I'm developing a plugin and I'd like to use colorbox in my plugin . So I use wp_enqueue_script('jquery'); but it doesn't work . Then I search for it and add the following code and it is working now . But why should I deregister jquery ?
wp_deregister_script('jquery');
wp_register_script('jquery', 'http://ajax.googleapis.com/ajax/libs/jquery/1.8.1/jquery.min.js', false, '1.8.1');
wp_enqueue_script('jquery');
Linking jquery code twice conflicts the functions as they are present twice. So deregistering helps you but it is not good choice. You should go through jQuery no conflict thing. And you should register your jquery version with different name, so that it does not break wordpress.
Ref- jQuery Forum and Documentation
Building off what Vishal & toscho wrote:
You should avoid deregistering WordPress's version of jQuery. What those lines do is tell WP that you do not want to use their version, and that you want to use a different version of jQuery (version 1.8.1 in your example). Depending on your version of colorbox, the reason it might work now is because it wasn't compatible with the latest version of jQuery included in WP core.
So the best solution would be to find a jQuery plugin that works with the latest version of jQuery.
wp_enqueue_script('jquery'); first and it didn't work. They didn't say they were using two versions of jQuery, just that the WP one didn't work. If it was related to not using no conflict mode, wouldn't it still not work?
Commented
Nov 14, 2016 at 13:12