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JQuery and JSSpec Making the Web Developer Friendly

JQuery and JSSpec Making the Web Developer Friendly. Philip Japikse phil.japikse@telerik.com MVP, MCSD.Net, MCDBA, CSM, CSP Patterns & Practices Evangelist Telerik. Who am I?. Patterns & Practices Evangelist, Telerik, Inc. Microsoft MVP MCSD, MCDBA, CSM, CSP Coder/Speaker/Writer

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JQuery and JSSpec Making the Web Developer Friendly

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  1. JQuery and JSSpecMaking the Web Developer Friendly Philip Japikse phil.japikse@telerik.com MVP, MCSD.Net, MCDBA, CSM, CSP Patterns & Practices Evangelist Telerik

  2. Who am I? • Patterns & Practices Evangelist, Telerik, Inc. • Microsoft MVP • MCSD, MCDBA, CSM, CSP • Coder/Speaker/Writer • Lead Director, Cincinnati .NET User’s Group • Founder, Agile Conferences, Inc.

  3. Motivation • Browsers stink

  4. JSSpec • Behavior Driven Development style test Framework for JavaScript • http://jania.pe.kr/aw/moin.cgi/JSSpec • Include: • diff_match_patch.js • JSSpec.css • JSSpec.js <script type="text/javascript"> // <![CDATA[ describe('When selecting by id (#I)', { 'Should Return one element in wrapped set with id I': function () { (expect$('#fieldSetID').size()).toEqual(1); } });

  5. JQuery • Unobtrusive JavaScript • CSS Selectors (plus more) • http://docs.jquery.com/Selectors • Managing Wrapped Sets • DOM Manipulation • Event Handling • Extensible

  6. Unobtrusive JavaScript • Ready Function • Fires when the DOM is loaded (doesn’t wait for media) • $(document).ready(function() {}); • $(function(){}); • Separates markup from programming • (wrapped set).action • click • toggle • hover • etc

  7. Which Browser? • If browser type and version are needed • Browser Check • $.browser.msie • $.browser.mozilla • $.browser.safari || $.browser.webkit • $.browser.opera • Version Check • $.browser.version • Better method • $.support $("p").html("This frame uses the W3C box model: <span>" +jQuery.support.boxModel + "</span>");

  8. CSS Selectors • Id (#foo) • Element (table#foo) • Element Type (a) • Parent child* (table tr) • Parent (direct)child* (table > tbody) • sibling(immediately preceded by) (td+a) • Sibling (preceded by) (td ~ a) • Element has descendent (tr:has(a)) • Element has class (a.classname) • All that has class (.classname)

  9. More CSS Selectors • Element has attribute (a[style]) • Element has attribute (case sensitive) • With value (a[style=“height: 100%”]) • Value begins with (a[style^=“height”] • Value ends with (a[style$=“100%”]) • Value contains (a[style*=“10”]) • Positional • First (E:first) • Last (E:last)

  10. And finally… • Child calcs • First Child (e:first-child) • Last child (tr:last-child) • Only Child (E:only-child) • Nth child (tr:nth-child(n)) • Even/Odd (tr:nth-child(even))

  11. JQuery Selector Additions • Element Type • :button • :submit • :checkbox • :radio • :text • :input • :header • Others • :contains • :checked • :parent • :hidden/:visible • :disabled/:enabled • :not

  12. Managing Wrapped Sets • .size() – Count of items • .get(x)/.get() – return item/all items • .index(elem) – Position of item in set • .add(<selector>) – Include into set • $(<selector1>,<selector2>) • $(<selector1>).add(<selector2>) • .not(<selector>) - Exclude from set • .filter(function(){}) • $('tr').filter(function() { return this.innerHTML.match('Row 1') }) • .slice(start,finish) - create a new set from range of elements in original set

  13. More Wrapped Set Fun • .children() – get unique children of all items • .contents() – get contents of all items • .next() – get unique next siblings • .nextAll() – get all following siblings • .prev() – get unique next siblings • .prevAllAll() – get all following siblings • .parent() – get immediate parent of items • .parents() – get all parents of items • .siblings() – get all siblings of items

  14. Even More Wrapped Set Fun • .find(<selector>) – new set with search • .contains(<text>) – set from current where items contain <text> • .clone() – create new wrapped set • .end() – back up in chain to previous set • .andSelf() – merges two sets in method chain into one wrapped set • .is(<selector>) – validates that at least one item passes selection criteria

  15. Reading/Changing Set Elements • JS iterator • .each(function() {$(this).html(<html>);}); • Getting/Changing Element Values • .val() - Get’s value of first element • .val(<value>) - Set’s value of all elements • .val(<values>) – set all wrapped Check/Radio/Options to be set if match found with values passed in • Getting/Changing Element HTML • .html() – returns html from first item in set • .html(<html>) – sets html for all items in set • Clearing Content • .remove() – removes all elements from the DOM • .empty() – removes contents of elements from the DOM

  16. DOM Manipulation • Append Elements • .append(<html>|<selector>|object) • .appendTo(<html>|<selector>) • Wrapping Elements • .wrap(<html>|<selector>) • .wrapAll(<html>|<selector>) • .wrapInner(<html>|<selector>)

  17. CSS/Attribute Options • Attributes • .attr(<attribute name>,value || <list>,value) • .removeAttr(<attribute name>) • CSS Styles • .css(<property>,<value>) • CSS Classes • .addClass(<class name>) • .hasClass(<class name>) • .toggleClass(<class name>) • .removeClass(<class name>)

  18. Event Handling • Use wrapped sets to bind | unbind events • No more mixing Code + Markup • General format • .bind(<event>,optional <data>,function(e) {} ); • $(‘table’).bind(‘click’, function(e) { alert(‘foo’);}); • .unbind(<event>) • Shortcuts (just a few of them) • mouse • over/out/down/up/move • blur/focus/change/(dbl)click/select • (un)load/submit/error • keydown/keypress/keyup

  19. More Event Handling • Special • .hover(<Func>,<Func>) • replaces mouseover/mouseout • .one(<event>,optional <data>, <func>) • Unbind after first execution • trigger(<event>) • toggle(<Func Even>,<Func Odd>) • Each click switches the event handler

  20. Effects • Speed • “slow”, ”normal”, ”fast”, # milliseconds • Callback • Called when animation completes • Context (this) set to the element target for animation • Opacity • Value from 0 (invisible) to 1 (visible) • Forcing a stop • .stop()

  21. Effects • Visibility • Hide/Show • .hide(<speed>, <callback>) • .show(<speed>, <callback>) • .toggle(<speed>, <callback>) • Fades • .fadeOut(<speed>, <callback>) • .fadeIn (<speed>, <callback>) • .fadeTo (<speed>, <opacity>, <callback>) • Slides • .slideDown(<speed>, <callback>) • .slideUp(<speed>, <callback>) • .slideToggle(<speed>, <callback>)

  22. Extensibility • www.plugins.jquery.com • UI Plug-in • http://jqueryui.com/download • Form Plug-in • http://plugins.jquery.com/project/form

  23. Contact Me • phil@telerik.com • www.skimedic.com/blog • www.twitter.com/skimedic • Telerik • www.twitter.com/Telerik • www.facebook.com/Telerik

  24. Stay up to date with MSDN Belux • Register for our newsletters and stay up to date:http://www.msdn-newsletters.be • Technical updates • Event announcements and registration • Top downloads • Follow our bloghttp://blogs.msdn.com/belux • Join us on Facebookhttp://www.facebook.com/msdnbehttp://www.facebook.com/msdnbelux • LinkedIn: http://linkd.in/msdnbelux/ • Twitter: @msdnbelux DownloadMSDN/TechNet Desktop Gadgethttp://bit.ly/msdntngadget

  25. TechDays 2011 On-Demand • Watchthis session on-demand via Channel9http://channel9.msdn.com/belux • Download to your favorite MP3 or video player • Get access to slides and recommended resources by the speakers

  26. THANK YOU Stop by the Telerik Booth and say “hi”

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