PWA Audit: Build Progressive Web Apps That Users Love

Learn how to create installable, offline-capable Progressive Web Apps.

PWA Audit: Build Progressive Web Apps That Users Love

What is a Progressive Web App?

A Progressive Web App (PWA) is a website that uses modern web capabilities to deliver app-like experiences. PWAs are installable, work offline, and can send push notifications.

PWA Benefits

  • Installable: Add to home screen
  • Offline support: Works without internet
  • Fast: Cached resources load instantly
  • Engaging: Push notifications
  • No app store: Direct distribution

    • Core PWA Requirements

    1. HTTPS

    PWAs must be served over secure connections.

    2. Web App Manifest

    JSON file describing your app:

    ``json

    {

    "name": "My App",

    "short_name": "App",

    "start_url": "/",

    "display": "standalone",

    "background_color": "#ffffff",

    "theme_color": "#000000",

    "icons": [

    {

    "src": "/icon-192.webp",

    "sizes": "192x192",

    "type": "image/png"

    }

    ]

    }

    `

    3. Service Worker

    JavaScript file enabling offline functionality:

    `javascript

    self.addEventListener('fetch', event => {

    event.respondWith(

    caches.match(event.request)

    .then(response => response || fetch(event.request))

    );

    });

    ``

    What We Audit

    Installability

  • Valid manifest
  • Service worker registered
  • HTTPS enabled
  • Proper icons

    • Offline Support

  • Cache strategy
  • Offline fallback page
  • Network error handling

    • Performance

  • Fast first load
  • Smooth interactions
  • Efficient caching

    • Audit your PWA with our free Progressive Web App checker.