The document discusses the essentials of building web interfaces, emphasizing the importance of understanding various technologies like HTML, CSS, and JavaScript to create effective web products. It stresses the need for developers to consider user-related factors and learn from past mistakes to improve web design. The document also highlights tools and libraries provided by Yahoo! for enhancing web development, as well as an example of using RSS feeds to gather content from external sources like SlideShare.

1. Building Web Hack Interfaces Christian Heilmann UEL Hack Day London, UK, October 2007

2. Building web interfaces is a fun task.

3. The technologies involved are easy to learn.

4. Text + Images + Multimedia = Content “ What is it about”

5. HTML = Structure “ What is what”

6. CSS + Background images = Look and Feel “ How should it be displayed”

7. Scripting and Extensions = Behaviour “ How should it behave and react?”

8. Playing each of these to their respective strengths = great web products.

9. There is one thing to consider though.

10. Browser Operating System Screen Size Screen Resolution Browser Size Plugins and configurations Input Device Reading Level Vision Level of Understanding Motor accuracy

11. Browser Operating System Screen Size Screen Resolution Browser Size Plugins and configurations Input Device Reading Level Vision Level of Understanding Motor accuracy UNKNOWN

12. Keeping this in mind makes you a true developer for the web.

13. Be paranoid. Expect the failure.

14. Yahoo! has to do that day-in day-out.

15. People trust us with their data and use our products to connect with other people.

16. This is why we hire great developers.

17. This is also why we use their knowledge to make things easier for all.

18. Instead of constantly re-inventing we spy good solutions and learn from mistakes.

19. The outcome of this research is available to you!

20. http://developer.yahoo.com

21. Learn about: Design Patterns Performance Security

22. Tap into the collective wisdom:

25. The Yahoo! User Interface Library

26. CSS Framework JavaScript Library Widget Framework Debugging Utility

27. CSS Components: CSS Reset CSS Fonts CSS Grids Making CSS layouts predictable and working across browsers and operating systems =

28. JavaScript Components: DOM Event Connection Animation Making JavaScript development less random across browsers and easier to concentrate on the architecture of your scripts. =

29. Widgets: Panel Dialog Autocomplete DataTable Slider Menu Calendar Colorpicker Tabview Rich Text Editor Creating HTML/CSS/JS based RIAs with tested and fully skinnable components. =

30. Debugging YUI Logger is a cross-browser, cross-platform debugging console. YUITest is a unit and component testing framework in JavaScript

31. Industrial Strength for everyday solutions

32. Comes with full documentation, examples, cheatsheets and quick start guides. http://developer.yahoo.com/yui/docs

33. Others already benefit:

34. http://tech.groups.yahoo.com/group/ydn-javascript/links/YUI_Implementations_001149002597/

35. http://tech.groups.yahoo.com/group/ydn-javascript/links/YUI_Implementations_001149002597/ Newsvine, Opera, O’Reilly, Dow Jones Index, Paypal, Slashdot, Digg, SugarCRM, VersionTracker,iFilm, vBulletin, ebay

36. We also like to tell people about cool YUI stuff.

37. http://yuiblog.com

38. Play with our APIs and Feeds.

39. Answers Local Mail Maps Search Shopping Travel del.icio.us Flickr™ MyBlogLog Pipes Upcoming Webjay Finance HotJobs Traffic Weather

40. Get SDKs to play with our applications: Messenger Music Search Widgets

41. What if there is some data you want to access but no API to get it in the right format?

42. http://pipes.yahoo.com

45. … or hack what is out there.

46. Example: slideshare.net

47. Slideshare is a place to share presentations.

48. You can embed the presentations into other web products.

50. There is an API, but there is no way to get all your latest presentations to have a “slide portfolio”.

51. However, there is an RSS feed with all the data I need!

53. Battle plan: Retrieve feed Display links to slides Get the slide movies Write some script to show the movies when the links are clicked

54. <?php $url = 'http://www.slideshare.net/rss/user/cheilmann'; $ch = curl_init(); curl_setopt($ch, CURLOPT_URL, $url); curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); $slides = curl_exec($ch); curl_close($ch); $slides = str_replace('slideshare:embed','slideshareembed',$slides); $slides = str_replace('media:title','mediatitle',$slides); $xml = domxml_xmltree($slides); $json = array(); $slidesharelist = ''; $links = $xml->get_elements_by_tagname('link'); $img = $xml->get_elements_by_tagname('url'); $titles = $xml->get_elements_by_tagname('mediatitle'); $embeds = $xml->get_elements_by_tagname('slideshareembed'); foreach ($embeds as $key=>$el) { $l = $links[$key+1]->children[0]->content; $t = $titles[$key]->children[0]->content; $slidesharelist .= '<li><a href=&quot;'.$l.'&quot;>'.$t.'</a></li>'; $emb = $el->children[0]->content; if(strpos($emb,'<div')===false){$emb = $el->children[1]->content;} preg_match_all('/value=&quot;([^&quot;]+)&quot;/msi',$emb,$obj); $json[]='\''.$obj[1][0].'\''; } ?>

55. <style type=&quot;text/css&quot;> @import 'slideshareshowstyles.css'; #slideshareshowslideshow{background:url(<?php echo $img[0]->children[0]->content;?>) no-repeat center center;} </style> <div id=&quot;slideshareshow&quot;> <ul id=&quot;slideshareslides&quot;><?php echo $slidesharelist; ?></ul> </div> <script type=&quot;text/javascript&quot; src=&quot;http://yui.yahooapis.com/2.3.1/build/yahoo-dom-event/yahoo-dom-event.js&quot;></script> <script type=&quot;text/javascript&quot; src=&quot;swfobject.js&quot;></script>

56. < script type=&quot;text/javascript&quot;> YAHOO.example.slideshareshow = function(){ var container = document.getElementById('slideshareshow'); YAHOO.util.Dom.addClass(container,'jsenabled'); var list = document.getElementById('slideshareslides'); var links = list.getElementsByTagName('a'); var displayContainer = document.createElement('div'); displayContainer.id = 'slideshareshowslideshow'; container.appendChild(displayContainer); var current = null; for(var i=0;links[i];i++){ YAHOO.util.Event.on(links[i],'click',show,i); } function show(e,i){ YAHOO.util.Dom.removeClass(current,'current'); current = this; displayContainer.innerHTML = ''; var so = new SWFObject(slides[i], &quot;slideshareshow&quot;, &quot;425&quot;, &quot;355&quot;, &quot;8&quot;, &quot;#ffffff&quot;); so.addParam(&quot;allowScriptAccess&quot;, &quot;always&quot;); so.addParam(&quot;allowFullScreen&quot;, &quot;true&quot;); so.write(displayContainer); YAHOO.util.Dom.addClass(current,'current'); YAHOO.util.Event.stopEvent(e); } var slides=[<?php echo implode($json,','); ?>]; }(); </script>

57. http://www.wait-till-i.com/index.php?p=500

58. This is awesome! We are building badges for people to be able to display lists of their recent slideshows on their site, but it did not integrate the player. I love what you have done – well designed and well executed. I want it for my own site now. I will post about it to our blog. And we will point to it when we release our own badges. Thanks! rashmi (SlideShare cofounder)

59. Anything else?

60. per aspera ad astra &quot;through adversity to the stars&quot; or &quot;a rough road leads to the stars&quot;

61. per aspera ad astra

62. http:// developer.yahoo.com /flash/

63. Get Flashing and Flexing

64. Christian Heilmann http://wait-till-i.com http://icant.co.uk Thank you! http://creativecommons.org/licenses/by-sa/3.0/