Joomla 3.4.1 how to delete JCaption, called with jQuery?

Question

I want to delete JCaption from head, jquery and jcaption file i deactivated with following methods:

unset($doc->_scripts[JURI::root(true) . '/media/jui/js/jquery.min.js']);
unset($doc->_scripts[JURI::root(true) . '/media/jui/js/jquery-noconflict.js']);
unset($doc->_scripts[JURI::root(true) . '/media/jui/js/jquery-migrate.min.js']);
unset($doc->_scripts[JURI::root(true) . '/media/system/js/caption.js']);

To delete jcaption on previous versions where mootools in using is it's needed:

$this->_script = preg_replace('%window\.addEvent\(\'load\',\s*function\(\)\s*{\s*new\s*JCaption\(\'img.caption\'\);\s*}\);\s*%', '', $this->_script);

I tried also so to delete it on jquery but i don't have with preg_replace() experience, what's to do to delete JCatpion from head?

My code:

$this->_script = preg_replace('%jQuery\(window\)\.on(\'load\',\s*function\(\)\s*{\s*new\s*JCaption\(\'img.caption\');\s*}\);\s*%', '', $this->_script);

Answer 1

This is a very old question and probably nobody reads it anymore, but anyways I will post my answer.

In the regex for the JQuery caption you have errors. You don't need to escape dots but you have to escape special characters. And also you need to target the correct key in the array so you need to add ['text/javascript'] after calling the script object.

So the correct regex/preg_replace would be:

$this->_script['text/javascript'] = preg_replace('%jQuery\(window\).on\(\'load\',\s*function\(\)\s*\{\s*new\s*JCaption\(\'img.caption\'\)\;\s*\}\)\;\s*%', '', $this->_script['text/javascript']);

Not so long ago I was also struggling with regex but this site helped a lot: http://regexr.com/ If you trying out the site note that you don't need to use the open and close tags because its already there automatically.

Answer 2

Try this:

$this->_scripts = array();
unset($this->_script['text/javascript']);

Answer 3

A better solution for disabling JCaption injection in content pages is to override Joomla's core 'behavior.caption' HTML behavior with a stub function. You achieve this by creating a simple system plugin as follows:

use Joomla\CMS\HTML\HTMLHelper;

class PlgSystemCaptionDisabler extends JPlugin
{
    function onAfterInitialise() {
        if (!HTMLHelper::isRegistered('behavior.caption')) {
            HTMLHelper::register('behavior.caption', array(__CLASS__, 'caption'));
        }
    }

    // Dummy override function to disable default Joomla 'caption' behavior
    public static function caption() {}
}

Answer 4

Try this:

if (isset($this->_script['text/javascript']))
{
    $this->_script['text/javascript'] = preg_replace('%window\.addEvent\    (\'load\',\s*function\(\)\s*{\s*new\s*JCaption\(\'img.caption\'\);\s*}\);\s*%',     '', $this->_script['text/javascript']);
    if (empty($this->_script['text/javascript']))
        unset($this->_script['text/javascript']);
}
$this->_scripts = array();

Answer 5

If you are willing to use a plugin to unset the script tag injected, the following can be useful.

public function onBeforeRender() {
    // Front end
    if ($this->app instanceof JApplicationSite) {
        $doc = JFactory::getDocument();

        foreach ($doc->_script as $key => $script) {
            if (stristr($key, 'text/javascript') !== false) {
                unset($doc->_script['text/javascript']);
            }
        }
    }
}