Digital Visions 2013 - The perfect Steak

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Griass enk!

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The perfect Steak Digital Visions 2013

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Lafers grill recipes The need precise control I need to put meat on fire

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Weber-Kit

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Controlled Environments

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Controllable Environments

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Uncontrollable Environments

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... to be honest ... only few of them come with their own engine

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Under the top-most used browsers on iOS and Android

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Fragmentation

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iOS screen fragmentation

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Android screen fragmentation

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Holy fragmentation, Batman This is friggin' scary

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And that is just Android ...

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Viewport is one thing... Features? Implementation quality? Memory? Resolution? Browser Speed? Connection speed?

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You can't control everything

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Parallax Scrolling?

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moto.oakley.com 1. 85.4 MB page weight 2. 471 HTTP Requests 3. 2 minutes 45 seconds until loading screen replaced with content 4. 4 minutes 10 seconds to wait for onLoad event

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There sure is a mobile version? ... oh yeah, there is...

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85.9 MB

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Costs Roaming in Switzerland for EU clients is 1€ per MB

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Costs vodafone UK charges 1£ per 25 MB

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Assumptions Features: Scrolling Implementation quality: Tried, trusted and Robust Browser Speed: iPad-near JS execution time Memory: A shitload Resolution: Of course Retina! Connection speed: Harddrive

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Features

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overflow: scroll

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-webkit-overflow-scrolling: touch

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Feature detection Test for overflow-scrolling, otherwise use iScroll

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var has3d = 'WebKitCSSMatrix' in window && 'm11' in new WebKitCSSMatrix()

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The good: We did feature detects, and polyfilled in case

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The bad: We assumed iScroll will fix all our problems iScroll assumed hardware acceleration is a good idea overall

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The ugly: We broke IE10 on Windows Phone 8

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When using skrollr on mobile you don't actually scroll. When detecting a mobile browser skrollr disables native scrolling and instead listens for touch events and moves the content

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A classic $('a').on('click', function()) { window.location.href = $(this).attr('href'); }

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Implementation qualitiy

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-webkit-something: something

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meta-Viewport

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meta-Viewport

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... not that it does anything ...

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@media(max-width: 320px) { @ms-viewport { width: 320px } }

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@-ms-viewport { width: device-width; }

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Browser speed

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Truth is ... JavaScript takes long to execute

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$('.item.' + filterCriteria).each(function() { $(this).hide(); });

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$('.filterArea').addClass('.filterCritera'); .filterCritera hasCritera { display: none; }

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Where is JavaScript necessary?

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Lanyrd

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Lanyrd User Agent Detection ... done right! Got a slow JS engine? Don't get any JS.

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Instagram on iOS5 2/13 - 7/13

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Browsers other than Chrome don't priorize JS over IMG assets They take everything in order, to ensure nothing is missing on execution

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Use JavaScript to load content that's only available with JavaScript

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13s > 1.4s

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sighjavascript.tumblr.com

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Memory Resolution

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SVG

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Connection speed

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A though one ... but rule of thumb is to reduce requests Load content that is necessary for the first impression

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RESS Responsive & Server-Side

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if ($(document).width() > 640) { $.get('path/to/html', function(data){ $('[role="complementary"]').append(data); }); }

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Single Pager? Embed CSS and Scripts inline Use sprites and fonts Beware of base64 asset embedding

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Solutions Features: Use, when certain that it's there! Implementation quality: Modern features should be an add-on Browser Speed: Less JavaScript dependent content Memory: Optimize Images, reduce Image Footprint Resolution: See above, use SVG, use Responsive Images! Connection speed: Fear for worst, reduce requests!

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Solutions Features: Progressive Enhancement Implementation quality: Progressive Enhancement Browser Speed: Progressive Enhancement Memory: Progressive Enhancement Resolution: Progressive Enhancement Connection speed: Progressive Enhancement

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Embrace Progressive Enhancement

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Progressive Enhancement Take care of your content - Provide a solid HTML base Present your content - Add robust and future friendly CSS Enhance behaviour by adding JavaScript

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Help yourself with tooling

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Detect Code Smells

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HTML Code Smells DiagnostiCSS Revenge.css Troll.css

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Grunt Task Runner Automaticall create PNG fallbacks (Grunticon) Insert debug CSS files during development Minify, compile, reduce sources Execute ImageOptim and SVGO ...