Bulletproof Ajax

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Amedia 2007 Europe, London june 7th-8th

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Bulletproof Ajax

  1. 1. Bulletproof Ajax
  2. 2. Bulletproof progressive enhancement
  3. 3. behaviour JavaScript presentation CSS structureHTML content
  4. 4. <p> This is the introduction </p> <p style=quot;font-weight:boldquot;> This is the introduction </p> <p class=quot;introquot;> This is the introduction </p> .intro { font-weight:bold; }
  5. 5. <a href=quot;help.htmlquot;> Need help? </a> <a href=quot;help.htmlquot; onclick=quot;window.open (this.href); return false;quot;> Need help? </a> <a href=quot;help.htmlquot; class=quot;helpquot;> Need help? </a>
  6. 6. window.onload = function() { // get links with class help // loop through links link.onclick = function(){ window.open(this.href); return false; }; };
  7. 7. beware <a href=quot;javascript:...quot;> <a href=quot;#quot; onclick= quot;...quot;>
  8. 8. communicating with the server without refreshing the whole page. Ajax
  9. 9. communicating with the server without refreshing frames the whole page. iframe Flash XMLHttpRequest
  10. 10. Microsoft IE5 Mozilla Safari Opera W3C XMLHttpRequest
  11. 11. send responseText open status browser XHR server XMLHttpRequest
  12. 12. speed
  13. 13. thin client
  14. 14. thin client browser server displaying data processing
  15. 15. fat client
  16. 16. fat client browser XHR server displaying data processing
  17. 17. dumb waiter
  18. 18. progressive enhancement using XMLHttpRequest
  19. 19. progressive enhancement Hijax
  20. 20. browser server displaying data processing
  21. 21. deceptively fat client browser XHR server displaying data processing
  22. 22. { navigation search main content browser server on form log shopping cart footer
  23. 23. navigation search main content browser XHR log on form shopping cart footer
  24. 24. paradox? plan for Ajax from the start implement Ajax at the end
  25. 25. pattern recognition add a comment log on add to cart rate this search results? pagination?
  26. 26. documents applications
  27. 27. design challenges
  28. 28. WTF? what is happening? what just happened?
  29. 29. beyond the browser the back button bookmarking
  30. 30. user testing
  31. 31. Accessibility Just Ain’t eXciting
  32. 32. “Unless a way can be found to notify screen readers of updated content, Ajax techniques cannot be considered accessible.”
  33. 33. “This Ajax application is usable by screen- reader users some of the time. They aren’t totally shut out, but it isn’t totally easy for them, either.”
  34. 34. “The power of the Web is in its universality. Access by everyone regardless of disability is an essential aspect.”
  35. 35. k thx bai adactio.com http://flickr.com/photos/flydown/42047131/ http://flickr.com/photos/bizzygirl/291918549/ http://flickr.com/photos/benchan/150094224/ http://flickr.com/photos/rogerjones/121736518/ http://flickr.com/photos/chuckbiscuito/161971512/
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