|
|
@@ -1,145 +0,0 @@
|
|
1
|
|
-// This optional code is used to register a service worker.
|
|
2
|
|
-// register() is not called by default.
|
|
3
|
|
-
|
|
4
|
|
-// This lets the app load faster on subsequent visits in production, and gives
|
|
5
|
|
-// it offline capabilities. However, it also means that developers (and users)
|
|
6
|
|
-// will only see deployed updates on subsequent visits to a page, after all the
|
|
7
|
|
-// existing tabs open on the page have been closed, since previously cached
|
|
8
|
|
-// resources are updated in the background.
|
|
9
|
|
-
|
|
10
|
|
-// To learn more about the benefits of this model and instructions on how to
|
|
11
|
|
-// opt-in, read https://bit.ly/CRA-PWA
|
|
12
|
|
-
|
|
13
|
|
-const isLocalhost = Boolean(
|
|
14
|
|
- window.location.hostname === 'localhost' ||
|
|
15
|
|
- // [::1] is the IPv6 localhost address.
|
|
16
|
|
- window.location.hostname === '[::1]' ||
|
|
17
|
|
- // 127.0.0.0/8 are considered localhost for IPv4.
|
|
18
|
|
- window.location.hostname.match(
|
|
19
|
|
- /^127(?:\.(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)){3}$/
|
|
20
|
|
- )
|
|
21
|
|
-);
|
|
22
|
|
-
|
|
23
|
|
-type Config = {
|
|
24
|
|
- onSuccess?: (registration: ServiceWorkerRegistration) => void;
|
|
25
|
|
- onUpdate?: (registration: ServiceWorkerRegistration) => void;
|
|
26
|
|
-};
|
|
27
|
|
-
|
|
28
|
|
-export function register(config?: Config) {
|
|
29
|
|
- if (process.env.NODE_ENV === 'production' && 'serviceWorker' in navigator) {
|
|
30
|
|
- // The URL constructor is available in all browsers that support SW.
|
|
31
|
|
- const publicUrl = new URL(
|
|
32
|
|
- process.env.PUBLIC_URL,
|
|
33
|
|
- window.location.href
|
|
34
|
|
- );
|
|
35
|
|
- if (publicUrl.origin !== window.location.origin) {
|
|
36
|
|
- // Our service worker won't work if PUBLIC_URL is on a different origin
|
|
37
|
|
- // from what our page is served on. This might happen if a CDN is used to
|
|
38
|
|
- // serve assets; see https://github.com/facebook/create-react-app/issues/2374
|
|
39
|
|
- return;
|
|
40
|
|
- }
|
|
41
|
|
-
|
|
42
|
|
- window.addEventListener('load', () => {
|
|
43
|
|
- const swUrl = `${process.env.PUBLIC_URL}/service-worker.js`;
|
|
44
|
|
-
|
|
45
|
|
- if (isLocalhost) {
|
|
46
|
|
- // This is running on localhost. Let's check if a service worker still exists or not.
|
|
47
|
|
- checkValidServiceWorker(swUrl, config);
|
|
48
|
|
-
|
|
49
|
|
- // Add some additional logging to localhost, pointing developers to the
|
|
50
|
|
- // service worker/PWA documentation.
|
|
51
|
|
- navigator.serviceWorker.ready.then(() => {
|
|
52
|
|
- console.log(
|
|
53
|
|
- 'This web app is being served cache-first by a service ' +
|
|
54
|
|
- 'worker. To learn more, visit https://bit.ly/CRA-PWA'
|
|
55
|
|
- );
|
|
56
|
|
- });
|
|
57
|
|
- } else {
|
|
58
|
|
- // Is not localhost. Just register service worker
|
|
59
|
|
- registerValidSW(swUrl, config);
|
|
60
|
|
- }
|
|
61
|
|
- });
|
|
62
|
|
- }
|
|
63
|
|
-}
|
|
64
|
|
-
|
|
65
|
|
-function registerValidSW(swUrl: string, config?: Config) {
|
|
66
|
|
- navigator.serviceWorker
|
|
67
|
|
- .register(swUrl)
|
|
68
|
|
- .then(registration => {
|
|
69
|
|
- registration.onupdatefound = () => {
|
|
70
|
|
- const installingWorker = registration.installing;
|
|
71
|
|
- if (installingWorker == null) {
|
|
72
|
|
- return;
|
|
73
|
|
- }
|
|
74
|
|
- installingWorker.onstatechange = () => {
|
|
75
|
|
- if (installingWorker.state === 'installed') {
|
|
76
|
|
- if (navigator.serviceWorker.controller) {
|
|
77
|
|
- // At this point, the updated precached content has been fetched,
|
|
78
|
|
- // but the previous service worker will still serve the older
|
|
79
|
|
- // content until all client tabs are closed.
|
|
80
|
|
- console.log(
|
|
81
|
|
- 'New content is available and will be used when all ' +
|
|
82
|
|
- 'tabs for this page are closed. See https://bit.ly/CRA-PWA.'
|
|
83
|
|
- );
|
|
84
|
|
-
|
|
85
|
|
- // Execute callback
|
|
86
|
|
- if (config && config.onUpdate) {
|
|
87
|
|
- config.onUpdate(registration);
|
|
88
|
|
- }
|
|
89
|
|
- } else {
|
|
90
|
|
- // At this point, everything has been precached.
|
|
91
|
|
- // It's the perfect time to display a
|
|
92
|
|
- // "Content is cached for offline use." message.
|
|
93
|
|
- console.log('Content is cached for offline use.');
|
|
94
|
|
-
|
|
95
|
|
- // Execute callback
|
|
96
|
|
- if (config && config.onSuccess) {
|
|
97
|
|
- config.onSuccess(registration);
|
|
98
|
|
- }
|
|
99
|
|
- }
|
|
100
|
|
- }
|
|
101
|
|
- };
|
|
102
|
|
- };
|
|
103
|
|
- })
|
|
104
|
|
- .catch(error => {
|
|
105
|
|
- console.error('Error during service worker registration:', error);
|
|
106
|
|
- });
|
|
107
|
|
-}
|
|
108
|
|
-
|
|
109
|
|
-function checkValidServiceWorker(swUrl: string, config?: Config) {
|
|
110
|
|
- // Check if the service worker can be found. If it can't reload the page.
|
|
111
|
|
- fetch(swUrl, {
|
|
112
|
|
- headers: { 'Service-Worker': 'script' }
|
|
113
|
|
- })
|
|
114
|
|
- .then(response => {
|
|
115
|
|
- // Ensure service worker exists, and that we really are getting a JS file.
|
|
116
|
|
- const contentType = response.headers.get('content-type');
|
|
117
|
|
- if (
|
|
118
|
|
- response.status === 404 ||
|
|
119
|
|
- (contentType != null && contentType.indexOf('javascript') === -1)
|
|
120
|
|
- ) {
|
|
121
|
|
- // No service worker found. Probably a different app. Reload the page.
|
|
122
|
|
- navigator.serviceWorker.ready.then(registration => {
|
|
123
|
|
- registration.unregister().then(() => {
|
|
124
|
|
- window.location.reload();
|
|
125
|
|
- });
|
|
126
|
|
- });
|
|
127
|
|
- } else {
|
|
128
|
|
- // Service worker found. Proceed as normal.
|
|
129
|
|
- registerValidSW(swUrl, config);
|
|
130
|
|
- }
|
|
131
|
|
- })
|
|
132
|
|
- .catch(() => {
|
|
133
|
|
- console.log(
|
|
134
|
|
- 'No internet connection found. App is running in offline mode.'
|
|
135
|
|
- );
|
|
136
|
|
- });
|
|
137
|
|
-}
|
|
138
|
|
-
|
|
139
|
|
-export function unregister() {
|
|
140
|
|
- if ('serviceWorker' in navigator) {
|
|
141
|
|
- navigator.serviceWorker.ready.then(registration => {
|
|
142
|
|
- registration.unregister();
|
|
143
|
|
- });
|
|
144
|
|
- }
|
|
145
|
|
-}
|
