Title: Blocks CSS: CSS Editor for Gutenberg Blocks Author: Hardeep Asrani Published: 14 Febrewaris, 2019 Last modified: 29 Septimber, 2026 --- Search plugins ![](https://ps.w.org/blocks-css/assets/banner-772x250.jpg?rev=2030330) ![](https://ps.w.org/blocks-css/assets/icon-256x256.jpg?rev=2030330) # Blocks CSS: CSS Editor for Gutenberg Blocks Troch [Hardeep Asrani](https://profiles.wordpress.org/hardeepasrani/) [Download](https://downloads.wordpress.org/plugin/blocks-css.3.2.7.zip) * [Details](https://fy.wordpress.org/plugins/blocks-css/#description) * [Resinsjes](https://fy.wordpress.org/plugins/blocks-css/#reviews) * [Ûntwikkeling](https://fy.wordpress.org/plugins/blocks-css/#developers) [Stypje](https://wordpress.org/support/plugin/blocks-css/) ## Beskriuwing Blocks CSS allows you add custom CSS to your Blocks straight from the Block Editor( Gutenberg). It adds a syntax-highlighted CSS Editor where you can add additional CSS to your Gutenberg Blocks to style them the way you want. All the code and sources for this plugin are publicly available as part of https:// github.com/Codeinwp/otter-blocks. ## Skermôfbyldings [⌊CSS Editor⌉⌊CSS Editor⌉[ CSS Editor [⌊CSS Editor⌉⌊CSS Editor⌉[ CSS Editor ## Resinsjes ![](https://secure.gravatar.com/avatar/2e30329ab3220e0cf929fe14c6efe89bed6c64d148c584e805618d4425862c04? s=60&d=retro&r=g) ### 󠀁[Indispensable!](https://wordpress.org/support/topic/indispensable-272/)󠁿 [maltmann](https://profiles.wordpress.org/maltmann/) 8 Febrewaris, 2026 1 reakce Works like a charm on any of my recent WP projects. [EDIT]I need to change my review. On some setups, I get two CSS editors shown in the "Custom CSS" attribute panel, and only contents of the second instance are getting saved.Problem:Two CodeMirror editors are displayed in the Custom CSS panel of the Blocks CSS plugin instead of one. Both editors are located in the same container. Assumed Root Cause:WordPress enables React StrictMode by default in the Block Editor. React StrictMode runs useEffect hooks twice to detect potential side effects. Analysis:The Blocks CSS plugin initializes CodeMirror in a useEffect hook.Since this useEffect doesn't have a cleanup function that checks whether CodeMirror is already initialized, wp.CodeMirror() is called again on every mount cycle. With StrictMode enabled, this means: twice on the same DOM element. Probable Solution:The useEffect hook should implement a cleanup function that prevents CodeMirror from being initialized multiple times on the same element. Side Notes:This only happens in some of my setups. I couldn't figure out any possibly conflicting theme, plugin or code snippet. So I assume it might be something like a timing issue. Conclusion:I won't change the 5-star rating, because despite of this problem the plugin does its job. And I know how to handle this issue by a simple CSS rule to hide all Block CSS CodeMirrors except the last one:#o-css-editor .CodeMirror: not(:last-child) { display: none;} ![](https://secure.gravatar.com/avatar/6cbd96106c76dfd85e755f1aba9c463817d1b9d5dd74bb64b84dad2b458a790c? s=60&d=retro&r=g) ### 󠀁[Отличный плагин](https://wordpress.org/support/topic/%d0%be%d1%82%d0%bb%d0%b8%d1%87%d0%bd%d1%8b%d0%b9-%d0%bf%d0%bb%d0%b0%d0%b3%d0%b8%d0%bd-991/)󠁿 [Сергей](https://profiles.wordpress.org/serzh82/) 20 Novimber, 2025 1 reakce Отличный плагин ![](https://secure.gravatar.com/avatar/ff57a8df8c1ffea97f5c0992bed6943b19a831dbc8b3a0f9153dc4421fa1c4cc? s=60&d=retro&r=g) ### 󠀁[Моя оценка: пять звезд](https://wordpress.org/support/topic/%d0%bc%d0%be%d1%8f-%d0%be%d1%86%d0%b5%d0%bd%d0%ba%d0%b0-%d0%bf%d1%8f%d1%82%d1%8c-%d0%b7%d0%b2%d0%b5%d0%b7%d0%b4/)󠁿 [shooter604](https://profiles.wordpress.org/shooter604/) 14 Novimber, 2025 1 reakce Очень классные возможности! Пользуюсь постоянно! ![](https://secure.gravatar.com/avatar/5a04f5d680efd2cb46cc23d68d1e4d7c94f7e4e910dd0b60c54ebd63861e1785? s=60&d=retro&r=g) ### 󠀁[The Other Review Titles Say It All](https://wordpress.org/support/topic/the-other-review-titles-say-it-all/)󠁿 [someguy42](https://profiles.wordpress.org/someguy42/) 24 July, 2024 1 reakce "Essential, Useful Tool, Completes the Block Editor, Should be part of the core," The one thing they don't mention is how quick and genuinely concerned the support is. ![](https://secure.gravatar.com/avatar/fc490c401adf61289262192824d444a5f47939eb723b3ccc8ce7c73065cb7c0f? s=60&d=retro&r=g) ### 󠀁[Simple and great plugin!](https://wordpress.org/support/topic/simple-and-great-plugin-36/)󠁿 [Andreslav](https://profiles.wordpress.org/andreslav/) 4 Oktober, 2023 1 reakce Does exactly what I need it to do. ![](https://secure.gravatar.com/avatar/947be7e3fe72d711a506739fa280376b9985c11cc9005f1b6ae2eedece99d515? s=60&d=retro&r=g) ### 󠀁[Completes Block Editor](https://wordpress.org/support/topic/completes-block-editor/)󠁿 [Masud Rana](https://profiles.wordpress.org/yeelloo/) 26 Septimber, 2023 1 reakce Can't think of Block Editor without this. Tiny powerful thing. Only thing I hate in this plugin is the following line: $render_css = empty( $file_name ) || strpos( $file_name, 'post-v2' ) === false; This means if you deactivate Otter, your content might just break 🙁 [ Lês alle 25 resinsjes ](https://wordpress.org/support/plugin/blocks-css/reviews/) ## Meiwurkers & amp; Untwikkelders “Blocks CSS: CSS Editor for Gutenberg Blocks” is iepen boarne software. De folgjende minsken hawwe bydroegen oan dizze plugin. Meiwurkers * [ Hardeep Asrani ](https://profiles.wordpress.org/hardeepasrani/) * [ Themeisle ](https://profiles.wordpress.org/themeisle/) “Blocks CSS: CSS Editor for Gutenberg Blocks” is oerset yn 11 lokaasjes. Tank oan [de oersetters](https://translate.wordpress.org/projects/wp-plugins/blocks-css/contributors) foar harren bydragen. [Oersette “Blocks CSS: CSS Editor for Gutenberg Blocks” yn jo taal.](https://translate.wordpress.org/projects/wp-plugins/blocks-css) ### Ynteressearre yn ûntwikkeling? [Blêdzje troch de koade](https://plugins.trac.wordpress.org/browser/blocks-css/), besjoch de [SVN-repository](https://plugins.svn.wordpress.org/blocks-css/) , of abonnearje op it [ûntwikkelingslogboek](https://plugins.trac.wordpress.org/log/blocks-css/) troch [RSS](https://plugins.trac.wordpress.org/log/blocks-css/?limit=100&mode=stop_on_copy&format=rss). ## Feroaringslog You can check the changelog [here.](https://github.com/Codeinwp/otter-blocks/blob/master/CHANGELOG.md) ## Meta * Version **3.2.7** * Last updated **1 wike yn ôl** * Active installations **5.000+** * WordPress version ** 6.6 of heger ** * Tested up to **7.0.7** * PHP version ** 5.4 of heger ** * Languages * [Arabic](https://ar.wordpress.org/plugins/blocks-css/), [Chinese (Taiwan)](https://tw.wordpress.org/plugins/blocks-css/), [Dutch](https://nl.wordpress.org/plugins/blocks-css/), [Dutch (Belgium)](https://nl-be.wordpress.org/plugins/blocks-css/), [English (US)](https://wordpress.org/plugins/blocks-css/), [French (Canada)](https://fr-ca.wordpress.org/plugins/blocks-css/), [German](https://de.wordpress.org/plugins/blocks-css/), [German (Switzerland)](https://de-ch.wordpress.org/plugins/blocks-css/), [Hebrew](https://he.wordpress.org/plugins/blocks-css/), [Russian](https://ru.wordpress.org/plugins/blocks-css/), [Spanish (Spain)](https://es.wordpress.org/plugins/blocks-css/), en [Swedish](https://sv.wordpress.org/plugins/blocks-css/). * [Oersette yn jo taal](https://translate.wordpress.org/projects/wp-plugins/blocks-css) * Tags * [block-editor](https://fy.wordpress.org/plugins/tags/block-editor/)[css editor](https://fy.wordpress.org/plugins/tags/css-editor/) [custom css](https://fy.wordpress.org/plugins/tags/custom-css/)[design](https://fy.wordpress.org/plugins/tags/design/) [gutenberg](https://fy.wordpress.org/plugins/tags/gutenberg/) * [Avansearre werjefte](https://fy.wordpress.org/plugins/blocks-css/advanced/) ## Wurdearrings 4.9 fan 5 stjerren. * [ 23 resinsjes mei 5 stjerren ](https://wordpress.org/support/plugin/blocks-css/reviews/?filter=5) * [ 1 resinsje mei 4 stjer ](https://wordpress.org/support/plugin/blocks-css/reviews/?filter=4) * [ 1 resinsje mei 3 stjer ](https://wordpress.org/support/plugin/blocks-css/reviews/?filter=3) * [ 0 resinsjes mei 2 stjerren ](https://wordpress.org/support/plugin/blocks-css/reviews/?filter=2) * [ 0 resinsjes mei 1 stjerren ](https://wordpress.org/support/plugin/blocks-css/reviews/?filter=1) [Your review](https://wordpress.org/support/plugin/blocks-css/reviews/#new-post) [See all reviews](https://wordpress.org/support/plugin/blocks-css/reviews/) ## Meiwurkers * [ Hardeep Asrani ](https://profiles.wordpress.org/hardeepasrani/) * [ Themeisle ](https://profiles.wordpress.org/themeisle/) ## Stypje Problemen oplost yn 'e lêste twa moannen: 1 fan 1 [Besjoch stipefoarum](https://wordpress.org/support/plugin/blocks-css/)