How do you install jQuery in WordPress?

2 comments

1. Though one of the Answer is already Accepted but I feel the following technique may help somebody.

   Include the following code at Plugin Page OR at function.php

   function include_jQuery() {
       if (!is_admin()) {
           wp_enqueue_script('jquery');
       }
   }
   add_action('init', 'include_jQuery');
   

   Definitely you can use any meaningful function name instead off include_jQuery.

   Alternately, you can use the following code:

   function include_jQuery() {
       if (!is_admin()) {
           // comment out the next two lines to load the local copy of jQuery
           wp_deregister_script('jquery'); 
           wp_register_script('jquery', 'http://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js', false, '1.8.3'); 
           wp_enqueue_script('jquery');
       }
   }
   add_action('init', 'include_jQuery');
   

   Finally, as a general rule, you should not use the $ variable for jQuery unless you have used one of the shortcuts. The following is an example of how to shortcut jQuery to safely use the $ variable:

   jQuery(function ($) {
       /* You can safely use $ in this code block to reference jQuery */
   });
   

   You may like THIS link as well from where I personally learn the above technique(s). A Very BIG Thanks to Ericm Martin!

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2. Jquery Already packaged with the WordPress installation, and gets available with it.
   Check the source code when you get your new WordPress Blog installed.

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