Electron, Cordova & PWA - was, wann, wie & warum?

Electron, Cordova & PWA - was, wann, wie & warum?

Write once, run anywhere – dieser alte Java-Traum ist dank Webtechnologien längst Realität geworden. Neuerdings haben Cross-Platform-Entwickler aber die Wahl zwischen altbewährten Ansätzen wie Apache Cordova und GitHub Electron, bei denen Web-Apps in native Container verpackt werden, und den neuen Progressive Web Apps (PWA), bei denen eine Webanwendung aus dem Browser heraus installiert wird. Optisch geben sich beide Methoden nicht viel, doch sie unterscheiden sich hinsichtlich der Verteilung und im Funktionsumfang.

PWA-Professional Christian Liebel erklärt Ihnen, für welche Anwendungsfälle sich PWAs eignen und wann Sie ergänzend oder alternativ zu Electron oder Cordova greifen sollten.

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Christian Liebel

July 22, 2020
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  1. Electron, Cordova, PWA Was, wann, wie und warum Christian Liebel

    @christianliebel Consultant
  2. Hello, it’s me. Electron, Cordova, PWA Was, wann, wie und

    warum Christian Liebel Twitter: @christianliebel Email: christian.liebel @thinktecture.com Angular & PWA Slides: thinktecture.com /christian-liebel
  3. Intro Progressive Web Apps Electron Cordova Summary Electron, Cordova, PWA

    Was, wann, wie und warum
  4. Electron, Cordova, PWA Was, wann, wie und warum BASTA! Spring

    2013 »Cross-platform and cross- device development will become the norm in the next few years.« Christian Weyer
  5. In 2020, the cross-platform story still works out – and

    it’s better than ever! Electron, Cordova, PWA Was, wann, wie und warum Today One team One codebase Maximum reach
  6. Electron, Cordova, PWA Was, wann, wie und warum

  7. Intro Progressive Web Apps Electron Cordova Summary Electron, Cordova, PWA

    Was, wann, wie und warum
  8. Electron, Cordova, PWA Was, wann, wie und warum Responsive Linkable

    Discoverable Installable App-like Connectivity Independent Fresh Safe Re-engageable Progressive
  9. Cheat Sheet Electron, Cordova, PWA Was, wann, wie und warum

    Progressive Web Apps
  10. Architecture Overview & Deployment Electron, Cordova, PWA Was, wann, wie

    und warum Progressive Web Apps Browser Internet Single-Page Application Cache fetch JS HTML CSS Server Service Worker
  11. Install Experience Electron, Cordova, PWA Was, wann, wie und warum

    Progressive Web Apps
  12. Web Native Web App Gap Electron, Cordova, PWA Was, wann,

    wie und warum Progressive Web Apps Web App Gap
  13. Project Fugu Electron, Cordova, PWA Was, wann, wie und warum

    Progressive Web Apps »Let’s bring the web back – API by API« Thomas Steiner, Google
  14. Project Fugu Electron, Cordova, PWA Was, wann, wie und warum

    Progressive Web Apps Contacts Picker Screen Wake Lock API Picture in picture Native File System API
  15. Fugu Example: Native File System API if ('chooseFileSystemEntries' in window)

    { const handle = await window.chooseFileSystemEntries(); const file = await handle.getFile(); // do something with the file } else { // use fallback API or disable feature in app } Electron, Cordova, PWA Was, wann, wie und warum Progressive Web Apps Feature Detection Browser takes care of calling OS-level APIs
  16. Browser Cross-Platform Web APIs Electron, Cordova, PWA Was, wann, wie

    und warum Progressive Web Apps window.chooseFileSystemEntries(); Intent.ACTION_GET_CONTENT IFileDialog … NSOpenPanel
  17. https://paint.js.org Electron, Cordova, PWA Was, wann, wie und warum LIVE

    DEMO
  18. Store Deployments (Simplified) Electron, Cordova, PWA Was, wann, wie und

    warum Progressive Web Apps https://example.com .appx .apk Server Microsoft Store Play Store Source Files
  19. Advantages - One single codebase, maximum reach - No app

    store, installation, third-party software, … required - No app store approvals required - Super easy deployment (SFTP is enough, no redeployment via MSI, …) - Latest app version is always available - App Store support for Microsoft Store, Google Play Store (Trusted Web Activity, TWA), Samsung Galaxy Store (currently US only) - Fully backwards compatible Electron, Cordova, PWA Was, wann, wie und warum Progressive Web Apps
  20. Disadvantages - No Apple App Store support (uploading PWAs is

    discouraged) - Web App Gap - not all native APIs are available on the web platform - expected to get smaller thanks to Project Fugu - not all web APIs are available in every browser - No control over execution environment - Requires an up-to-date browser If that’s an issue, web apps are still an option! Electron, Cordova, PWA Was, wann, wie und warum Progressive Web Apps
  21. Deployment Electron, Cordova, PWA Was, wann, wie und warum Electron/Cordova

    JS HTML CSS .ipa .exe .app ELF .apk .appx Single-Page Application Cordova Electron
  22. Intro Progressive Web Apps Electron Cordova Summary Electron, Cordova, PWA

    Was, wann, wie und warum
  23. Electron, Cordova, PWA Was, wann, wie und warum

  24. Electron, Cordova, PWA Was, wann, wie und warum Electron Architecture

    Desktop OS Electron Renderer Process (Chromium) Electron Main Process (Node.js) macOS Windows Linux Single-Page Application Electron API Custom Node.js Modules IPC Remote Node.js Electron- App
  25. Advantages - Many desktop target platforms - Windows 7+, macOS

    10.10+, Ubuntu, Debian, Fedora - macOS App Store, Microsoft Store, Snapcraft - Access to all native APIs - Well-defined runtime environment (Chromium and Node.js) - Integration scenarios with native applications Electron, Cordova, PWA Was, wann, wie und warum Electron
  26. Disadvantages - Wrapper is large in size (“hello world” starts

    with ~100 MB) - Outdated Node.js & Chromium versions may pose security risks to users – developers have to take care of regular updates of the wrapper - Each Electron instance leads to RAM overhead (e.g. Slack) Electron, Cordova, PWA Was, wann, wie und warum Electron
  27. Intro Progressive Web Apps Electron Cordova Summary Electron, Cordova, PWA

    Was, wann, wie und warum
  28. Electron, Cordova, PWA Was, wann, wie und warum https://appfigures.com/top-sdks/development/all

  29. Electron, Cordova, PWA Was, wann, wie und warum Cordova Architecture

    Cordova Application Single-Page Application HTML JS CSS Assets Cordova Plugins Geolocation Notifications Media Camera Custom Plugins HTML Rendering Engine (WebView) Cordova Native APIs Cordova APIs HTML APIs Mobile OS Android iOS Windows 10 UWP and more… OS APIs OS APIs
  30. Alternative: Capacitor – Provided by Ionic – Different Workflow: native

    projects are source assets instead of build assets – Backwards-compatible with Cordova (and many of its plug-ins) Electron, Cordova, PWA Was, wann, wie und warum Cordova
  31. Advantages - Supports app development for iOS, Android, macOS, UWP

    (+ Electron, Web) - Access to all native APIs - Official App Store deployments Electron, Cordova, PWA Was, wann, wie und warum Cordova
  32. Disadvantages - Plug-ins are often outdated - Cordova’s web and

    Electron platforms are inconvenient to use - Dependent on guidelines and goodwill of platform provider - App/update validation can take several hours or days Electron, Cordova, PWA Was, wann, wie und warum Cordova
  33. Electron, Cordova, PWA Was, wann, wie und warum https://medium.com/quark-works/why-our-app-got-removed-from-the-google-play-store-how-we-fixed-it-4c8d430eafa0 https://www.nytimes.com/interactive/2019/09/09/technology/apple-app-store-competition.html

    https://www.theverge.com/2019/1/30/18203551/apple-facebook-blocked-internal-ios-apps
  34. Intro Progressive Web Apps Electron Cordova Summary Electron, Cordova, PWA

    Was, wann, wie und warum
  35. Electron, Cordova, PWA Was, wann, wie und warum Target Platforms

    PROGRESSIVE WEB APPS CORDOVA ELECTRON + cars, smart fridges, …
  36. - Developers should aim for Progressive Web Apps - If

    required, web apps can be (additionally) wrapped in a Cordova or Electron container à your web app investment always pays off! - Consider Cordova and Electron as “uber-polyfills” that might become increasingly irrelevant in the future - Feature-detect modern web APIs and use them, fall back to Electron/Cordova APIs or alternatives if unavailable - Report your use cases and missing web capabilities to browser vendors Electron, Cordova, PWA Was, wann, wie und warum Recap
  37. Thank you for your kind attention! Christian Liebel @christianliebel christian.liebel@thinktecture.com