Javascript jQuery jQuery Ui

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Javascript jQuery jQuery Ui

  1. Javascript, jQuery and jQuery UI presentation by: Tom Friedhof
  2. Stuff I’ll cover today. • JavaScript. • The DOM (Document Object Model). • Adding Behaviors to HTML. • You don’t need to learn the DOM • jQuery • jQuery UI Tabs • jQuery the Drupal Way
  3. What is JavaScript?
  4. What is JavaScript? • Client Side Scripting Language • JavaScript is not Java • Used to provide instant feedback • Better Usability • Richer Web Applications • Works the DOM (i.e. HTML, XML, etc...)
  5. What is the DOM? The Document Object Model (DOM) is an API for HTML and XML documents. It provides a structural representation of the document, enabling you to modify its content and visual presentation. Essentially, it connects web pages to scripts or programming languages. https://developer.mozilla.org/en/DOM
  6. HTML and the DOM. html head body meta title div ul div div div li li li p p p a a a
  7. The real DOM Document .getElementById(‘tabs’) html Element head id=”tabs” Element body Element Element meta title Element .innerHTML div Element Element Element Element ul div div div Element Element Element Element Element Element li li li p p p Element Element Element a a a
  8. One other thing to mention
  9. The DOM is NOT JavaScript Blue is for JavaScript, Red is for DOM var anchorTags = document.getElementsByTagName(“a”) for (var i = 0;i <anchorTags.length; i++) { alert(“Href of this a element is: “ + anchorTags[i].href); } https://developer.mozilla.org/en/The_DOM_and_JavaScript
  10. Adding Behaviors to HTML EVENTS
  11. onLoad
  12. onClick
  13. onMouseOver
  14. etc... http://www.w3schools.com/jsref/jsref_events.asp
  15. That’s the Basics.
  16. Awesome! We know the DOM Now What?
  17. You don’t need to learn the DOM JavaScript Libraries can work with the DOM better than you!.
  18. JavaScript Libraries encapsulate browser inconsistencies.
  19. jQuery Write Less. Do More
  20. jQuery Basics $( [find something] ).doSomething(); CSS Selector jQuery Method
  21. Hide Children of Element
  22. Get Elements by Class Good Luck doing this with just the DOM and JavaScript
  23. jQuery.com
  24. visualjquery.com
  25. OK... Let’s build tabs
  26. An Example http://www.elated.com/articles/javascript-tabs/
  27. Objective. • Turn an HTML Document with an Unordered List into tabbed content. • Format the HTML using CSS. • Add Behavior so that you can change tabs onClick of the tab name.
  28. The HTML (again)
  29. The CSS A topic for another day
  30. Four JavaScript Functions • init() . sets up the tabs • showTab() displays a clicked tab's content and highlights the tab. • getFirstChildWithTagName() is a helper function that retrieves the first child of a given element that has a given tag name. • getHash() is another short helper function that takes a URL and returns the part of the URL that appears after the hash (#) symbol.
  31. Demo index_hard.html
  32. You need to know a lot. • CSS • Document Object Model (DOM) • JavaScript • Language Constructs • Verify that the JavaScript works in other browsers.
  33. This won’t work in IE Finds a different node in IE
  34. I just want tabs. Not a Computer Science Degree
  35. The Easy Way.
  36. jQuery and jQuery UI
  37. Review jQuery Basics $( [find something] ).doSomething(); $(“#tabs”).tabs(); CSS Selector jQuery UI Method
  38. A Few jQuery UI Methods .draggable() .droppable() .selectable() .accordion() .slider() etc...
  39. Include the Library and a one liner to implement
  40. The DOM has to be ready $(document).ready(function() { // Code Goes Here });
  41. The DOM has to be ready $(document).ready(function() { $(“#tabs”).tabs(); });
  42. The Drupal Way Drupal.behaviors.loadTabs = function(context) { // Code Goes Here };
  43. The Drupal Way Drupal.behaviors.loadTabs = function(context) { $(“#tabs”).tabs(); };
  44. Why use Drupal.behaviors? • Ability to override JS • Behaviors are re-attachable • Attach Behaviors to a specific context • HTML loaded via AHAH Drupal.attachBehaviors(elem);
  45. Demo index_easy.html
  46. Demo Drupal.behaviors
  47. Resources http://jquery.com and http://jqueryui.com http://www.elated.com/articles/javascript-tabs/ http://api.drupal.org/api/file/developer/topics/javascript_startup_guide.html/6 http://raincitystudios.com/blogs-and-pods/katherine-bailey/the-lowdown- jquery-drupal-part-two http://www.chapterthree.com/blog/josh_koenig/ handling_aysnchronous_data_drupal_session_materials https://developer.mozilla.org/en/JavaScript
  48. Questions?

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