Title: Inline and defer CSS
Last modified: June 18, 2020
---
# Inline and defer CSS
* Resolved [jaromt](https://wordpress.org/support/users/jaromt/)
* (@jaromt)
* [5 years, 11 months ago](https://wordpress.org/support/topic/inline-and-defer-css-10/)
* Hi,
* I have a WP multisite of 6 sites. Also I have a devel web which is the copy of
1 of that sites. Google Pagespeed results are very poor, so I am testing Inline
and defer CSS option of Autoptimize. I inserted critical css and inserted this
code to functions.php to defer css only on homepage.
* ```
function critical_css_only_on_homepage() {
if (is_front_page()) {
return true;
} else {
return false;
}
}
add_filter('autoptimize_filter_css_defer', 'critical_css_only_on_homepage', 10, 1);
```
* On devel web it reduced First Contentful Paint time by 0,8s for mobile and 0,2s
for desktop. However on multisite web First Contentful Paint time remains the
same. Autoptimize configuration is enabled per site and I added different critical
css for each of that 6 sites. Where could be the problem?
Viewing 5 replies - 1 through 5 (of 5 total)
* Plugin Author [Optimizing Matters](https://wordpress.org/support/users/optimizingmatters/)
* (@optimizingmatters)
* [5 years, 11 months ago](https://wordpress.org/support/topic/inline-and-defer-css-10/#post-13005766)
* well, if you look at the HTML of the homepage of multisite sites, do you see
the critical CSS in there and is all other CSS preloaded?
* Thread Starter [jaromt](https://wordpress.org/support/users/jaromt/)
* (@jaromt)
* [5 years, 11 months ago](https://wordpress.org/support/topic/inline-and-defer-css-10/#post-13005979)
* Yes, there is
``
- This reply was modified 5 years, 11 months ago by [jaromt](https://wordpress.org/support/users/jaromt/).
* Plugin Author [Optimizing Matters](https://wordpress.org/support/users/optimizingmatters/)
* (@optimizingmatters)
* [5 years, 11 months ago](https://wordpress.org/support/topic/inline-and-defer-css-10/#post-13006150)
* OK, in GPSI, does it still list “render blocking resources” and if so, which
ones? JS-files maybe?
* Thread Starter [jaromt](https://wordpress.org/support/users/jaromt/)
* (@jaromt)
* [5 years, 11 months ago](https://wordpress.org/support/topic/inline-and-defer-css-10/#post-13008018)
* Yes, it still lists Eliminate render-blocking resources but only jquery and 1
other js file.
* Plugin Author [Optimizing Matters](https://wordpress.org/support/users/optimizingmatters/)
* (@optimizingmatters)
* [5 years, 11 months ago](https://wordpress.org/support/topic/inline-and-defer-css-10/#post-13008035)
* well, inline-and-defer is for CSS, so you’ll have to find a way to make those
JS-files not render-blocking. for jQuery you could try to remove it from AO’s
JS optimization exclusion list (and test to see if it works). for the other JS-
file you could try asyncing it by adding it to the “async javascript” option
on AO’s “Extra” tab.
Viewing 5 replies - 1 through 5 (of 5 total)
The topic ‘Inline and defer CSS’ is closed to new replies.
* 
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* 5 replies
* 2 participants
* Last reply from: [Optimizing Matters](https://wordpress.org/support/users/optimizingmatters/)
* Last activity: [5 years, 11 months ago](https://wordpress.org/support/topic/inline-and-defer-css-10/#post-13008035)
* Status: resolved