The WordPress coreCoreCore is the set of software required to run WordPress. The Core Development Team builds WordPress. development team builds WordPress! Follow this site for general updates, status reports, and the occasional code debate. There’s lots of ways to contribute:
Found a bugbugA bug is an error or unexpected result. Performance improvements, code optimization, and are considered enhancements, not defects. After feature freeze, only bugs are dealt with, with regressions (adverse changes from the previous version) being the highest priority.?Create a ticket in the bug tracker.
“What’s new in GutenbergGutenbergThe Gutenberg project is the new Editor Interface for WordPress. The editor improves the process and experience of creating new content, making writing rich content much simpler. It uses ‘blocks’ to add richness rather than shortcodes, custom HTML etc.
https://wordpress.org/gutenberg/…” posts (labeled with the #gutenberg-new tag) are posted following every Gutenberg release on a biweekly basis, showcasing new features included in each release. As a reminder, here’s an overview of different ways to keep up with Gutenberg and the Editor.
Gutenberg 23.4 brings resilient media uploads, continued media editor refinements, visual updates for the Site Editor and experimental dashboard, new Grid transforms, and developer-facing improvements for DataViews and design-system foundations and a whole lot more. Thanks to everyone who contributed to the release.
Preparing WordPress for ReactReactReact is a JavaScript library that makes it easy to reason about, construct, and maintain stateless and stateful user interfaces.
https://reactjs.org 19
23.4 introduces a new experimental flag that can register version 19 of React runtime scripts: react, react-dom, and react-jsx-runtime. This gives developers a way to test plugins, themes, blocks, and editor integrations against the React 19 runtime before it becomes the default (#79077, #78685, #79142). To test, head to the experiments page /wp-admin/admin.php?page=experiments-wp-admin and activate the “React 19” experiment.
Tips for testing: Although React 18 and 19 APIs are practically identical, there are some runtime incompatibilities that had to be resolved with an additional compatibility layer. When testing a pluginPluginA plugin is a piece of software containing a group of functions that can be added to a WordPress website. They can extend functionality or add new features to your WordPress websites. WordPress plugins are written in the PHP programming language and integrate seamlessly with WordPress. These can be free in the WordPress.org Plugin Directory https://wordpress.org/plugins/ or can be cost-based plugin from a third-party. or theme with the React 19 experiment, developers should pay close attention to any warnings and console errors. Test all custom adminadmin(and super admin) pages that your plugin registers and that use React. Test everything in the editor UIUIUser interface that uses refs, ref callbacks, portals, or third-party component libraries. Review your build pipeline to check that usages of react/jsx-runtime link to the externalized WordPress script instead of bundling it.
The Site Editor follows your admin color scheme
The Site Editor sidebarSidebarA sidebar in WordPress is referred to a widget-ready area used by WordPress themes to display information that is not a part of the main content. It is not always a vertical column on the side. It can be a horizontal rectangle below or above the content area, footer, header, or any where in the theme. and page shell now follow the user’s WordPress admin color scheme instead of always using a fixed dark background. This brings the Site Editor chrome closer to the rest of the admin experience across color schemes (#78397).
Media
The media editor modal received a round of usability and design improvements. Editable attachment fields appear at the top of the details panel (#78896, #78792). The mobile toolbar has been updated to include aspect ratio control, zoom uses plus and minus buttons (#78935, #78928, #79011, #79024).
Client-side media processing introduced an upload progress snackbar to the BlockBlockBlock is the abstract term used to describe units of markup that, composed together, form the content or layout of a webpage using the WordPress editor. The idea combines concepts of what in the past may have achieved with shortcodes, custom HTML, and embed discovery into a single consistent API and user experience. Editor, including batch upload counts (#77249). The upload queue will pause while offline, resuming automatically when the connection returns (#76765).
Columns and Gallery blocks can transform into grid layouts
Block transforms can now target a specific variation of another block. In practice, this enables new transforms from Columns and Gallery blocks into a Grid variation, preserving content while changing the layout type (#78713).
Other notable highlights
UltraHDR image support — UltraHDR JPEGs are detected during upload, originals are kept unmodified, and resized sub-sizes preserve the ISO 21496-1 gain map (#74873).
New Dashboard experience experiment — A new Events widgetWidgetA WordPress Widget is a small block that performs a specific function. You can add these widgets in sidebars also known as widget-ready areas on your web page. WordPress widgets were originally created to provide a simple and easy-to-use way of giving design and structure control of the WordPress theme to the user. for upcoming WordPress community events was added (#78553), as well as a responsive grid columns with container breakpoints (#78732).
DataViews configuration becomes filterable —A new filterable APIAPIAn API or Application Programming Interface is a software intermediary that allows programs to interact with each other and share data in limited, clearly defined ways. extracts entity view configuration out of the REST controller and into a reusable function (#78977).
Playlist block — Adds a visualization style selector for waveform styles, plus a track length setting (#76147, #78954).
Login/out block — This block can now be inserted inside the Navigation Submenu block (#75497).
Block transforms — For transforms, you can target a variation of another block (#78713).
Real time collaboration (RTC) reliability work — RTC shipped improvements including a separate document persistence endpoint, collaborator overlay rerenders, polling improvements, forbidden room handling, CRDT typing fixes, and undo manager fixes (#78891, #78636, #78811, #78748, #78756, #78864).
Revert client-side media processing plugin-only gate. (76751)
Enhancements
Tooltip migrationMigrationMoving the code, database and media files for a website site from one server to another. Most typically done when changing hosting companies.: Boot consumers + shell-level Tooltip.Provider (5/5). (78692)
UI: Tooltip.Provider — forward upstream closeDelay and timeout props. (78642)
Upload Media: Add retry with exponential backoff and networknetwork(versus site, blog) resilience. (76765)
Use search_columns=post_title for parent page selector REST APIREST APIThe REST API is an acronym for the RESTful Application Program Interface (API) that uses HTTP requests to GET, PUT, POST and DELETE data. It is how the front end of an application (think “phone app” or “website”) can communicate with the data store (think “database” or “file system”)
https://developer.wordpress.org/rest-api/ searches. (78683)
Data Layer
RTC: Add separate doc persistence endpoint. (78891)
RTC: Re-render collaborators overlay when the block tree changes. (78636)
Maintain absolute stroke-width regardless of icon-size. (78774)
Font Library
Fix Update button staying active when changes are reverted. (78567)
Client Side Media
Extract entity view configuration into a filterable API. (78977)
New APIs
Extensibility
Extract entity view configuration into a filterable API. (78977)
Bug Fixes
Build: Document the hooksHooksIn WordPress theme and development, hooks are functions that can be applied to an action or a Filter in WordPress. Actions are functions performed when a certain event occurs in WordPress. Filters allow you to modify certain functions. Arguments used to hook both filters and actions look the same. generated by the wp-build page templates. (78826)
Scripts: Use require.resolve for SVG webpack loaders to fix pnpm compatibility. (78777)
[Content Types]: Fix extra Page padding causing vertical scrollbar. (78661)
env: Replace extract-zip with adm-zip to fix hang on Node 24.16. (78828)
wp-build: Fix black flash on wp-admin pages before hydration. (78493)
Block Library
Common CSS: Avoid false-positive border-style on custom properties. (77476)
Fix playlist metadata edits recreating player. (78876)
Fix type of $block_instance parameter in block_core_image_render_lightbox(). (78790)
Paragraph: Strip stale block-support classes from className during align attribute migration. (78731)
Prevent font-size propagation in Navigation items causing em compounding. (77419)
ShortcodeShortcodeA shortcode is a placeholder used within a WordPress post, page, or widget to insert a form or function generated by a plugin in a specific location on your site. block: Fix editor crash when selecting transform menu. (78770)
Writing flow: Delete at end of nested list item should merge into next block. (78742)
Image block: Don’t show crop icon while image is uploading. (79103)
Media
Media Editor: Fix media editor sidebar close button label. (78895)
Media Editor: Fix sidebar overflowing the modal between the small and medium breakpoints. (78931)
Media Editor: Keep crop handles operable on large images. (79011)
Media Editor: Remove lag when toggling the sidebar. (79024)
Elements: Align class name parsing with custom CSS implementation. (79023)
Elements: Guard against non-string className in render filterFilterFilters are one of the two types of Hooks https://codex.wordpress.org/Plugin_API/Hooks. They provide a way for functions to modify data of other functions. They are the counterpart to Actions. Unlike Actions, filters are meant to work in an isolated manner, and should never have side effects such as affecting global variables and output.. (78841)
Preserve nested list when deleting a selection across sibling list items. (78776)
Client Side Media
Media: Skip cross-origin isolation on the classic-theme site editor home route. (78404)
Upload Media: Gate very large images out of client-side processing. (78949)
Plugin
Fix Gutenberg plugin assuming its directory is named “gutenberg”. (78705)
Fix experiments page form layout with box-sizing and width. (78910)
Data Layer
RTC: Fix CRDT deferred updates resulting in jumbled typing. (78756)
RTC: Fix Yjs undo manager to update UI state when undo stack changes. (78864)
Post Editor
Editor: Fix keyboard activation of the template actions preview. (78641)
Notes: Show default avatarAvatarAn avatar is an image or illustration that specifically refers to a character that represents an online user. It’s usually a square box that appears next to the user’s name. in the indicator when user avatars are disabled. (78849)
Connectors screen
Fix: Block auto-complete for AI API Keys in Connectors. (78946)
Icons
Revert “Icons: Maintain absolute stroke-width regardless of icon-size (#78774)”. (78854)
Dashboard
Fix Add widget error on non-secure HTTPHTTPHTTP is an acronym for Hyper Text Transfer Protocol. HTTP is the underlying protocol used by the World Wide Web and this protocol defines how messages are formatted and transmitted, and what actions Web servers and browsers should take in response to various commands. origins. (78850)
Block API
Block Visibility: Keep hide-everywhere working after a block opts out of visibility support. (78780)
AccessibilityAccessibilityAccessibility (commonly shortened to a11y) refers to the design of products, devices, services, or environments for people with disabilities. The concept of accessible design ensures both “direct access” (i.e. unassisted) and “indirect access” meaning compatibility with a person’s assistive technology (for example, computer screen readers). (https://en.wikipedia.org/wiki/Accessibility)
Boot navigation: Wrap items in a list role for valid listitem semantics. (78829)
Block Editor
Inserter: Fix error being thrown for spoken message when inserting default/direct block. (79004)
Block Library
Navigation Link: Fix duplicate block htmlHTMLHyperText Markup Language. The semantic scripting language primarily used for outputting content in web browsers. attributes in editor. (78973)
Patterns
Fix focus loss when closing the Create pattern dialog from the block toolbar. (78957)
DataViews: Add DataViews components to components manifest. (78960)
Docs: Auto-generate per-block API reference pages from block.jsonJSONJSON, or JavaScript Object Notation, is a minimal, readable format for structuring data. It is used primarily to transmit data between a server and web application, as an alternative to XML.. (77612)
Docs: Fix stale, incorrect, or missing documentation. (78686)
Docs: Remove stale mobile references from tooling and primitives documentation. (79041)
Format Library: Migrate to recommended @wordpress/ui components. (79059)
Framework: Remove invalidinvalidA resolution on the bug tracker (and generally common in software development, sometimes also notabug) that indicates the ticket is not a bug, is a support request, or is generally invalid. stale nested npm package references. (79014)
Make @wordpress/nux a no-op compatibility package. (77773)
Remove migrated dependencies from root package.json. (78813)
Tools: Migrate docs/tool into tools/docs workspace. (78870)
Block Library
Fix sprintf format specifiers in post-date and read-more blocks. (78933)
Fix: Escape URLs in block render functions using esc_url(). (78912)
Refactor workspace configuration for Babel dependencies. (78974)
Revert navigation morph & playlist commits pushed directly to trunktrunkA directory in Subversion containing the latest development code in preparation for the next major release cycle. If you are running "trunk", then you are on the latest revision.. (78857)
RichText: Remove dead native-only prop filtering. (79037)
Refactor: Remove jest/test deps from root package.json. (78801)
Remove React Native implementation, framework, and dependencies. (78747)
Post Editor
Editor: Refactor ‘PostPublishButton’ into function component. (78737)
Editor: Remove dead native guard in block removal warnings. (79039)
Post RevisionsRevisionsThe WordPress revisions system stores a record of each saved draft or published update. The revision system allows you to see what changes were made in each revision by dragging a slider (or using the Next/Previous buttons). The display indicates what has changed in each revision.: Upgrade diff from v4 to v8. (77992)
TypeScript: Migrate server-side-render package to TS. (71383)
Remove orphaned mobile bugbugA bug is an error or unexpected result. Performance improvements, code optimization, and are considered enhancements, not defects. After feature freeze, only bugs are dealt with, with regressions (adverse changes from the previous version) being the highest priority. report issue template. (79038)
Update AGENTS.md to mention additional pitfalls. (78718)
Update CODEOWNERS for tooling directories. (78874)
Build Tooling
Build Scripts: Fix Windows path handling in dev script. (78939)
CI: Skip plugin repo release when SVNSVNSubversion, the popular version control system (VCS) by the Apache project, used by WordPress to manage changes to its codebase.tagtagA directory in Subversion. WordPress uses tags to store a single snapshot of a version (3.6, 3.6.1, etc.), the common convention of tags in version control systems. (Not to be confused with post tags.) already exists. (78476)
Lint dependency version consistency with Syncpack. (77950)
Release: Drop mobile-specific changelog omit rules. (79042)
Skip including inactive or experimental routes when building for WordPress CoreCoreCore is the set of software required to run WordPress. The Core Development Team builds WordPress.. (76715)
feat: Migrate performance results to tools release. (78761)
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