diff options
| author | bndw <benjamindwoodward@gmail.com> | 2020-05-31 09:38:39 -0700 |
|---|---|---|
| committer | bndw <benjamindwoodward@gmail.com> | 2020-05-31 09:38:39 -0700 |
| commit | cc214ac6a490ce9840356434a8e0c4334aeb9282 (patch) | |
| tree | 79e92d5de1de1c6dcbb5fcc41a4d028e6cfcf78c /src/serviceWorker.js | |
| parent | 8739544d16aaccf9e03c2ef1d07d4b144b0b48e7 (diff) | |
:fire: Remove create-react-app boilerplate
Diffstat (limited to 'src/serviceWorker.js')
| -rw-r--r-- | src/serviceWorker.js | 141 |
1 files changed, 0 insertions, 141 deletions
diff --git a/src/serviceWorker.js b/src/serviceWorker.js deleted file mode 100644 index b04b771..0000000 --- a/src/serviceWorker.js +++ /dev/null | |||
| @@ -1,141 +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}$/ | ||
| 20 | ) | ||
| 21 | ); | ||
| 22 | |||
| 23 | export function register(config) { | ||
| 24 | if (process.env.NODE_ENV === 'production' && 'serviceWorker' in navigator) { | ||
| 25 | // The URL constructor is available in all browsers that support SW. | ||
| 26 | const publicUrl = new URL(process.env.PUBLIC_URL, window.location.href); | ||
| 27 | if (publicUrl.origin !== window.location.origin) { | ||
| 28 | // Our service worker won't work if PUBLIC_URL is on a different origin | ||
| 29 | // from what our page is served on. This might happen if a CDN is used to | ||
| 30 | // serve assets; see https://github.com/facebook/create-react-app/issues/2374 | ||
| 31 | return; | ||
| 32 | } | ||
| 33 | |||
| 34 | window.addEventListener('load', () => { | ||
| 35 | const swUrl = `${process.env.PUBLIC_URL}/service-worker.js`; | ||
| 36 | |||
| 37 | if (isLocalhost) { | ||
| 38 | // This is running on localhost. Let's check if a service worker still exists or not. | ||
| 39 | checkValidServiceWorker(swUrl, config); | ||
| 40 | |||
| 41 | // Add some additional logging to localhost, pointing developers to the | ||
| 42 | // service worker/PWA documentation. | ||
| 43 | navigator.serviceWorker.ready.then(() => { | ||
| 44 | console.log( | ||
| 45 | 'This web app is being served cache-first by a service ' + | ||
| 46 | 'worker. To learn more, visit https://bit.ly/CRA-PWA' | ||
| 47 | ); | ||
| 48 | }); | ||
| 49 | } else { | ||
| 50 | // Is not localhost. Just register service worker | ||
| 51 | registerValidSW(swUrl, config); | ||
| 52 | } | ||
| 53 | }); | ||
| 54 | } | ||
| 55 | } | ||
| 56 | |||
| 57 | function registerValidSW(swUrl, config) { | ||
| 58 | navigator.serviceWorker | ||
| 59 | .register(swUrl) | ||
| 60 | .then(registration => { | ||
| 61 | registration.onupdatefound = () => { | ||
| 62 | const installingWorker = registration.installing; | ||
| 63 | if (installingWorker == null) { | ||
| 64 | return; | ||
| 65 | } | ||
| 66 | installingWorker.onstatechange = () => { | ||
| 67 | if (installingWorker.state === 'installed') { | ||
| 68 | if (navigator.serviceWorker.controller) { | ||
| 69 | // At this point, the updated precached content has been fetched, | ||
| 70 | // but the previous service worker will still serve the older | ||
| 71 | // content until all client tabs are closed. | ||
| 72 | console.log( | ||
| 73 | 'New content is available and will be used when all ' + | ||
| 74 | 'tabs for this page are closed. See https://bit.ly/CRA-PWA.' | ||
| 75 | ); | ||
| 76 | |||
| 77 | // Execute callback | ||
| 78 | if (config && config.onUpdate) { | ||
| 79 | config.onUpdate(registration); | ||
| 80 | } | ||
| 81 | } else { | ||
| 82 | // At this point, everything has been precached. | ||
| 83 | // It's the perfect time to display a | ||
| 84 | // "Content is cached for offline use." message. | ||
| 85 | console.log('Content is cached for offline use.'); | ||
| 86 | |||
| 87 | // Execute callback | ||
| 88 | if (config && config.onSuccess) { | ||
| 89 | config.onSuccess(registration); | ||
| 90 | } | ||
| 91 | } | ||
| 92 | } | ||
| 93 | }; | ||
| 94 | }; | ||
| 95 | }) | ||
| 96 | .catch(error => { | ||
| 97 | console.error('Error during service worker registration:', error); | ||
| 98 | }); | ||
| 99 | } | ||
| 100 | |||
| 101 | function checkValidServiceWorker(swUrl, config) { | ||
| 102 | // Check if the service worker can be found. If it can't reload the page. | ||
| 103 | fetch(swUrl, { | ||
| 104 | headers: { 'Service-Worker': 'script' }, | ||
| 105 | }) | ||
| 106 | .then(response => { | ||
| 107 | // Ensure service worker exists, and that we really are getting a JS file. | ||
| 108 | const contentType = response.headers.get('content-type'); | ||
| 109 | if ( | ||
| 110 | response.status === 404 || | ||
| 111 | (contentType != null && contentType.indexOf('javascript') === -1) | ||
| 112 | ) { | ||
| 113 | // No service worker found. Probably a different app. Reload the page. | ||
| 114 | navigator.serviceWorker.ready.then(registration => { | ||
| 115 | registration.unregister().then(() => { | ||
| 116 | window.location.reload(); | ||
| 117 | }); | ||
| 118 | }); | ||
| 119 | } else { | ||
| 120 | // Service worker found. Proceed as normal. | ||
| 121 | registerValidSW(swUrl, config); | ||
| 122 | } | ||
| 123 | }) | ||
| 124 | .catch(() => { | ||
| 125 | console.log( | ||
| 126 | 'No internet connection found. App is running in offline mode.' | ||
| 127 | ); | ||
| 128 | }); | ||
| 129 | } | ||
| 130 | |||
| 131 | export function unregister() { | ||
| 132 | if ('serviceWorker' in navigator) { | ||
| 133 | navigator.serviceWorker.ready | ||
| 134 | .then(registration => { | ||
| 135 | registration.unregister(); | ||
| 136 | }) | ||
| 137 | .catch(error => { | ||
| 138 | console.error(error.message); | ||
| 139 | }); | ||
| 140 | } | ||
| 141 | } | ||
