Title: FOUC, require criticalcss.com?
Last modified: April 9, 2019

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# FOUC, require criticalcss.com?

 *  [Rookie](https://wordpress.org/support/users/alriksson/)
 * (@alriksson)
 * [7 years, 2 months ago](https://wordpress.org/support/topic/fouc-require-criticalcss-com/)
 * I also see FOUC [https://wordpress.org/support/topic/fouc-happens/](https://wordpress.org/support/topic/fouc-happens/)
 * But might be due to that I use default CCSS form WP rocket and not the api from
   criticalcss.com? Since it flicks before the preloader starts to cover the page
   so the user actually sees this FOUC.

Viewing 2 replies - 1 through 2 (of 2 total)

 *  Plugin Author [Derrick Hammer](https://wordpress.org/support/users/pcfreak30/)
 * (@pcfreak30)
 * [7 years, 2 months ago](https://wordpress.org/support/topic/fouc-require-criticalcss-com/#post-11408604)
 * I have not tested the wp-rocket criticalcss and the preloader compatibility is
   targeted at my wp criticalcss plugin as well. I recommend using it and if you
   still have issues I can try to help.
 *  Thread Starter [Rookie](https://wordpress.org/support/users/alriksson/)
 * (@alriksson)
 * [7 years, 2 months ago](https://wordpress.org/support/topic/fouc-require-criticalcss-com/#post-11409708)
 * Ok I will give it a try with your critical css plugin together with criticalcss.
   com’s API and see if the FOUC issue remains.

Viewing 2 replies - 1 through 2 (of 2 total)

The topic ‘FOUC, require criticalcss.com?’ is closed to new replies.

 * ![](https://s.w.org/plugins/geopattern-icon/rocket-async-css.svg)
 * [WP Rocket ASYNC CSS](https://wordpress.org/plugins/rocket-async-css/)
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 * 2 replies
 * 2 participants
 * Last reply from: [Rookie](https://wordpress.org/support/users/alriksson/)
 * Last activity: [7 years, 2 months ago](https://wordpress.org/support/topic/fouc-require-criticalcss-com/#post-11409708)
 * Status: not resolved