Using Objects to Organize your jQuery Code

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When you move beyond simple snippets of jQuery and start developing more complex interactions, your code can quickly become unwieldy and difficult to debug and maintain. In this presentation, I …

When you move beyond simple snippets of jQuery and start developing more complex interactions, your code can quickly become unwieldy and difficult to debug and maintain. In this presentation, I outline an object-based approach to organizing your jQuery.

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  • jQuery gives developers a lot of freedom when it comes to structuring code; no hard-and-fast rules about right/wrong

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  • 1. object laterals object literals using objects to organize your code jQuery Conference 2009 ~ Boston, MA @rmurphey ~ rebecca@rebeccamurphey.com http://blog.rebeccamurphey.com/organize-your-jquery/ Sunday, September 13, 2009
  • 2. me • Independent front-end architecture consultant in Durham, N.C. • @rmurphey on Twitter • http://www.rebeccamurphey.com Sunday, September 13, 2009
  • 3. why objects? Sunday, September 13, 2009
  • 4. jQuery is easy to write Sunday, September 13, 2009
  • 5. complex jQuery is easy to write badly Sunday, September 13, 2009
  • 6. a simple example Load some content when a list item is clicked; hide the content for sibling list items Sunday, September 13, 2009
  • 7. Sunday, September 13, 2009
  • 8. the url needs to be configurable can we cache the content? what about back button support? animation is so web 2.0 let’s add a lightbox! doh, we forgot to mark the current list item Sunday, September 13, 2009
  • 9. // NAVIGATION function togglePage(section) { // if the clicked section is already the current section AND we're in full page mode // minimize the current tab if (jQuery('#md_tab_'+ section).hasClass('current') && jQuery('#md_tab_'+ section + ' a').hasClass('md_fullpage')) { // alert('clicked section is current section AND fullpage mode is active; teaser should load'); // Minimize jQuery('#md_tabs_navigation a').removeClass('md_fullpage'); jQuery('.md_body').hide(); jQuery('#md_feature').slideDown('normal',function(){ var bodyContent = jQuery('#md_body_'+ section); bodyContent.fadeOut('normal',function(){ jQuery('#md_tabs_navigation a').each(function(){ var thisSection = jQuery(this).html().replace('<span<','').replace('</span<',''); var thisSection_comp = thisSection.toLowerCase().replace(' ','_'); jQuery('#md_body_'+ thisSection_comp).load( '/app/modules/info/loadTeaser.php?sect='+ thisSection_comp, function(){ tb_init('.md_body a.thickbox, .md_body area.thickbox, .md_body input.thickbox'); bodyContent.animate({ height: 'toggle', opacity: 'toggle' },"slow"); } ); }); }); }); jQuery('#expandtabs span').empty().append('Expand Tabs'); } else { // if the clicked section is NOT the current section OR we're NOT in full page mode // then let's go to full page mode and show the whole tab // Maximize // alert('clicked section is not the current section OR full page mode is not active; full section should load'); jQuery('#md_tabs_navigation li').removeClass('current'); jQuery('#md_tab_'+ section).addClass('current'); jQuery('#md_tabs_navigation a').addClass('md_fullpage'); jQuery('.md_body').hide(); jQuery('#md_feature').slideUp('normal',function(){ var bodyContent = jQuery('#md_body_'+ section); Sunday, September 13, 2009 bodyContent.fadeOut('normal',function(){
  • 10. omg wtf. SRRY MS Sunday, September 13, 2009
  • 11. a solution: objects • Keep the global namespace clean • Encapsulate separate behaviors in methods • Set configuration options outside methods • Self-document with good method names and small methods • Make methods available to other code Sunday, September 13, 2009
  • 12. when does it make sense to use objects? • About an hour after you start trying to write a complex feature without them. Sunday, September 13, 2009
  • 13. no really • Features with ... • Multiple states • Multiple behaviors • Multiple points of interaction Sunday, September 13, 2009
  • 14. patterns Sunday, September 13, 2009
  • 15. object literal (singleton) • Simple setup • One instance per page • All methods and properties are public • May require initialization method Sunday, September 13, 2009
  • 16. Where are my privates!?!? Sunday, September 13, 2009
  • 17. module • Function returns an object • Self-initializing • Allows for private methods and properties Sunday, September 13, 2009
  • 18. Closures ftw Sunday, September 13, 2009
  • 19. IN UR JQUERY RITIN’ SOME OBJEX Sunday, September 13, 2009
  • 20. tips plz? Sunday, September 13, 2009
  • 21. • Write stubs to sketch out your feature • Centralize configuration – minimize quoted strings in non-config code • Create methods for event handling • Allow for external configuration if it makes sense Sunday, September 13, 2009
  • 22. awesome stuff we don’t have time for • Objects for managing code execution • Using object literals to define plugin submethods • Changing the meaning of “this” inside event handlers and opening up a world of win (native in 1.3.3?) • You should have been at Paul Irish’s talk Sunday, September 13, 2009
  • 23. thanks. • http://blog.rebeccamurphey.com/ organize-your-jquery/ • Rate this talk: http://speakerrate.com/ talks/1423 • Thanks to Paul Irish, Chris Williams, Victor Hong, Brian Mitchell, Ben Alman, and the folks in #jquery-ot Sunday, September 13, 2009