This might happen if a CDN is used to
28 | // serve assets; see https://github.com/facebookincubator/create-react-app/issues/2374
29 | return;
30 | }
31 |
32 | window.addEventListener('load', () => {
33 | const swUrl = `${process.env.PUBLIC_URL}/service-worker.js`;
34 |
35 | if (isLocalhost) {
36 | // This is running on localhost. Lets check if a service worker still exists or not.
37 | checkValidServiceWorker(swUrl);
38 | } else {
39 | // Is not local host. Just register service worker
40 | registerValidSW(swUrl);
41 | }
42 | });
43 | }
44 | }
45 |
46 | function registerValidSW(swUrl) {
47 | navigator.serviceWorker
48 | .register(swUrl)
49 | .then(registration => {
50 | registration.onupdatefound = () => {
51 | const installingWorker = registration.installing;
52 | installingWorker.onstatechange = () => {
53 | if (installingWorker.state === 'installed') {
54 | if (navigator.serviceWorker.controller) {
55 | // At this point, the old content will have been purged and
56 | // the fresh content will have been added to the cache.
57 | // It's the perfect time to display a "New content is
58 | // available; please refresh." message in your web app.
59 | console.log('New content is available; please refresh.');
60 | } else {
61 | // At this point, everything has been precached.
62 | // It's the perfect time to display a
63 | // "Content is cached for offline use." message.
64 | console.log('Content is cached for offline use.');
65 | }
66 | }
67 | };
68 | };
69 | })
70 | .catch(error => {
71 | console.error('Error during service worker registration:', error);
72 | });
73 | }
74 |
75 | function checkValidServiceWorker(swUrl) {
76 | // Check if the service worker can be found. If it can't reload the page.
77 | fetch(swUrl)
78 | .then(response => {
79 | // Ensure service worker exists, and that we really are getting a JS file.
80 | if (
81 | response.status === 404 ||
82 | response.headers.get('content-type').indexOf('javascript') === -1
83 | ) {
84 | // No service worker found. Probably a different app. Reload the page.
85 | navigator.serviceWorker.ready.then(registration => {
86 | registration.unregister().then(() => {
87 | window.location.reload();
88 | });
89 | });
90 | } else {
91 | // Service worker found. Proceed as normal.
92 | registerValidSW(swUrl);
93 | }
94 | })
95 | .catch(() => {
96 | console.log(
97 | 'No internet connection found. App is running in offline mode.'
98 | );
99 | });
100 | }
101 |
102 | export function unregister() {
103 | if ('serviceWorker' in navigator) {
104 | navigator.serviceWorker.ready.then(registration => {
105 | registration.unregister();
106 | });
107 | }
108 | }
109 |
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/Lesson 2-Code/my-shop-03/src/registerServiceWorker.js:
--------------------------------------------------------------------------------
1 | // In production, we register a service worker to serve assets from local cache.
2 |
3 | // This lets the app load faster on subsequent visits in production, and gives
4 | // it offline capabilities. However, it also means that developers (and users)
5 | // will only see deployed updates on the "N+1" visit to a page, since previously
6 | // cached resources are updated in the background.
7 |
8 | // To learn more about the benefits of this model, read https://goo.gl/KwvDNy.
9 | // This link also includes instructions on opting out of this behavior.
10 |
11 | const isLocalhost = Boolean(
12 | window.location.hostname === 'localhost' ||
13 | // [::1] is the IPv6 localhost address.
14 | window.location.hostname === '[::1]' ||
15 | // 127.0.0.1/8 is considered localhost for IPv4.
16 | window.location.hostname.match(
17 | /^127(?:\.(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)){3}$/
18 | )
19 | );
20 |
21 | export default function register() {
22 | if (process.env.NODE_ENV === 'production' && 'serviceWorker' in navigator) {
23 | // The URL constructor is available in all browsers that support SW.
24 | const publicUrl = new URL(process.env.PUBLIC_URL, window.location);
25 | if (publicUrl.origin !== window.location.origin) {
26 | // Our service worker won't work if PUBLIC_URL is on a different origin
27 | // from what our page is served on. This might happen if a CDN is used to
28 | // serve assets; see https://github.com/facebookincubator/create-react-app/issues/2374
29 | return;
30 | }
31 |
32 | window.addEventListener('load', () => {
33 | const swUrl = `${process.env.PUBLIC_URL}/service-worker.js`;
34 |
35 | if (isLocalhost) {
36 | // This is running on localhost. Lets check if a service worker still exists or not.
37 | checkValidServiceWorker(swUrl);
38 | } else {
39 | // Is not local host. Just register service worker
40 | registerValidSW(swUrl);
41 | }
42 | });
43 | }
44 | }
45 |
46 | function registerValidSW(swUrl) {
47 | navigator.serviceWorker
48 | .register(swUrl)
49 | .then(registration => {
50 | registration.onupdatefound = () => {
51 | const installingWorker = registration.installing;
52 | installingWorker.onstatechange = () => {
53 | if (installingWorker.state === 'installed') {
54 | if (navigator.serviceWorker.controller) {
55 | // At this point, the old content will have been purged and
56 | // the fresh content will have been added to the cache.
57 | // It's the perfect time to display a "New content is
58 | // available; please refresh." message in your web app.
59 | console.log('New content is available; please refresh.');
60 | } else {
61 | // At this point, everything has been precached.
62 | // It's the perfect time to display a
63 | // "Content is cached for offline use." message.
64 | console.log('Content is cached for offline use.');
65 | }
66 | }
67 | };
68 | };
69 | })
70 | .catch(error => {
71 | console.error('Error during service worker registration:', error);
72 | });
73 | }
74 |
75 | function checkValidServiceWorker(swUrl) {
76 | // Check if the service worker can be found. If it can't reload the page.
77 | fetch(swUrl)
78 | .then(response => {
79 | // Ensure service worker exists, and that we really are getting a JS file.
80 | if (
81 | response.status === 404 ||
82 | response.headers.get('content-type').indexOf('javascript') === -1
83 | ) {
84 | // No service worker found. Probably a different app. Reload the page.
85 | navigator.serviceWorker.ready.then(registration => {
86 | registration.unregister().then(() => {
87 | window.location.reload();
88 | });
89 | });
90 | } else {
91 | // Service worker found. Proceed as normal.
92 | registerValidSW(swUrl);
93 | }
94 | })
95 | .catch(() => {
96 | console.log(
97 | 'No internet connection found. App is running in offline mode.'
98 | );
99 | });
100 | }
101 |
102 | export function unregister() {
103 | if ('serviceWorker' in navigator) {
104 | navigator.serviceWorker.ready.then(registration => {
105 | registration.unregister();
106 | });
107 | }
108 | }
109 |
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