Pattern CSS – The CSS Editor For Blocks

1.5.6 – 2026-04-11

• Removes class ID from block when CSS is cleared

1.5.5 – 2026-03-24

• Added manual class ID override (opt-in via constant)
• Warns when duplicate class IDs are detected in the editor
• Prevents duplicate inline styles on the frontend
• Switched to Biome for linting and formatting
• Switched to Playwright and WP Playground for testing

1.5.4 – 2026-03-23

• Fixed dynamic blocks with POST

1.5.3 – 2025-09-27

• Fixes an issue where filtered attributes sent wp/v2/block-renderer causes a block validation error

1.5.2 – 2025-05-21

• Fixes an overflow bug in the editor

1.5.1 – 2025-05-18

• Retagging for release

1.5.0 – 2025-05-18

• Adds support for global styles via a new editor

1.4.0 – 2025-05-12

• Adds a draggable, resizable popout mode
• Updates CSS engine to include recent CSS features
• Allows “supports” support scoped to the block

1.3.0 – 2025-01-27

• Switches to useStyleOverride for injecting styles

1.2.6 – 2024-09-20

• Removes an unecessary html escape that mangled some css.

1.2.5 – 2024-07-28

• Fixed a small bug where a block may not have attributes when we access them.

1.2.4 – 2024-07-21

• Renamed the panel to Pattern CSS to differenciate it from the core panel on FSE

1.2.3 – 2024-05-09

• Removed globals like @import, @font-face, and @keyframes (and others)

1.2.2 – 2024-04-19

• Fixed an issue where CSS media queries using <= were stripped out
• Removed loading the viewer for users without the edit_css cap
• Removed the tag stripping output – now only privlidged users can use
• Updated tests to run on modern WP (by disabling the iframe)

1.2.1 – 2024-02-22

• Removed the example code and added a useful default
• Render blocks now work – now adds the id to the main class list

1.2.0 – 2024-02-20

• Feature: Adds support for CSS nesting
• Removes the code example on focus and adds it back on blur (if empty)
• Lets users define an additional block selector
• Adds a notice that the site logo isn’t currently supported

1.1.0 – 2024-02-18

• Prevent adding classes to blocks unless CSS is added
• Force the settings area to the bottom (mainly for custom blocks)

1.0.1 – 2023-11-04

• Fixed a bug where the it would crash on the pattern manager page

1.0.0 – 2023-07-15

• Feature: Now supports reusable blocks/patterns
• Update: Removed the “per page” functionality to limit the scope of this plugin to blocks and reusable patterns only
• Performance: Added global loading strategy to prevent per block n+1 loading issues
• Improvement: Added the option to update the CSS selector used for scoping (useful for duplicating blocks)
• Improvement: Added some examples when no CSS is present
• Improvement: Removed the public className attribute requirement from the Additional Settings area
• Improvement: Instead of saving as meta on a post, it now pulls from the attribute directly during page load (via the pre_render_block filter).
• Fix: Now it will only show on post types with the public setting set to true