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Progressive WEB APPS

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@cironunesdev

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Progressive Web App

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Progressive Web App Enhancement

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Progressive Web App Enhancement Like

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http://alistapart.com/article/understandingprogressiveenhancement

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http://alistapart.com/article/understandingprogressiveenhancement

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App Like

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RESPONSIVE CONNECTIVITY INDEPENDENT DISCOVERABLE ENGAGEABLE INSTALLABLE SAFE LINKABLE

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App Like, but…

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Service Workers Cache API Fetch API Notification API HTTPS ❤ }

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How to build a PWA?

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1. Web Application Manifest 2. App Shell 3. Cache (SW)

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{ "name": "Ali Express", "short_name": "AliExpress", "icons": [{ "src": "images/icons/icon-128x128.png", "sizes": "128x128", "type": "image/png" }], "start_url": "/index.html", "display": "standalone", "background_color": "#3E4EB8", "theme_color": "#2F3BA2" } manifest.webapp

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Splash Screen

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1. Web Application Manifest 2. App Shell 3. Cache (SW)

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1. Architect & implement your app shell 2. Cache via service workers

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App shell

Menu ... ...

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1. Architect & implement your app shell 2. Cache via service workers

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if ('serviceWorker' in navigator) { navigator['serviceWorker'] .register('./service-worker.js') .then(() => console.log('Service Worker Registered')); } main.ts REGISTER

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var cacheName = 'myApp'; var filesToCache = [...]; self.addEventListener('install', function(e) { e.waitUntil( caches.open(cacheName).then(function(cache) { return cache.addAll(filesToCache); }) ); }); service-worker.js ADD TO CACHE

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self.addEventListener('activate', (e) => { e.waitUntil(self.clients.claim()); e.waitUntil( caches.keys().then((keyList) => { return Promise.all(keyList.map((key) => { if (key !== cacheName) { return caches.delete(key); } })); }) ); }); service-worker.js CLEAR CACHE

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self.addEventListener('fetch', (e) => { e.respondWith( caches.match(e.request).then((response) => { return response || fetch(e.request); }) ); }); service-worker.js READING FROM CACHE

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1. Web Application Manifest 2. App Shell 3. Cache (SW)

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self.addEventListener('fetch', function(e) { var dataUrl = 'https://sample-api.com'; if (e.request.url.indexOf(dataUrl) > -1) { e.respondWith( caches.open(dataCacheName).then(function(cache) { return fetch(e.request).then(function(response){ cache.put(e.request.url, response.clone()); return response; }); }) ); } else { e.respondWith( caches.match(e.request).then(function(response) { return response || fetch(e.request); }) ); } }); service-worker.js

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caches.match(e.request.clone()).then((response) => { return response || fetch(e.request.clone()).then((theResponse) => { return caches.open(dataCacheName).then((cache) => { cache.put(e.request.url, theResponse.clone()); return theResponse.clone(); }); }); }); service-worker.js

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Proﬁt!

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Proﬁt! What about a protip?

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Lighthouse

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Bootstrap App shell Service worker Notiﬁcations

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Bootstrap App shell Service worker Notiﬁcations

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~ $ npm i --save @angular/app-shell

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~ $ npm i --save @angular/app-shell // App code import { AppShellModule } from '@angular/app-shell'; @NgModule({ bootstrap: [AppComponent], imports: [ BrowserModule, AppShellModule.runtime(), AppModule })

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@Component({ selector: 'app-root-component', template: ` ` }) export class AppRootComponent {}

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Can we be faster?

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@NgModule({ bootstrap: [AppComponent], imports: [ AppShellModule.prerender(), AppModule, UniversalModule.withConfig({...}) })

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Bootstrap App shell Service worker Notiﬁcations

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~ $ npm i --save @angular/service-worker

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~ $ npm i --save @angular/service-worker // worker-basic.min.js is copied from // node_modules/@angular/service-worker/bundles if (navigator.serviceWorker) { navigator.serviceWorker.register('/worker-basic.min.js'); }

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{ "routing": { "routes": { "/": { "prefix": false } }, "index": "/index.html" } } ngsw-manifest.json

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Bootstrap App shell Service worker Notiﬁcations

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self.addEventListener('push', function(e) { e.waitUntil( fetch('http://localhost:8090/pushdata').then(function(response) { return response.json(); }).then(function(data) { return self.registration.showNotification(title, { body: body, icon: icon, tag: tag }); }, function(err) { err(err); }) ); }); worker-push.js