Did you found it Easy and friendly?
Do you believe that it can get easier and gave you more it can do ?
Do you believe that you can write less and do more?
- Very high level, it can even be Object Oriented.
- Portable and ideal, no problem to use it anywhere or any device.
- Dynamic, which gave spirit to the static HTML tags,”also HTML5 supports it strongly”.
- Weakly typed , no restricted syntax, no restricted roles.
- It’s today's trend.
Although, it gave some shortage in the following points:
- Limiting in resources.
- Limited IDE Support since too little IDEs that provide syntax checking and auto-complete.
- No Debuggers, Errors due to JS are hard to eb detected and debugging although developer tools in browsers now facilitate the problem but not solved.
- Browser Compatibility which is the biggest issue JS developer can meet, since some functionality is supported by browser but no other.
Figure 1: jQuery Logo
They could in few years hide the major browser differences so Problem of compatibility had now gone in addition to simplifying common operations “using the concept of write less” and providing clean APIs for dealing with DOM , animation , Ajax , JSON , etc.
Which are open source and editable, so anyone can upgrade it and add his own addition to satisfy his increasing needs.
Really, worth trying.
It took the trend of DOM traversing, event handling, working with Ajax sufficiently and Effects & animations.
Because it's very powerful, integration happened between it and some frameworks to become essential part of it, like ASP.net MVC and Struts 2.
But why they preferred to use it instead of other libraries? i.e. why it became standard?
For the following reasons:
- They are friendly APIs, easy reading, understanding and editing.
- DOM traversing is very easy specially for complex criterion,now it's easy to select, traverse and modify elements contents by calling it's selector.
- Library is available to download with demos how to use, and very small size i.e. its light weight, which will not make overhead on the project especially with maven.
- Effects and animations “like calender, accordion, dialogs, fade in and out, etc. Are now available with new trends in the code library so no need to get additional .js files.
- Plug-ins are available to cover all need
- rich UI and Controls
- Event handling with widely used events defined in jquery even without exposing ourselves to HTML code events.
- Ajax support that gave interactivity with server to the HTML code, using Ajax , data can be sent to servlet, action, etc and get response to be displayed on the page, the most seen examples in ajax is loading cities according to selected country.
- It supports CSS3 selectors and xpath syntax. The most famous projects written using jQuery was OS simulator, and online office.
Evolution of JQuery and changes: “according to wikipedia and jquery website”:
|Version number||Release date||Additional notes|
|1.0||August 26, 2006||First stable release|
|1.0.1||August 31, 2006|
|1.0.2||October 9, 2006|
|1.0.3||October 27, 2006|
|1.0.4||December 12, 2006||Last 1.0 bug fix|
|1.1||January 14, 2007|
|1.1.1||January 22, 2007|
|1.1.2||February 27, 2007|
|1.1.3||July 1, 2007|
|188.8.131.52||July 5, 2007|
|1.1.4||August 24, 2007|
|1.2||September 10, 2007|
|1.2.1||September 16, 2007|
|1.2.2||January 15, 2008|
|1.2.3||February 8, 2008|
|1.2.4||May 19, 2008|
|1.2.5||May 21, 2008||Fix for bad build of 1.2.4|
|1.2.6||May 24, 2008|
|1.3||January 14, 2009||Sizzle Selector Engine introduced into core|
|1.3.1||January 21, 2009|
|1.3.2||February 20, 2009|
|1.4||January 14, 2010|
|1.4.1||January 25, 2010|
|1.4.2||February 19, 2010|
|1.4.3||October 16, 2010|
|1.4.4||November 11, 2010|
|1.5||January 31, 2011||Deferred callback management, ajax module rewrite|
|1.5.1||February 24, 2011|
|1.5.2||March 31, 2011|
|1.6||May 3, 2011||Significant performance improvements to the attr() and val() functions|
|1.6.1||May 12, 2011|
|1.6.2||June 30, 2011|
|1.6.3||September 1, 2011|
|1.6.4||September 12, 2011|
|1.7||November 3, 2011||New Event APIs: .on() and .off(), while the old APIs are still supported.|
|1.7.1||November 21, 2011|
|1.7.2||March 21, 2012|
|1.8.0||August 9, 2012||Sizzle Selector Engine rewritten, improved animations and $(HTML, props) flexibility.|
|1.8.1||August 30, 2012|
|1.8.2||September 20, 2012|
|1.8.3||November 13, 2012|
|1.9.0||January 15, 2013||Removal of deprecated interfaces and code cleanup|
|1.9.1||February 04, 2013|
|2.0.0||early 2013||Dropping IE6-8 support for performance improvements and reduction in file-size|
Another question, does it mean that using jQuery prevent from using other library with?
The answer is NO, you can include any libraries together without conflicting. It's the power of libraries.
It means that you can use strings, numbers, objects, functions, callign context as usual without any change and with the old syntax.
Well, now we know why we should use JQuery, but the question is how to use it?
You can download the source jquery-..-min.js from the official website and include it to your project or use the online support by including the following to page head:
Listing 1: Using jquery
<link rel="stylesheet" href="http://code.jquery.com/ui/1.10.0/themes/base/jquery-ui.css" /> <script src="http://code.jquery.com/jquery-1.8.3.js"></script> <script src="http://code.jquery.com/ui/1.10.0/jquery-ui.js"></script>
Calling jquery function:
Listing 2 : Using jquery
Or it can be abbreviated to be
The reason for writing code inside the previous selector is to stop any jquery code of being executed before the document is fully loaded.
This is all for a basic introduction. See you next time.