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A minimal serviceworker for websites built with AMP.
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| <!doctype html> | |
| <html ⚡> | |
| <head> | |
| <meta charset="utf-8"> | |
| <meta name="viewport" content="width=device-width,minimum-scale=1"> | |
| <meta name="description" content="{{desc}}."> | |
| <link rel="preload" as="script" href="https://cdn.ampproject.org/v0.js"> | |
| <script async src="https://cdn.ampproject.org/v0.js"></script> | |
| <script async custom-element="amp-install-serviceworker" src="https://cdn.ampproject.org/v0/amp-install-serviceworker-0.1.js"></script> | |
| <style amp-custom> | |
| h1 { | |
| margin: 1rem; | |
| } | |
| </style> | |
| <style amp-boilerplate>body{-webkit-animation:-amp-start 8s steps(1,end) 0s 1 normal both;-moz-animation:-amp-start 8s steps(1,end) 0s 1 normal both;-ms-animation:-amp-start 8s steps(1,end) 0s 1 normal both;animation:-amp-start 8s steps(1,end) 0s 1 normal both}@-webkit-keyframes -amp-start{from{visibility:hidden}to{visibility:visible}}@-moz-keyframes -amp-start{from{visibility:hidden}to{visibility:visible}}@-ms-keyframes -amp-start{from{visibility:hidden}to{visibility:visible}}@-o-keyframes -amp-start{from{visibility:hidden}to{visibility:visible}}@keyframes -amp-start{from{visibility:hidden}to{visibility:visible}}</style><noscript><style amp-boilerplate>body{-webkit-animation:none;-moz-animation:none;-ms-animation:none;animation:none}</style></noscript> | |
| <link rel="canonical" href="index.html" /> | |
| <link rel="manifest" href="/manifest.json"> | |
| <link rel="icon" href="/images/icons/favicon.ico"> | |
| <title>{{title}}</title> | |
| </head> | |
| <body> | |
| <h1>Hello AMPHTML World!</h1> | |
| <amp-install-serviceworker src="/sw.js" data-iframe-src="/sw.html" layout="nodisplay"></amp-install-serviceworker> | |
| </body> | |
| </html> |
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| <!doctype html> | |
| <title>installing service worker</title> | |
| <script type='text/javascript'> | |
| if('serviceWorker' in navigator) { | |
| navigator.serviceWorker.register('/sw.js'); | |
| }; | |
| </script> |
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| importScripts('https://storage.googleapis.com/workbox-cdn/releases/3.4.1/workbox-sw.js'); | |
| workbox.skipWaiting(); | |
| workbox.clientsClaim(); | |
| // Provide an URL to enable a custom offline page | |
| const OFFLINE_PAGE = "/offline.html"; | |
| //Pre-cache the AMP Runtime | |
| self.addEventListener('install', event => { | |
| const urls = [ | |
| 'https://cdn.ampproject.org/v0.js', | |
| // Add AMP extensions used on your pages | |
| // Add fonts, icons, logos used on your pages | |
| ]; | |
| if (OFFLINE_PAGE) { | |
| urls.push(OFFLINE_PAGE); | |
| } | |
| event.waitUntil( | |
| caches.open(workbox.core.cacheNames.runtime).then(cache => cache.addAll(urls)) | |
| ); | |
| }); | |
| // Enable navigation preload . This is only necessary if navigation routes are not cached, | |
| // see: https://developers.google.com/web/tools/workbox/modules/workbox-navigation-preload | |
| workbox.navigationPreload.enable(); | |
| // Fallback to an offline page for navgiation requests if there is no | |
| // network connection | |
| let navigationStrategy; | |
| if (OFFLINE_PAGE) { | |
| const networkFirstWithOfflinePage = async (args) => { | |
| const response = await workbox.strategies.networkFirst().handle(args); | |
| if ( response) { | |
| return response; | |
| } | |
| return caches.match(OFFLINE_PAGE); | |
| } | |
| navigationStrategy = networkFirstWithOfflinePage; | |
| } else { | |
| navigationStrategy = workbox.strategies.networkFirst(); | |
| } | |
| const navigationRoute = new workbox.routing.NavigationRoute(navigationStrategy, { | |
| // Optionally, provide a white/blacklist of RegExps to determine | |
| // which paths will match this route. | |
| // whitelist: [], | |
| // blacklist: [], | |
| }); | |
| workbox.routing.registerRoute(navigationRoute); | |
| // By default Use a network first strategy to ensure the latest content is used | |
| workbox.routing.setDefaultHandler(workbox.strategies.networkFirst()); | |
| // Serve the AMP Runtime from cache and check for an updated version in the background | |
| workbox.routing.registerRoute( | |
| /https:\/\/cdn\.ampproject\.org\/.*/, | |
| workbox.strategies.staleWhileRevalidate() | |
| ); | |
| // Cache Images | |
| workbox.routing.registerRoute( | |
| /\.(?:png|gif|jpg|jpeg|svg)$/, | |
| workbox.strategies.cacheFirst({ | |
| cacheName: 'images', | |
| plugins: [ | |
| new workbox.expiration.Plugin({ | |
| maxEntries: 60, | |
| maxAgeSeconds: 30 * 24 * 60 * 60, // 30 Days | |
| }), | |
| ], | |
| }), | |
| ); | |
| // Google Font Caching | |
| // see https://developers.google.com/web/tools/workbox/guides/common-recipes#google_fonts | |
| workbox.routing.registerRoute( | |
| new RegExp('https://fonts.(?:googleapis|gstatic).com/(.*)'), | |
| workbox.strategies.cacheFirst({ | |
| cacheName: 'googleapis', | |
| plugins: [ | |
| new workbox.cacheableResponse.Plugin({ | |
| statuses: [0, 200] | |
| }), | |
| new workbox.expiration.Plugin({ | |
| maxEntries: 30, | |
| }), | |
| ], | |
| }), | |
| ); |
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Hi,
In this line of code
<meta name="description" content="{{desc}}.">Will you please explain how you adding dynamic description in AMP page.
Thanks