I want to add a extra unique class in body tag so that it will come only for the anonymous user.
How to add it?
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Possible duplicate of Add CSS class to body for admin-end – WaQaR Ali Oct 14 '15 at 9:30
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drupal.stackexchange.com/questions/97806/… – WaQaR Ali Oct 14 '15 at 9:32
The proper way to do this is in a preprocess hook:
function MYTHEME_preprocess_html(&$vars) {
if (user_is_anonymous()) {
$vars['classes_array'][] = 'foo-class';
}
}
Don't try to make this decision in a template file, you'll find it doesn't work properly when you have caching enabled. Or it'll break your caching entirely for the page.
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1In fact, core already uses this exact method in
template_preprocess_htmland either addslogged-inornot-logged-in, so a class should already be there. – mpdonadio♦ Oct 14 '15 at 15:23 -
Yep you're spot on @MPD, I just checked a few sites and they all have that class. Probably worth an answer actually – Clive♦ Oct 14 '15 at 15:25
Core already does this for you. If you examine includes/theme.inc, you will find the implementation for template_preprocess_html() which is run by default before module and theme specific versions. In it is this code blip
function template_preprocess_html(&$variables) {
// ...
$variables['classes_array'][] = $variables['logged_in'] ? 'logged-in' : 'not-logged-in';
// ...
}
So, there are already body classes, logged-in and not-logged-in, added for you. If those classes is not there, something is altering the $variables['classes_array'] in a naughty way.
