Difference between revisions of "JQuery"

From Organic Design wiki
(Document.ready may slow load time in the case of load() and ajax())
(Change source-code blocks to standard format)
 
(7 intermediate revisions by 2 users not shown)
Line 1: Line 1:
−
=== Supported CSS Selector expressions. ===
+
[[w:jQuery|jQuery]] is a cross-browser [[JavaScript]] library designed to simplify the client-side scripting of HTML. It was released in January 2006 at [[w:BarCamp|BarCamp]] NYC by [[w:John Resig|John Resig]]. Used by over 55% of the 10,000 most visited websites, jQuery is the most popular JavaScript library in use today.
−
* * any element
 
−
* E an element of type E
 
−
* E:nth-child(n) an E element, the n-th child of its parent
 
−
* E:first-child an E element, first child of its parent
 
−
* E:last-child an E element, last child of its parent
 
−
* E:only-child an E element, only child of its parent
 
−
* E:empty an E element that has no children (including text nodes)
 
−
* E:enabled a user interface element E which is not disabled
 
−
* E:disabled a user interface element E which is disabled
 
−
* E:checked a user interface element E which is checked (for instance a radio-button or checkbox)
 
−
* E:selected a user interface element E which is selected (one or more option elements inside a select) - not in the CSS spec, but nonetheless supported by jQuery
 
−
* E.warning an E element whose class is "warning"
 
−
* E#myid an E element with ID equal to "myid". (Will only match, at most, one element.)
 
−
* E:not(s) an E element that does not match simple selector s
 
−
* E F an F element descendant of an E element
 
−
* E > F an F element child of an E element
 
−
* E + F an F element immediately preceded by an E element
 
−
* E ~ F an F element preceded by an E element
 
−
* E,F,G select all E elements, F elements, and G elements
 
−
   
 
  
−
=== Using CSS and XPath Together ===
+
jQuery is [[Open Source|free, open source software]], [[w:Dual-licensing|dual-licensed]] under the [[w:MIT License|MIT License]] or the [[w:GNU General Public License Version 2|GPL v2]]. jQuery's syntax is designed to make it easier to navigate a document, select [[w:Document Object Model|DOM]] elements, create animations, handle events, and develop [[w:Ajax (programming)|Ajax applications]]. jQuery also provides capabilities for developers to create plug-ins on top of the JavaScript library. This enables developers to create abstractions for low-level interaction and animation, advanced effects and high-level, theme-able widgets. The modular approach to the jQuery library allows the creation of powerful dynamic web pages and web applications.
−
Hide all Paragraph elements that contain a class attribute:
 
−
$("p[@class]").hide();
 
  
−
Show the first paragraph on the page:
+
== jQuery plugins and libraries powered by jQuery ==
−
$("p:eq(0)").show();
+
*[http://jplayer.org/latest/demos/ jPlayer] ''- cross-platform audio/video embedding for web pages''
  
−
Hide all divs that are currently showing:
+
== jQuery File Upload ==
−
$("div:visible").hide();
+
*[http://blueimp.github.com/jQuery-File-Upload/ Demo]
−
 
+
*[https://github.com/blueimp/jQuery-File-Upload/wiki/ Wiki]
−
Get all list items that are children of an unordered list:
+
*[https://github.com/blueimp/jQuery-File-Upload/wiki/Plugin-extensions Extending the plugin]
−
$("ul/li")
+
*[https://github.com/blueimp/jQuery-File-Upload/archives/master Source code]
−
/* valid too: $("ul > li") */
 
−
 
 
−
Get all Paragraphs, with a class of 'foo', that have a link in them:
 
−
$("p.foo[a]");
 
−
 
 
−
Get list item that contains link with "Register" text inside:
 
−
$("li[a:contains('Register')]");
 
−
 
 
−
Get the input field's value with the name of 'bar':
 
−
$("input[@name=bar]").val();
 
−
 
 
−
All checked radio buttons:
 
−
$("input[@type=radio][@checked]")
 
−
 
 
−
== Other libraries powered by jQuery ==
 
−
 
 
−
=== jKey ===
 
−
*[http://oscargodson.com/labs/jkey/ jKey]
 
  
 
=== jFormer - jQuery Form Framework ===
 
=== jFormer - jQuery Form Framework ===
Line 70: Line 30:
 
*'''No building required:''' This framework does not require you to build the application using scaffolding or any other command-line executables. You just download it and open it up in a browser.
 
*'''No building required:''' This framework does not require you to build the application using scaffolding or any other command-line executables. You just download it and open it up in a browser.
 
*'''Small Framework:''' This framework is very small (and excessively commented). It doesn't do anything more than it is supposed to.
 
*'''Small Framework:''' This framework is very small (and excessively commented). It doesn't do anything more than it is supposed to.
 +
 +
== Sorting lists ==
 +
[http://www.onemoretake.com/2009/02/25/sorting-elements-with-jquery/ Here's] an excellent compact method of sorting list items based on any kind of criteria that uses jQuery without any other plugins. In the example below, the lists on the pages are sorted according to the anchor text in a link contained in the LI item.
 +
<source lang="js">
 +
var mylist = $('ul');
 +
var listitems = mylist.children('li').get();
 +
listitems.sort(function(a, b) {
 +
  var compA = $('a',a).html().toUpperCase();
 +
  var compB = $('a',b).html().toUpperCase();
 +
  return (compA < compB) ? -1 : (compA > compB) ? 1 : 0;
 +
})
 +
$.each(listitems, function(idx, itm) { mylist.append(itm); });
 +
</source>
  
 
== See also ==
 
== See also ==
Line 82: Line 55:
 
*[[The Module pattern]]
 
*[[The Module pattern]]
 
*[http://encosia.com/dont-let-jquerys-document-ready-slow-you-down/ Document.ready may slow load time in the case of load() and ajax()]
 
*[http://encosia.com/dont-let-jquerys-document-ready-slow-you-down/ Document.ready may slow load time in the case of load() and ajax()]
−
[[Category:Software]]
+
:''basically what this is saying is document.ready may slow you down if you do other important jQuery stuff before document.ready - which you shouldn't do --[[User:Nad|nad]] 14:13, 17 February 2012 (PST)''
 +
[[Category:Libre software]]{{lowercase}}

Latest revision as of 18:11, 22 May 2015

jQuery is a cross-browser JavaScript library designed to simplify the client-side scripting of HTML. It was released in January 2006 at BarCamp NYC by John Resig. Used by over 55% of the 10,000 most visited websites, jQuery is the most popular JavaScript library in use today.

jQuery is free, open source software, dual-licensed under the MIT License or the GPL v2. jQuery's syntax is designed to make it easier to navigate a document, select DOM elements, create animations, handle events, and develop Ajax applications. jQuery also provides capabilities for developers to create plug-ins on top of the JavaScript library. This enables developers to create abstractions for low-level interaction and animation, advanced effects and high-level, theme-able widgets. The modular approach to the jQuery library allows the creation of powerful dynamic web pages and web applications.

jQuery plugins and libraries powered by jQuery

  • jPlayer - cross-platform audio/video embedding for web pages

jQuery File Upload

jFormer - jQuery Form Framework

jFormer is a form framework written on top of jQuery that allows you to quickly generate beautiful, standards compliant forms. Leveraging the latest techniques in web design, jFormer helps you create web forms that:

  • Validate client-side
  • Validate server-side
  • Process without changing pages (using AJAX)

CorMVC - jQuery-powered Model-View-Controller Framework

CorMVC is a jQuery-powered Model-View-Controller (MVC) framework that can aide in the development of single-page, web-based applications. CorMVC stands for client-only-required model-view-controller and is designed to be lowest possible entry point to learning about single-page application architecture. It does not presuppose any server-side technologies, or a web server of any kind, and requires no more than a web browser to get up and running.

It evolved out of the author's (Ben Nadel) recent presentation, Building Single-Page Applications Using jQuery And ColdFusion, and will continue to evolve as he thinks more deeply about this type of application architecture.

We're building an experimental nodal interface to make a start on the unified ontology using corMVC.

Features
  • A large sample application: The whole demo site (including the contacts section) runs off of corMVC as a single-page application.
  • No server required: The demo application does not require any additional server-side technologies. If you have a web browser, you can download and run this application immediately.
  • No building required: This framework does not require you to build the application using scaffolding or any other command-line executables. You just download it and open it up in a browser.
  • Small Framework: This framework is very small (and excessively commented). It doesn't do anything more than it is supposed to.

Sorting lists

Here's an excellent compact method of sorting list items based on any kind of criteria that uses jQuery without any other plugins. In the example below, the lists on the pages are sorted according to the anchor text in a link contained in the LI item. 

var mylist = $('ul');
var listitems = mylist.children('li').get();
listitems.sort(function(a, b) {
   var compA = $('a',a).html().toUpperCase();
   var compB = $('a',b).html().toUpperCase();
   return (compA < compB) ? -1 : (compA > compB) ? 1 : 0;
})
$.each(listitems, function(idx, itm) { mylist.append(itm); });

See also

basically what this is saying is document.ready may slow you down if you do other important jQuery stuff before document.ready - which you shouldn't do --nad 14:13, 17 February 2012 (PST)
Retrieved from "https://organicdesign.nz/wiki/index.php?title=JQuery&oldid=119866"