aka.ms/mobile-era
Chris Heilmann @codepo8
PWA is
too much to ask
and that’s OK
aka.ms/whats-a-pwa
development approach
web content to be app-like
experiences
Progressive
opportunity
clean up and speed up current
web based projects
reconsider what
we call apps
doesn’t work
https://demo.vaadin.com/expense-manager
• Link as simple distribution model
• Simple, atomic updates
• Flexible layout options (grids,
flexbox, media queries, vw, vh)
• Small data footprint, loading on
demand and environment
• Reusability of code – conversion
to other form factors
• Offline capabilities by design
• Full access to hardware
• Authenticated, verified device
access
• High trust distribution model
• Easy payments
• Bleeding edge tech (as a
competitive advantage)
NativeWeb
POSITIVES
• Verification and authentication is
hard
• Patchy access to hardware
• Huge fragmentation of devices
and displays
• Patchy trust in capabilities
• Payments are not easy or
expected
NativeWeb
• Huge data footprint with non-
atomic updates
• Slow update cycles because of
negotiation overhead
• High expectations and breakneck
competition (price race to bottom)
• Bespoke development for each
platform with only minor re-use
NEGATIVES
needs to be served
from a secure origin
needs to have an app
manifest
just another
resource
index and ingest
Store & Bing
ServiceWorker
Act as proxy servers that sit
between web apps, the browser,
and the network.
Define the rules what should be
cached and loaded from where –
no more hoping the browser
caches your work.
Intercept network requests and
define what happens. Serve from
cache, refresh, convert before
display, etc….
Refresh your app in the
background, pull new content
and notify the user with push
notifications that something new
is available.
aka.ms/serviceworkers
aka.ms/workbox
aka.ms/pwa-builder
aka.ms/pwa-builder
aka.ms/google-lighthouse
aka.ms/webcando
aka.ms/pwa-directory
aka.ms/pwa-stats
“try before you buy”
do what they
came for
change their device
where they are
new users will
enjoy your products
brings the best of the web
• Link as simple distribution model
• Simple, atomic updates
• Flexible layout options (grids,
flexbox, media queries, vw, vh)
• Small data footprint, loading on
demand and environment
• Reusability of code – conversion
to other form factors
• Offline capabilities by design
• Full access to hardware
• Authenticated, verified device
access
• High trust distribution model
• Easy payments
• Bleeding edge tech (as a
competitive advantage)
NativeWeb
POSITIVES
• Verification and authentication is
hard
• Patchy access to hardware
• Huge fragmentation of devices
and displays
• Patchy trust in capabilities
• Payments are not easy or
expected
NativeWeb
• Huge data footprint with non-
atomic updates
• Slow update cycles because of
negotiation overhead
• High expectations and breakneck
competition (price race to bottom)
• Bespoke development for each
platform with only minor re-use
NEGATIVES
Thank you.
Now show me what you got!
aka.ms/mobile-era

Progressive Web Apps - Covering the best of both worlds