0.0.3 • Published 5 years ago
jfa-pwa-toolkit v0.0.3
jfa-pwa-toolkit
Add Progressive Web Apps (PWA) Features to Any website very Easy and Fast ⚡️
Set a simple configuration file or exploit more features with the easy-to-use library in your js code.
Note: This project is Beta
Attention: THIS DOCUMENTATION IS THE OLDER VERSION!
Features
- Web App Manifest
- Icons Structure Files
- Add to Home Screen (A2HS)
- Offline Work Mode
- Precaching
- Caching Strategies
- Push Notifications
Demo
Requirements
This package uses Workbox internally but you do not need to import it.
Starting with an Example
Getting Started
Clone the repository
$ git clone git@github.com:jfadev/jfa-pwa-toolkit.gitCreate the app icons manually or with the tool PWA Image Generator and replace files in /pwa/icons/.
If you have moved the pwa folder somewhere else in your project, edit the PWA_ROOT variable in your /sw.js file. It is important that the file sw.js is in the root of your site.
Edit the template of your project to include the metatags and scripts needed as in the following example.
Attention with the paths if you decided to move the pwa folder
<!DOCTYPE html>
<html lang="en-us">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no" name="viewport">
<!-- Theme color -->
<meta name="theme-color" content="#000" />
<!-- PWA Manifest -->
<link rel="manifest" href="/pwa/manifest.json"></link>
<!-- Favicon -->
<link rel="icon" type="image/png" href="/pwa/icons/chrome/chrome-favicon-16-16.png">
<!-- Only for iOS: Configs -->
<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-status-bar-style" content="black">
<meta name="apple-mobile-web-app-title" content="jfaPWAtk">
<!-- Icons -->
<link rel="apple-touch-icon" href="/pwa/icons/ios/ios-appicon-76-76.png">
<link rel="apple-touch-icon" href="/pwa/icons/ios/ios-appicon-120-120.png" sizes="120x120">
<link rel="apple-touch-icon" href="/pwa/icons/ios/ios-appicon-152-152.png" sizes="152x152">
<link rel="apple-touch-icon" href="/pwa/icons/ios/ios-appicon-180-180.png" sizes="180x180">
<link rel="apple-touch-icon" href="/pwa/icons/ios/ios-appicon-1024-1024.png" sizes="1024x1024">
<!-- Splash Screen -->
<link rel="apple-touch-startup-image" href="/pwa/icons/ios/ios-launchimage-640-960.png" sizes="640x960">
<link rel="apple-touch-startup-image" href="/pwa/icons/ios/ios-launchimage-640-1136.png" sizes="640x1136">
<link rel="apple-touch-startup-image" href="/pwa/icons/ios/ios-launchimage-750-1334.png" sizes="750x1334">
<link rel="apple-touch-startup-image" href="/pwa/icons/ios/ios-launchimage-768-1024.png" sizes="768x1024">
<link rel="apple-touch-startup-image" href="/pwa/icons/ios/ios-launchimage-1024-768.png" sizes="1024x768">
<link rel="apple-touch-startup-image" href="/pwa/icons/ios/ios-launchimage-1242-2208.png" sizes="1242x2208">
<link rel="apple-touch-startup-image" href="/pwa/icons/ios/ios-launchimage-1334-750.png" sizes="1334x750">
<link rel="apple-touch-startup-image" href="/pwa/icons/ios/ios-launchimage-1536-2048.png" sizes="1536x2048">
<link rel="apple-touch-startup-image" href="/pwa/icons/ios/ios-launchimage-2048-1536.png" sizes="2048x1536">
<link rel="apple-touch-startup-image" href="/pwa/icons/ios/ios-launchimage-2208-1242.png" sizes="2208x1242">
<title>JFA PWA Toolkit Example</title>
</head>
<body>
<!-- Load JFA PWA Toolkit Configs -->
<script type="text/javascript" src="/pwa/config.js"></script>
<!-- Load JFA PWA Toolkit Lib -->
<script type="text/javascript" src="/pwa/pwa.js"></script>
<!-- Register principal Service Worker -->
<script type="text/javascript">
PWA.ServiceWorker.register();
</script>
</body>
</html>Edit the manifest file /pwa/manifest.json.
You can rename manifest.json to app.webmanifest if you prefer Reccomended by W3C.
Attention with the paths of icons if you decided to move the pwa folder
{
"name": "Your App Name",
"short_name": "Your App Short Name",
"description": "Your App Description.",
"orientation": "any",
"theme_color": "#000",
"background_color": "#000",
"icons": [{
"src": "/pwa/icons/windows10/Square71x71Logo.scale-400.png",
"sizes": "284x284"
},
]
}Edit the config file /pwa/config.js.
Attention with the paths of icons if you decided to move the pwa folder
const PWA_CONFIG = {
// App config
app: {
// App name
name: 'your-app-name',
// App version
version: 'v1',
},
// Service Worker config
sw: {
// Main service worker filepath (always root of project)
filepath: '/sw.js',
// Route of offline page
offline_route: '/pwa/errors/offline/',
},
// Push manager config
push: {
// Enable/disable push notifications
active: true,
// Server config
server: {
// API public key
public_key: 'YOURAPIPUBLICKEY',
// Subscription API endpoint
endpoint: '/api/push/subscription/',
},
// Notification config
notification: {
// Title of notifications from the server
title: 'Your App Name',
// Options object same that showNotification() options
// (https://developer.mozilla.org/es/docs/Web/API/ServiceWorkerRegistration/showNotification)
options: {
// A string representing an extra content to display within the notification
body: '',
// he URL of an image to be used as an icon by the notification
icon: '/pwa/icons/firefox/firefox-general-64-64.png',
// A vibration pattern to run with the display of the notification.
// A vibration pattern can be an array with as few as one member.
// The values are times in milliseconds where the even indices (0, 2, 4, etc.)
// indicate how long to vibrate and the odd indices indicate how long to pause.
// For example [300, 100, 400] would vibrate 300ms, pause 100ms, then vibrate 400ms.
vibrate: [100, 50, 100],
// Arbitrary data that you want associated with the notification. This can be of any data type
data: {
dateOfArrival: Date.now(),
primaryKey: '1',
clickUrl: '',
},
},
// notification click event
notificationclick: {
// Enable/disable notification click event
active: true,
}
}
},
// Cache config
cache: {
// Images cache config (png|jpg|jpeg|svg|gif)
images: {
// Enable/disable images caching
active: true,
// The maximum number of entries to cache.
// Entries used the least will be removed as the maximum is reached.
maxentries: 500,
// The maximum age of an entry before it's treated as stale and removed.
maxageseconds: 365 * 24 * 60 * 60,
},
// Static files cache config (js|json|css)
statics: {
// Enable/disable static files caching
active: true,
// The maximum number of entries to cache.
// Entries used the least will be removed as the maximum is reached.
maxentries: 500,
// The maximum age of an entry before it's treated as stale and removed.
maxageseconds: 365 * 24 * 60 * 60,
},
// Fonts cache config (eot|ttf|woff|woff2|otf)
// with cross-origin requests example google fonts
fonts: {
// Enable/disable fonts caching
active: true,
// The maximum number of entries to cache.
// Entries used the least will be removed as the maximum is reached.
maxentries: 500,
// The maximum age of an entry before it's treated as stale and removed.
maxageseconds: 365 * 24 * 60 * 60,
},
routes: {
// Force the response to come from the network
networkonly: {
// Enable/disable network only routes caching
active: true,
// Matching routes with a Regular Expression
regex: /\/(?:login|logout)\//,
},
// Resources are requested from both the cache and the network in parallel.
// The strategy will respond with the cached version if available,
// otherwise wait for the network response.
// The cache is updated with the network response with each successful request.
stalewhilerevalidate: {
active: true,
regex: /\/news\/.*/,
},
// Network first request strategy.
networkfirst: {
active: true,
regex: /.*/,
},
// Cache first request strategy.
cachefirst: {
active: false,
// regex: /.*/,
// maxentries: 500,
// maxageseconds: 365 * 24 * 60 * 60,
},
// Force the response to come from the browser.
cacheonly: {
active: false,
// regex: /.*/,
},
},
// Add your custom service worker for load it.
custom: {
active: false,
// service worker script route
// script: '/pwa/sw/my-custom-sw.js',
},
},
// Precache config
precache: {
// Enable/disable precaching
active: true,
// Routes to
routes: [
'/assets/example.css',
'/assets/example.png',
'/assets/example.js',
],
},
}At this point your PWA is able to precache static resources, cache the different resources for offline access, icons, splash screen and add to home screen.
You may need more features, for this we will use the classes and methods offered by the global variable PWA that will allow us to do things like subscription to push notifications among other things.
Code Examples
Button to subscribe to Push Notifications
<button type="button" id="btn-subscription">
Subscribe to recive Push Notifications
</button>document
.getElementById('btn-subscription')
.addEventListener('click', () => {
if (
PWA.Notification.isDefault() ||
PWA.Notification.isGranted()
) {
PWA.Push.getSubscription((subscription) => {
if (subscription) {
console.log('You are now subscribed to receive Push Notifications!');
} else {
PWA.Push.subscribe((r) => {
console.log('Congratulations! You are subscribed to receive Push Notifications!');
});
}
});
} else {
console.log("You've turned off Push Notifications. Allow Push Notifications in your browser settings.");
}
})
;Checkbox toggle to subscribe/unsubscribe to Push Notifications
<input type="checkbox" id="toggle-subscription"> Push Notificationsdocument
.getElementById('toggle-subscription')
.addEventListener('change', () => {
if (
PWA.Notification.isDefault() ||
PWA.Notification.isGranted()
) {
PWA.Push.getSubscription((subscription) => {
if (subscription) {
PWA.Push.unsubscribe((r) => {
console.log('You have been unsubscribed to receive Push Notifications!');
});
} else {
PWA.Push.subscribe((r) => {
console.log('You are now subscribed to receive Push Notifications!');
});
}
});
} else {
console.log("You've turned off Push Notifications. Allow Push Notifications in your browser settings.");
}
})
;Check the Notifications permissions
Default status
if (PWA.Notification.isDefault()) {
console.log('Permission for Notifications are with default status.');
} else {
console.log('Permission for Notifications are not with default status.');
}Granted status
if (PWA.Notification.isGranted()) {
console.log('Permission for Notifications was granted!');
} else {
console.log('Permission for Notifications was not granted!');
}Blocked status
if (PWA.Notification.isBlocked()) {
console.log('Permission for Notifications was blocked.');
} else {
console.log('Permission for Notifications was not blocked.');
}Denied status
if (PWA.Notification.isDenied()) {
console.log('Permission for Notifications was denied.');
} else {
console.log('Permission for Notifications was not denied.');
}Displays a pop-up requesting permission to allow Notifications
PWA.Notification.requestPermission((status) => {
console.log('Notification permission status:', status);
});Get the Notifications permission status
var permission = PWA.Notification.getPermission();Show Notification sent by the browser
const options = {
body: 'Extra content to display within the notification',
icon: '../images/touch/chrome-touch-icon-192x192.png'
};
PWA.Notification.show('Notification Title', options, sent => {
if (sent) {
console.log('The Notification has been sent');
}
});Register the main service worker
PWA.ServiceWorker.register();Get the Registration object of the service worker
PWA.ServiceWorker.getRegistration((registration) => {
if (registration) {
console.log(registration);
} else {
console.log('The Service Worker is not registered!');
}
});Check if the browser support Service Workers
if (PWA.Navigator.isSupportedServiceWorker()) {
console.log('This browser support Service Workers!');
} else {
console.log('This browser does not support Service Workers.');
}Check if the browser support Notifications
if (PWA.Navigator.isSupportedNotification()) {
console.log('This browser support Notifications!');
} else {
console.log('This browser does not support Notifications.');
}Check if the browser is offline
if (PWA.Navigator.isOffline()) {
console.log('No Internet connection!');
} else {
console.log('You have an Internet connection!');
}Clear the browser app cache
PWA.Navigator.clearCache();Documentation
Playground
License
JFA PWA Toolkit is MIT licensed, as found in the LICENSE file.