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Avatar for Derek Johnson Derek Johnson
October 09, 2014
Technology
190
2

Responsive images have landed

An introduction to responsive images standards: , @srcset and @sizes.

Avatar for Derek Johnson

Derek Johnson

October 09, 2014

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Transcript

  1. Responsive images ! Derek Johnson

  2. <img src alt>

  3. None
  4. None

  5. • Resolution switching • Viewport based • Pixel density •

    Art direction • Design breakpoints • Media types • Relative units • Image formats • User control of source

  6. <img src alt srcset>

  7. srcset= “cat.jpg 1x, cat2.jpg 2x”

  8. None
  9. None
  10. None

  11. srcset= “cat.jpg 300w, cat2.jpg 600w”

  12. None
  13. None
  14. None
  15. None
  16. None
  17. None
  18. None

  19. srcset= “cat.jpg 300w, cat2.jpg 600w” sizes= “(min-width:50em) 30vw, (min-width:20em) 50vw,

    100vw”
  20. None
  21. None
  22. None
  23. None
  24. None
  25. None
  26. None

  27. <picture> <source srcset media> <source srcset media> <img src alt>

    </picture>

  28. <picture> <source srcset type> <source srcset type> <img src alt>

    </picture>

  29. <picture> <source srcset="images/asio-otus-300.webp 300w, images/asio-otus-400.webp 400w, images/asio-otus-600.webp 600w, images/asio-otus-800.webp 800w"

    sizes="(min-width:78.947em) 18.75em, (min-width:74em) 23.75vw, (min-width:60em) 31.6666667vw, (min-width:38em) 47.5vw, 95vw" type="image/webp"> <source srcset="images/asio-otus-300.jpg 300w, images/asio-otus-400.jpg 400w, images/asio-otus-600.jpg 600w, images/asio-otus-800.jpg 800w" sizes="(min-width:78.947em) 18.75em, (min-width:74em) 23.75vw, (min-width:60em) 31.6666667vw, (min-width:38em) 47.5vw, 95vw" type="image/jpeg"> <img src="images/asio-otus-300.jpg" alt="Long eared owl"> </picture>

  30. browser support

  31. polyfill

  32. None