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FOUC, and the Death of Progressive Enhancement Kyle Simpson @getify

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In the beginning...

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First webpage (CERN) First web browser Early web browser

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Dark Mode Disable Progressive Rendering Preload Images ✓ Refresh ✓ Reduce Motion ✓ ✓

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Change How We Build

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Hover Me! Early Web

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Hover Me! #hover-me { background-color: #f00; color: #fff; } var btn = document.getElementById("hover-me"); btn.addEventListener("mouseover",openMenu); btn.addEventListener("mouseout",closeMenu); Separation of Concerns

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Graceful Degradation

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Graceful Degradation? https://www.slideshare.net/AaronGustafson/progressive-enhancement-mobile/57-SPECIAL_NEEDS_CAN_BE_CONTEXTUAL

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Progressive Enhancement

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http://hesketh.com/publications/ inclusive_web_design_for_the_future/

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Web Performance

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FOUC Flash of Uncolored Character Flash of Unstyled Content

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FOIT FOUT https://font-display.glitch.me/

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FUBC Flash of Unbehaviored Content FUBC

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First Paint WebPageTest.org

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Like?

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Reflows and restyles? Placeholders
 and spinners?

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Tolerate.

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The Great Lie: Technology-layered delivery (HTML -> CSS -> JS) is "morally" superior

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Mirror, Mirror, on the wall...

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Responsive
 Design Ethan Marcotte ( @beep )

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Divide in the Web Community https://css-tricks.com/the-great-divide/

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"Progressive Enhancement is Dead" --Tom Dale https://tomdale.net/2013/09/progressive-enhancement-is-dead/

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Is "No JavaScript" a relevant use case today?

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Fight for the user?

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Priority of Constituencies https://www.w3.org/TR/html-design-principles/#priority-of-constituencies "In case of conflict, consider users over authors over implementors over specifiers over theoretical purity..."

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Adaptation

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User Agent User Advocate User Agent

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Configuration

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Product + UI + UX =
 Imprintable Design #ImprintableDesign

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Progressive Enhancement: developers & technology Instead, we need design focused primarily on each person #ImprintableDesign

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Flawed: designing for consistency

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Flawed: if the device can do it, the user wants it https://webkit.org/blog/8970/how-web-content-can-affect-power-usage/

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Who's using your site?

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Google Analytics

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Statistics Marginalize People

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Common Thread: we know better than any user does

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E12Y higher bar: Empower People (empowerability) #ImprintableDesign #E12Y

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Customer Customer User User Person

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Flawed:
 browser knows best

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Power unlimited? Data unlimited? Hands usable? Lighting conditions? CPU/Memory available?

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Can we just ASK the person?

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Pick Your
 Font Size https://www.w3.org/TR/WCAG20-TECHS/G178.html

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Flawed: people always want the most powerful experience

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Need a new term: Progressive Enhancement Progressive Experience Personalized Experience People Empathy

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How do we begin practicing People Empathy through Imprintable Design?

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People must be given more control over their web experiences

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Precedent

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"Currencies" Speed Battery Level Cost (Bandwidth)

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Person and Browser together

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Fidelity
 Slider

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"Request-Fidelity" Header

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Layers of technology Degrees of fidelity Sites/Apps built in...

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Send or Skip WebGL, animations, fonts, retina images, etc Features / Components

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Alter Behavior Batching requests Switching on/off SPA Treat like offline app

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Browser (User Advocate) must veto server over resource responses

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First Steps?

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Should we wait on browsers to adopt? No.

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Start building in options. Start exposing choices.

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Objections?

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"[N]o one has disproved the benefits of Progressive Enhancement or proposed a better technique." https://www.sitepoint.com/javascript-dependency- backlash-myth-busting-progressive-enhancement/

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Progressive Enhancement is dead.
 
 Long live People Empathy and #ImprintableDesign.