1 / 9

JQuery Plugins

JQuery Plugins. Samuel Zweig CMPS 183. A bit about JQuery. Lightweight JavaScript library Used by over 27% of the top 10,000 most visited websites [1] Open Source. A simple JQuery example. <! doctype html> <html> <head>

dora-craig
Download Presentation

JQuery Plugins

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. JQuery Plugins Samuel Zweig CMPS 183

  2. A bit about JQuery • Lightweight JavaScript library • Used by over 27% of the top 10,000 most visited websites[1] • Open Source

  3. A simple JQuery example <!doctype html> <html> <head> <script type="text/javascript" src="jquery.js"></script> // include jQuery itself <script type="text/javascript"> $(document).ready(function(){ // wait for DOM to be ready $("a").click(function(event){ // select all a elements // click () is a method of the JQuery object event.preventDefault(); // prevent default behavior $(this).hide("slow"); // cause link to slowly disappear }); }); </script> </head> <body> <a href="http://jquery.com/">jQuery</a> </body> </html>

  4. JQuery Plugins • Range from simple (a few lines of code) to very complex • Easy to write own plugins • Easy to use other developer’s plugins • Allow for the creation of elegant web apps with minimal effort. • A plugin is an extension of the JQuery object

  5. Making your own plugin • Motivation: prevent excessive code repetition

  6. Basic Steps • 1. Create a file called jquery.[your_plugin_name].js • 2. Create a method that extends the jQuery object. • 3. Create default settings for your method • 4. Create documentation (if you are going to share your plugin)

  7. Example plugin | Checkboxes jquery.checkbox.js[2] jQuery.fn.check = function(mode) { // if mode is undefined, use 'on' as default var mode = mode || 'on'; return this.each(function() { switch(mode) { case 'on': this.checked = true; break; case 'off': this.checked = false; break; case 'toggle': this.checked = !this.checked; break; } }); };

  8. Index.html <html> <head> <script type="text/javascript" src="jquery.js"></script> <script type="text/javascript" src="jquery.checkbox.js"></script> <script type="text/javascript"> $(document).ready(function() { $("#cbox2").check("on"); $("#cbox3").check("on"); }); </script> </head> <body> <form> here are some checkboxes </br> notice how the 2nd and 3rd boxes </br> are automatically checked.</br> <input type="checkbox" id="cbox1" /> </br> <input type="checkbox" id="cbox2" /> </br> <input type="checkbox" id="cbox3" /> </br> <input type="checkbox" id="cbox4" /> </br> </form> </body> </html>

  9. Sources • [1] http://en.wikipedia.org/wiki/JQuery#jQuery_Plug-ins • [2] http://docs.jquery.com/Tutorials:Getting_Started_with_jQuery

More Related