Remove every Javascript except own theme scripts

Question

In my current Drupal 6 installation, a lot of Javascript scripts are being loaded (core scripts, jQuery, modules, etc).

I only have one script in my theme that I need, so I want to only include that file and get rid of everything else.

What's the best way to accomplish this?

Answer 1

In your template.php you can override the generation of $vars['scripts'] to be just your file.

However, I suspect that this is a really bad idea and may have a lot of consequences.

Answer 2

You can put something like this in your template.php:

function phptemplate_preprocess_page(&$vars) {
  drupal_add_js($theme_path . '/js/your_js.js', 'theme'); 

  $js = drupal_add_js();
  unset($js['core']); 
  unset($js['module']); // or
  unset($js); // but then it would also clear the drupal_add_js above
  $vars['scripts'] = $js;
}

Answer 3

Drupal ships jQuery as a default JavaScript library. It is not included to the system unless a JavaScript code is added by recommended way using:

• Adding an entry to scripts array in theme info (ini) file
• Calling drupal_add_js()

A number of other scripts are also added by core and modules.

You can manage to stop them by overriding phptemplate_preprocess_page function in your themes' template.php

If you want to include a single JS file due to performance penalty of loading a lot of script you can turn on Optimize JavaScript files at example.com/admin/settings/performance. After enabling it you will have to flush cache in order the changes to take effect.

Answer 4

This is a pretty old issue but I can't really see a good solution on here so I thought I'd write one.

Basically what you need to do in your template.php is use hook_js_alter($js) then use devel (or what ever you prefer to debug with) to see what the $js array has in it.

Unset what you do now want to have included. Be aware that you'll lose quite a lot of functionality if you remove drupal.settings.

I would advise keeping jQuery. If you must use another version of jQuery use the jquery update module (http://drupal.org/project/jquery_update), or if you are importing JS from another source then just make sure that your version is loaded above where drupal.settings is loaded.

Answer 5

Drupal only has one sanctioned mechanism for removing specific assets, regardless of the motivation for doing so.

For CSS:

hook_css_alter

For JS:

hook_js_alter

To remove all style and scripts except .info style and script use below codes:

function hook_css_alter(&$css) {
    $themes=list_themes();
          foreach($css as $key=>$item) {
            if (!in_array($key, $themes['yourthemename']->stylesheets['all'])) {
                unset($css[$key]);
            }
        }
}



function hook_js_alter(&$js) {
    $themes=list_themes();
    foreach($js as $key=>$item) {
        if (!in_array($key, $themes['yourthemename']->scripts)) {
            unset($js[$key]);
        }
    }
}

If the theme/module is custom, then obviously you can just remove the offending code manually if that makes more sense.