Upgrade to Pro — share decks privately, control downloads, hide ads and more …
Sign up for free

Responsive Images using <picture> and srcset/sizes

Sponsored · Ship Features Fearlessly Turn features on and off without deploys. Used by thousands of Ruby developers. →
Avatar for Matt Steele Matt Steele
July 02, 2014
Programming
1.5k
1

Responsive Images using <picture> and srcset/sizes

Avatar for Matt Steele

Matt Steele

July 02, 2014

More Decks by Matt Steele

See All by Matt Steele
Upgrading to Angular 2 using ngUpgrade
Avatar for Matt Steele mattdsteele
0
1.2k
Reactive Programming with RxJS
Avatar for Matt Steele mattdsteele
0
130
GET TO THE CHOPVAR
Avatar for Matt Steele mattdsteele
0
210
Using Source Maps in 2015
Avatar for Matt Steele mattdsteele
0
1.1k
The Decorator Pattern
Avatar for Matt Steele mattdsteele
0
96
Diving Into the Device API
Avatar for Matt Steele mattdsteele
1
940
Unit Testing JavaScript when you're Afraid of JavaScript
Avatar for Matt Steele mattdsteele
3
910
What Zelda Taught Me about Front End Engineering
Avatar for Matt Steele mattdsteele
5
1.3k

Other Decks in Programming

See All in Programming
R8 の設定見直しでアプリサイズ削減
Avatar for ANDPAD inc andpad
0
240
作れる、でも消せるか？──安全に「枯らして消す」機能削除術 / Drain, Then Delete
Avatar for chobishiba chobishiba
3
1.3k
Vue.jsで作る空間解析アプリとCapacitorプラグインのData Bridge
Avatar for Hal hal_spidernight
1
130
FactoryBotをやめればRSpecは速くなるのか？
Avatar for nissyi yuta_onishi_97
0
1.2k
あなたの await、OS まで届いてる？ strace で覗く JavaScript の非同期
Avatar for hasuto sasaki hasutosasaki
1
1.7k
AI時代のFlutter品質設計 — アプリ品質を守るQuality Layers
Avatar for omatty198 omatty198
0
320
自作Discord音声botをLambda MicroVMsに移行した話 / Migrating My Discord Voice Bot to Lambda MicroVMs
Avatar for アキキー | Akihisa Ikeda akihisaikeda
0
190
Web Framework Benchmark Battle 2026, Any%
Avatar for Akira Matsuda a_matsuda
3
3.1k
[Dev Group Paris Octobre 26] Agentforce, SIforce, Claudeforce, Slackbot… on s'y retrouve ?
Avatar for Nathan Abondance nabondance
0
120
SODA - FACT BOOK（JP）
Avatar for SODA inc. sodainc
1
40k
作って学ぶSpring BootのAuto Configuration / JJUG Night Seminar 2026-10-19
Avatar for Ryo Shindo rshindo
0
210
[JA] Domain Modeling with Vanilla Rails: 「操作」から再考するRailsの設計論
Avatar for Yuichi Goto yasaichi
4
1.5k

Featured

See All Featured
Designing Experiences People Love
Avatar for Jonathan Moore moore
143
24k
Data-driven link building: lessons from a $708K investment (BrightonSEO talk)
Avatar for Szymon Słowik szymonslowik
1
1.4k
Become a Pro
Avatar for Speaker Deck speakerdeck
PRO
31
6.3k
Navigating Team Friction
Avatar for Lara Hogan lara
192
16k
The Hidden Cost of Media on the Web [PixelPalooza 2025]
Avatar for Tammy Everts tammyeverts
2
550
コードの90%をAIが書く世界で何が待っているのか / What awaits us in a world where 90% of the code is written by AI
Avatar for r-kagaya rkaga
63
47k
The Spectacular Lies of Maps
Avatar for Per Axbom axbom
PRO
1
1.1k
Design and Strategy: How to Deal with People Who Don’t "Get" Design
Avatar for Morgane Peng morganepeng
133
20k
How to build an LLM SEO readiness audit: a practical framework
Avatar for Nick Samuel nmsamuel
2
960
The Curious Case for Waylosing
Avatar for Cassini Nazir cassininazir
1
590
First, design no harm
Avatar for Per Axbom axbom
PRO
2
1.4k
GitHub's CSS Performance
Avatar for Jon Rohan jonrohan
1033
470k

Transcript

  1. Responsive Images @mattdsteele

  2. THIS IS WHY YOU’RE FAT

  3. We’ve put on a little weight.

  4. http://httparchive.org/trends.php#bytesTotal&reqTotal

  5. http://httparchive.org/trends.php#bytesTotal&reqTotal Total Page Weight File Size (KB) 1400 1550 1700

    1850 July August September October NovemberDecember January February March April May June

  6. http://httparchive.org/trends.php#bytesTotal&reqTotal Total Page Weight File Size (KB) 1400 1550 1700

    1850 July August September October NovemberDecember January February March April May June 1485kb 1521kb 1551kb 1590kb 1614kb 1701kb 1681kb 1710kb 1728kb 1762kb 1775kb 1808kb

  7. http://httparchive.org/interesting.php Bytes Per Page by Content Type

  8. http://httparchive.org/interesting.php Images Bytes Per Page by Content Type

  9. http://httparchive.org/interesting.php HTML Other Flash Stylesheets Scripts Images Bytes Per Page

    by Content Type

  10. RETINA- POCALYPSE

  11. None

  12. iPhone 3GS

  13. 320x480 iPhone 3GS

  14. 320x480 iPhone 3GS iPhone 4

  15. 320x480 640x960 (2x) iPhone 3GS iPhone 4

  16. HTC One

  17. 1920x1080 (3x) HTC One

  18. “Let’s make it responsive!”

  19. Nexus 10

  20. 2560x1600 (2x) Nexus 10

  21. 2880x1800 (1.6x) MacBook Pro with Retina Display

  22. None
  23. None
  24. None

  25. 320x213 41kb

  26. 320x213 41kb

  27. 320x213 41kb 640x425 137kb

  28. None

  29. 1280x852 400kb

  30. 72% Responsive sites serve the same content to desktop &

    mobile http://www.guypo.com/uncategorized/real-world-rwd-performance-take-2/

  31. Ugh.

  32. Shortcut: <SVG>

  33. <img src="logo.svg">

  34. 9+ SVG

  35. Grunticon github.com/filamentgroup/grunticon

  36. "Vectors are for chumps. I need bitmaps."

  37. None

  38. <picture>

  39. <picture> <img src="fallback.png"> </picture>

  40. <picture> <source media="(min-width: 1000px)" srcset="large.png"> <source media="(min-width: 640px)" srcset="medium.png"> <img

    src="fallback.png"> </picture>

  41. <picture> <source media="(min-width: 1000px)" srcset="large.webp" type="image/webp"> <source media="(min-width: 1000px)" srcset="large.png">

    <source media="(min-width: 640px)" srcset="medium.png"> <img src="fallback.png"> </picture>
  42. None
  43. None
  44. None

  45. Art Direction

  46. <picture> 38 33 Under Consideration

  47. None
  48. None

  49. Screen Size ⊆ What You Need

  50. None

  51. Viewport Size

  52. Viewport Size Screen Density

  53. Viewport Size Rendered Size Screen Density

  54. Viewport Size Rendered Size Screen Density Image Dimensions

  55. Viewport Size Rendered Size Screen Density Image Dimensions Browser knows?

  56. Viewport Size Rendered Size Screen Density Image Dimensions Browser knows?

    ✓

  57. Viewport Size Rendered Size Screen Density Image Dimensions Browser knows?

    ✓ ✓

  58. Viewport Size Rendered Size Screen Density Image Dimensions Browser knows?

    ✓ ✓ ✗

  59. Viewport Size Rendered Size Screen Density Image Dimensions Browser knows?

    ✓ ✓ ✗ ✗

  60. Viewport Size Rendered Size Screen Density Image Dimensions

  61. Viewport Size Rendered Size Screen Density Image Dimensions Author knows?

  62. Viewport Size Rendered Size Screen Density Image Dimensions Author knows?

    ✗ ✗ ✓ ✓

  63. srcset & sizes

  64. Image dimensions srcset="large.jpg 1200w, medium.jpg 640w, small.jpg 320w"

  65. Image dimensions URL srcset="large.jpg 1200w, medium.jpg 640w, small.jpg 320w"

  66. Image dimensions Width URL srcset="large.jpg 1200w, medium.jpg 640w, small.jpg 320w"

  67. Rendered Size sizes="(min-width: 1024px) 300px, (min-width: 640px) 50vw, 100vw"

  68. Rendered Size For this MQ: sizes="(min-width: 1024px) 300px, (min-width: 640px)

    50vw, 100vw"

  69. Rendered Size For this MQ: Image renders this big sizes="(min-width:

    1024px) 300px, (min-width: 640px) 50vw, 100vw"

  70. Rendered Size For this MQ: Image renders this big Default

    sizes="(min-width: 1024px) 300px, (min-width: 640px) 50vw, 100vw"

  71. <img src="small.jpg" alt="A responsive image" srcset="large.jpg 1200w, medium.jpg 640w, small.jpg

    320w" sizes="(min-width: 1024px) 300px, (min-width: 640px) 50vw, 100vw">

  72. Screen Densities

  73. Configurable

  74. Configurable •HD Mode

  75. Configurable •HD Mode •Speed Mode

  76. Configurable •HD Mode •Speed Mode •Crappy Network Mode

  77. srcset 32 Under Consideration

  78. Fallbacks built-in

  79. Or: Picturefill http://scottjehl.github.io/picturefill/

  80. Go Forth And Get Skinny

  81. @mattdsteele flic.kr/p/7TH4dc