Fix: Delete key on empty heading transforms following paragraph into heading by coderGtm · Pull Request #78779 · WordPress/gutenberg

coderGtm · 2026-05-28T13:46:41Z

What?

Fix a bug where pressing Delete on an empty heading block incorrectly transforms the following paragraph block into a heading.

Why?

When a heading block is emptied and the user presses Delete, the expected behaviour is that the empty heading is removed and the paragraph below is left unchanged. Instead, the paragraph was being converted into a heading — matching the type of the block that was being deleted.

This only occurred with the Delete key (forward merge). Backspace was unaffected because pressing Backspace on an empty heading with no preceding block triggers switchToDefaultOrRemove(), which converts the heading itself to a paragraph without ever reaching the merge path.

How?

The bug was in the mergeBlocks action (packages/block-editor/src/store/actions.js). When mergeBlocks(blockA, blockB) is called, blockA's type is preserved and blockB's content is merged in. Two existing guard conditions short-circuit this behaviour:

isUnmodifiedDefaultBlock(blockA) → removes blockA (handles an empty default/paragraph block)
isUnmodifiedDefaultBlock(blockB) → removes blockB (handles an empty following block)

Neither condition matched for an empty heading (blockA) above a paragraph with content (blockB): a heading is not the default block type, so the first check failed, and the paragraph had content, so the second also failed. The code then fell through to the merge logic, which calls switchToBlockType(blockB, blockA.name) — transforming the paragraph into a heading before merging.

The fix adds a new guard: if blockA has a merge function but its content-role attributes are empty (isUnmodifiedBlock(blockA, 'content')), simply remove blockA and focus blockB instead of merging. A unit test covering this case is included.

Testing Instructions

Open a post or page in the block editor.
Insert a Heading block and type any text (e.g. "My Heading").
Insert a Paragraph block below it and type any text (e.g. "My paragraph").
Click into the Heading block and select all the text (Cmd/Ctrl+A), then press Delete/Backspace to clear it. The heading block should now be empty.
With the cursor still in the empty heading block, press the Delete key (forward delete).
✅ Expected: The empty heading block is removed and the paragraph block below remains a paragraph with its content intact.
❌ Previous behaviour: The paragraph was converted into a heading.

Testing Instructions for Keyboard

Use Tab to navigate to the Heading block and Enter to begin editing.
Press Cmd/Ctrl+A to select all text, then Backspace to clear the heading content.
Press Delete (forward delete).
Confirm focus moves to the paragraph below and it remains a paragraph block (check the block type indicator in the toolbar).

Screenshots or screencast

Before	After
Screen.Recording.2026-05-28.at.7.24.19.PM.mov	Screen.Recording.2026-05-28.at.7.31.40.PM.mov

Use of AI Tools

This PR was developed with the assistance of GitHub Copilot (code exploration, fix implementation, and test authoring). The change was reviewed and verified manually.

github-actions · 2026-05-28T14:11:56Z

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If you're merging code through a pull request on GitHub, copy and paste the following into the bottom of the merge commit message.

Co-authored-by: coderGtm <gautam23@git.wordpress.org>
Co-authored-by: ellatrix <ellatrix@git.wordpress.org>
Co-authored-by: ntsekouras <ntsekouras@git.wordpress.org>
Co-authored-by: jasmussen <joen@git.wordpress.org>
Co-authored-by: youknowriad <youknowriad@git.wordpress.org>
Co-authored-by: Mustafabharmal <mustafabharmal@git.wordpress.org>

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jasmussen · 2026-05-29T10:50:24Z

Nice, thanks for the PR! Confirming it works for me, and I personally appreciate this a great deal as far as the writing experience.

Since this touches a sensitive part of the code, I will ultimately defer to developers familar with this code to approve or not. @ellatrix has worked a lot on writing flow.

youknowriad · 2026-06-09T11:44:46Z

Can you check the e2e test failures? It seems this could have introduced regressions on the list block no?

ntsekouras · 2026-06-09T14:36:32Z

+		// and keep blockB focused. Without this check, merging would transform
+		// blockB into blockA's type (e.g. paragraph → heading), which is
+		// unexpected when the leading block is simply empty.
+		if ( blockAType.merge && isUnmodifiedBlock( blockA, 'content' ) ) {


We probably need to check if blockA.name !== blockB.name and also it would be better to have the code below the if ( ! blockAType.merge ) { block for two reasons:

We remove the blockAType.merge check

Preserve the if ( isUnmodifiedDefaultBlock( blockB ) ) { block flow. Placement here changes the current behavior a bit right now and we can avoid it.

Thanks @ntsekouras! That actually is a better way. I made the change and tested the behaviour and It works flawlessly.

Failing list tests seem that something different (or more) is needed. --cc @ellatrix for any quick insights due to the heavy work on this area.

coderGtm · 2026-06-10T18:22:17Z

So I have fixed the logic and updated the test. There is still a keyboard testcase failing which I will try solving.

Backspace outdenting nested items is deliberate; changing it to merge with the previous sibling belongs in its own pull request with its own tests. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Batch the removal with the selection change, place the caret at the start of the surviving block, and leave selection alone when the merge was not triggered from the removed block. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

The removal path introduced for unmodified default blocks applies unchanged: an empty block of a different type adds nothing to the merge either. Folding also removes the block being deleted from rather than its empty follower when both are empty. The mocked store unit test gives way to end to end coverage. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

ellatrix

Rebased and redid this after #77525, switched to an e2e test instead of unit test.

A block without content attributes, like columns, counted as empty and was removed on Backspace instead of selected. Requiring a merge function keeps containers out of the removal path. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

@PARAM

This updates the pinned commit hash of the Gutenberg repository from `ae8b34d78e1abc6d1c866fdc00080a1452de82ad ` (version `23.8.0`) to `658c8cbe89db5d90279051d3bb816ca210fe4646` (version `23.9.0`). A full list of changes included in this commit can be found on GitHub: https://github.com/WordPress/gutenberg/compare/v23.8.0..v23.9.0. - Env: Update git to latest commit when `--update` passed (WordPress/gutenberg#81447) - InputControl: Vertically center date and time input values in Safari (WordPress/gutenberg#81361) - DataViews: vendor `ValidatedComboboxControl` (WordPress/gutenberg#81449) - Icon: Fix margin being applied twice in the editor (WordPress/gutenberg#81292) - Docs: Add Background image control Readme (WordPress/gutenberg#69409) - Dimensions: Fix aspect ratio and scale controls not reflecting external updates (WordPress/gutenberg#80747) - DataViews: vendor `ValidatedFormTokenField` (WordPress/gutenberg#81451) - Docs: Fix dead link in the dynamic blocks tutorial (WordPress/gutenberg#81399) - DataViews: vendor `ValidatedToggleGroupControl` (WordPress/gutenberg#81450) - Update 23.8 release changes on trunk (WordPress/gutenberg#81485) - Adds README for inspector-controls-tabs component (WordPress/gutenberg#69072) - BlockEditVisuallyButton: Update Developer Documentation (WordPress/gutenberg#68987) - Storybook: Upgrade Vite to 8 (WordPress/gutenberg#81494) - Packages: Move unreleased changelog entries out of the 23.8 published versions (WordPress/gutenberg#81502) - Theme: Avoid root-level relational selectors (WordPress/gutenberg#81457) - Theme: Move changelog entry to unreleased (WordPress/gutenberg#81508) - Admin UI: Add Navigation component and Page navigation slot (WordPress/gutenberg#79746) - Editor: Correctly mark ToolsMoreMenuGroup as a private SlotFill (WordPress/gutenberg#81503) - Fix: Term Description block skips display filters inside Terms Query. 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Docs: Align @PARAM tag columns in test/ docblocks (WordPress/gutenberg#81905) - Hide layout panel when no controls are available (WordPress/gutenberg#81968) - UI: Add ValidatedInputControl component (WordPress/gutenberg#81627) - Components: migrate StyledLabel to SCSS module (WordPress/gutenberg#80001) - fix: Button rtl loader issue (WordPress/gutenberg#81901) - Theme: Update Terrazzo packages to 2.7.1 (WordPress/gutenberg#81978) - CollapsibleCard: Support multiple header descriptions (WordPress/gutenberg#81227) - DataViews: use `Menu` from `@wordpress/ui` (WordPress/gutenberg#81783) - DataViews: Localize the date/datetime calendars from the site locale and direction (WordPress/gutenberg#81592) - Replace the Storybook test runner with the Vitest integration (WordPress/gutenberg#81918) - Block Editor: Don't close inserter panel when inline quick inserter opens (WordPress/gutenberg#76241) - Updated broken links in document files (WordPress/gutenberg#81961) - Boot: Mount the registered plugins (WordPress/gutenberg#81754) - Extensible Site Editor: Add a theme preview page with global styles editing (WordPress/gutenberg#81954) - Block Styles: Refactor the variation UI to use ui/Button (WordPress/gutenberg#81833) - Styles Route: Reference the api-fetch and html-entities projects (WordPress/gutenberg#81989) - Fix: Line Break Tags Added to Scripts and Styles (WordPress/gutenberg#77542) - Fix: skip empty block markup in navigation to prevent split UL elements (WordPress/gutenberg#78793) - Pattern List: Import a pattern from JSON (WordPress/gutenberg#81919) - UI: Add tooltips to Calendar and RangeCalendar navigation buttons (WordPress/gutenberg#81983) - UI: Add `ValidatedTextArea` control (WordPress/gutenberg#81984) - Fix: Responsive styles: When enabled and a font-size is setting, the corresponding CSS variable remains undefined (WordPress/gutenberg#81854) - Components: Migrate `TextareaControl` to SCSS module (WordPress/gutenberg#81353) - UI: Set Calendar text direction automatically (WordPress/gutenberg#81982) - Theme: Rename ThemeProvider wrapper CSS class from root to wrapper (WordPress/gutenberg#81996) - Editor: Offer the theme export from both site editors (WordPress/gutenberg#81992) - Fix: Stop stripping spaces inside inline HTML elements on paste (WordPress/gutenberg#76696) - DataViews: Add a lint rule preventing private API imports (WordPress/gutenberg#81478) - Components: Migrate ProgressBar styles from Emotion to SCSS module (WordPress/gutenberg#80512) - RTC: Disable syncing for unpersistable post types (WordPress/gutenberg#81946) - Boot: Restore centered snackbar notices (WordPress/gutenberg#81995) - BorderControl, BorderBoxControl: Migrate styles to CSS Modules (WordPress/gutenberg#80437) - Duotone Picker: Stop the duotone bar offering to move its control points (WordPress/gutenberg#81850) - DataViews: Add an aspect ratio toggle for grid layouts (WordPress/gutenberg#81604) - Remove `fixable` on `i18n-no-flanking-whitespace` (WordPress/gutenberg#70279) - Dynamic Gallery block: Skip transforms that expect inner blocks, e.g. Image and Grid transforms (WordPress/gutenberg#82009) - Accordion Heading: Route theme.json spacing to the toggle button (WordPress/gutenberg#81976) - Element: Serialize memo-wrapped components instead of an empty string (WordPress/gutenberg#81986) - Style: Update color to use CSS variable in global-styles-ui (WordPress/gutenberg#79053) - Dashboard Widgets: let the host decide which component renders an action link (WordPress/gutenberg#81740) - Tabs: make inactive panel content findable in page (WordPress/gutenberg#81743) - Border Panel: Fix incorrect panel label (WordPress/gutenberg#78830) - Components: Migrate ZStack styles from Emotion to SCSS module (WordPress/gutenberg#80514) - Storybook: Add missing @types/jest devDependency (WordPress/gutenberg#82017) - TypeScript: Drop redundant undefined casts for keyless entity record IDs (WordPress/gutenberg#82018) - Editor: Fix start page/template modal footer overflow (WordPress/gutenberg#82021) - Storybook: Keep Vitest story scanning independent of the Vite root (WordPress/gutenberg#82020) - Test: Port shared Vitest test environment (WordPress/gutenberg#81038) - Query No Results: Add Border & Spacing Support (WordPress/gutenberg#64601) - RadioControl: allow individual options to be disabled (WordPress/gutenberg#82026) - Components: Migrate `BoxControl` to SCSS module (WordPress/gutenberg#80715) - SearchableChipSelectControl: Add form control to @wordpress/ui (WordPress/gutenberg#80980) - UI: Move controlled prop guidance to contributing docs (WordPress/gutenberg#82044) - Components: Migrate Scrollable to SCSS module (WordPress/gutenberg#80694) - UI: Fix accessibility issues in form primitives and their stories (WordPress/gutenberg#81853) - UI: Align Calendar styling with WPDS tokens (WordPress/gutenberg#81438) - Calendar: Support custom root roles (WordPress/gutenberg#81443) - E2E Tests: Use str_starts_with()/str_contains() in hide-user-rest-routes plugin (WordPress/gutenberg#82030) - Site editor v2: Fix block error with navigation-edit route (WordPress/gutenberg#82051) - ActionItem: Move the more menu deduplication out of the Slot (WordPress/gutenberg#81507) - DataViews: Fix invisible sticky Actions column divider (WordPress/gutenberg#82055) - Quick draft: replace Button+Link with LinkButton (WordPress/gutenberg#82031) - Lint: Prevent private API imports in all bundled packages (WordPress/gutenberg#82015) - PaletteEdit: Expose palette swatches as command buttons (WordPress/gutenberg#82023) - Test: Add Vitest React, Emotion compilation, console, and snapshot parity (WordPress/gutenberg#81039) - remove dead class reference in quick-draft (WordPress/gutenberg#82064) - `InputControl`: Hide the value-like placeholder Safari renders in empty date and time inputs in `ui` and `components` packages (WordPress/gutenberg#81991) - Site editor v2: Fix template part list pagination and sorting (WordPress/gutenberg#82054) - Build: Fix ESM declaration resolution (WordPress/gutenberg#82022) - Core Data: Stop storing NaN pagination totals for unpaginated endpoints (WordPress/gutenberg#82059) - Dashboard widgets & Grid: use kebab-case for CSS selectors (WordPress/gutenberg#82053) - CI: Skip the package CHANGELOG check when only the CHANGELOG changed (WordPress/gutenberg#82069) - Menu: Close non-modal menus on iframe interaction (WordPress/gutenberg#81952) - Packages: Recover August 26 npm release metadata (WordPress/gutenberg#82086) - Private APIs: Add back '@wordpress/dataviews' to the allowed core modules (WordPress/gutenberg#82221) Fixes #66067. git-svn-id: https://develop.svn.wordpress.org/trunk@63535 602fd350-edb4-49c9-b593-d223f7449a82

@PARAM

This updates the pinned commit hash of the Gutenberg repository from `ae8b34d78e1abc6d1c866fdc00080a1452de82ad ` (version `23.8.0`) to `658c8cbe89db5d90279051d3bb816ca210fe4646` (version `23.9.0`). A full list of changes included in this commit can be found on GitHub: https://github.com/WordPress/gutenberg/compare/v23.8.0..v23.9.0. - Env: Update git to latest commit when `--update` passed (WordPress/gutenberg#81447) - InputControl: Vertically center date and time input values in Safari (WordPress/gutenberg#81361) - DataViews: vendor `ValidatedComboboxControl` (WordPress/gutenberg#81449) - Icon: Fix margin being applied twice in the editor (WordPress/gutenberg#81292) - Docs: Add Background image control Readme (WordPress/gutenberg#69409) - Dimensions: Fix aspect ratio and scale controls not reflecting external updates (WordPress/gutenberg#80747) - DataViews: vendor `ValidatedFormTokenField` (WordPress/gutenberg#81451) - Docs: Fix dead link in the dynamic blocks tutorial (WordPress/gutenberg#81399) - DataViews: vendor `ValidatedToggleGroupControl` (WordPress/gutenberg#81450) - Update 23.8 release changes on trunk (WordPress/gutenberg#81485) - Adds README for inspector-controls-tabs component (WordPress/gutenberg#69072) - BlockEditVisuallyButton: Update Developer Documentation (WordPress/gutenberg#68987) - Storybook: Upgrade Vite to 8 (WordPress/gutenberg#81494) - Packages: Move unreleased changelog entries out of the 23.8 published versions (WordPress/gutenberg#81502) - Theme: Avoid root-level relational selectors (WordPress/gutenberg#81457) - Theme: Move changelog entry to unreleased (WordPress/gutenberg#81508) - Admin UI: Add Navigation component and Page navigation slot (WordPress/gutenberg#79746) - Editor: Correctly mark ToolsMoreMenuGroup as a private SlotFill (WordPress/gutenberg#81503) - Fix: Term Description block skips display filters inside Terms Query. (WordPress/gutenberg#81290) - DataForm: Fix the datetime control sending two updates per calendar interaction (WordPress/gutenberg#81440) - Editor: Stop `:has()` selectors recalculating the whole document on every block selection (WordPress/gutenberg#81471) - Fix: getQueryArgs discards everything after the second = in a query argument value (WordPress/gutenberg#81066) - DOM: treat a caret at a soft line wrap as an ambiguous position in Firefox (WordPress/gutenberg#81003) - In-between indicator: make symmetric (WordPress/gutenberg#68074) - Fix: Delete key on empty heading transforms following paragraph into heading (WordPress/gutenberg#78779) - Media editor: keep initial modal focus on the dialog frame (WordPress/gutenberg#81541) - Writing flow: select next block on Enter key (WordPress/gutenberg#63484) - Media Editor Route Experiment: Override media edit links to point to the new experimental media editor (WordPress/gutenberg#81559) - DataViews: vendor `ValidatedToggleControl` (WordPress/gutenberg#81492) - Release: Improve changelog categorization (WordPress/gutenberg#81475) - Docs: Add Block Editing Mode Readme. (WordPress/gutenberg#69411) - Editor: Use PluginSidebar in GlobalStylesSidebar (WordPress/gutenberg#81570) - Docs: Fix broken links to the Block API reference guides. (WordPress/gutenberg#81571) - Adds JSdoc for `column` and `columns` block's edit.js (WordPress/gutenberg#68873) - Adds JSdoc for `audio` block's edit.js (WordPress/gutenberg#68865) - Refactor: Convert `createColorHOC` to functional component (WordPress/gutenberg#70408) - Adds JSdoc for `avatar` block's edit.js (WordPress/gutenberg#68867) - Editor: Speed up the hierarchical term selector for large taxonomies (WordPress/gutenberg#81376) - Extensible Site Editor: Preview the site on Home for classic themes (WordPress/gutenberg#81578) - TypeScript: Add typecheck script and split root tsconfig into build and dev solutions (WordPress/gutenberg#81499) - Packages: Split blob, grid, interactivity, and theme tsconfigs (WordPress/gutenberg#81509) - Vitest: Resolve @flakiness/vitest reporter to an absolute path (WordPress/gutenberg#81582) - Update waveform player dependency patch (WordPress/gutenberg#81454) - Dashboard Widgets: promote high-relevance actions into a chrome footer (WordPress/gutenberg#81556) - Extensible Site Editor: Gate theme screens on theme support (WordPress/gutenberg#81581) - Editor: Register the editor keyboard shortcuts from the provider (WordPress/gutenberg#81580) - Base styles: Streamline focus ring override (WordPress/gutenberg#81242) - Components: Align legacy form control focus rings with WPDS (WordPress/gutenberg#80417) - Base Styles: Align `input-control` mixin to design system (WordPress/gutenberg#81357) - Add Gutenberg version details for WordPress 7.1 (WordPress/gutenberg#81600) - Fix viewport state values set by grid resizer (WordPress/gutenberg#81601) - Block editor: add an inserter to the parent selector (WordPress/gutenberg#81532) - url: clamp the truncated file name slice in filterURLForDisplay (WordPress/gutenberg#81529) - Fix parent inserter alignment with text labels enabled (WordPress/gutenberg#81608) - URL: Stop normalizePath throwing on a malformed percent sequence (WordPress/gutenberg#81086) - Extensible Site Editor: Add the Identity route (WordPress/gutenberg#81576) - ComboboxControl: narrow `onChange` callback type to `string` | `null` (WordPress/gutenberg#81568) - Storybook: Add Story for URLPopup component (WordPress/gutenberg#68449) - Extensible Site Editor: Show only the style book on Styles for classic themes (WordPress/gutenberg#81579) - Global Styles: Expose additional elements in Typography and Colors (WordPress/gutenberg#80852) - Storybook: Add Story for BlockPopover (WordPress/gutenberg#68681) - Block Editor: Never spotlight blocks in a preview (WordPress/gutenberg#81615) - Boot: Let the editor canvas navigate between entity records (WordPress/gutenberg#81590) - Block API: Declare block keyboard shortcuts on variations and transforms (WordPress/gutenberg#81588) - Storybook: Add Story for InnerBlocks (WordPress/gutenberg#68651) - Boot: Translate the canvas click-to-edit label (WordPress/gutenberg#81620) - Perf: Report the first block selection as its own metric (WordPress/gutenberg#81616) - Boot: Contain a surface failure to that surface (WordPress/gutenberg#81622) - Boot: Warn before leaving with unsaved changes (WordPress/gutenberg#81625) - Env: Fall back to cached docker images when the registry is unreachable (WordPress/gutenberg#81631) - Editor: Refactor 'ErrorBoundary' to use the new recommended components (WordPress/gutenberg#81638) - Fix playlist track toolbar insertion (WordPress/gutenberg#81639) - Playlist Track: Show upload spinner inline (WordPress/gutenberg#81445) - Admin UI: Fix the primary color of the Fresh admin color scheme (WordPress/gutenberg#81618) - Inner Blocks: Fix bug that caused alignment controls to show in Image blocks within a Gallery (WordPress/gutenberg#81606) - Layout block supports: cast numeric grid attributes before use (WordPress/gutenberg#81560) - Make Back button grid column flexible. (WordPress/gutenberg#81701) - List View: Make focus on mount opt in (WordPress/gutenberg#81659) - Lazy Editor: Render the editor preferences modal (WordPress/gutenberg#81630) - Edit Site Init: Seed the editor preferences the editor expects (WordPress/gutenberg#81628) - Boot: Do not offer to edit a trashed entity (WordPress/gutenberg#81632) - Block API: Address review feedback on block keyboard shortcuts (WordPress/gutenberg#81621) - Editor: Simplify List View sidebar shortcut handling (WordPress/gutenberg#81693) - RichText: Use the current record when handling Enter (WordPress/gutenberg#81696) - Boot: Sync the editor's device preview with the URL (WordPress/gutenberg#81617) - Stop saving Table of Contents output (WordPress/gutenberg#80404) - Lazy Editor: Keep the theme's editor styles on the canvas (WordPress/gutenberg#81747) - List View: Fix flaky global shortcut test and re-enable it (WordPress/gutenberg#81690) - Boot: Preview the site where the canvas has nothing to open (WordPress/gutenberg#81749) - Docs: Require site editor features to land in the extensible site editor too (WordPress/gutenberg#81752) - Build Tools: Stop watcher process trees on shutdown (WordPress/gutenberg#81504) - Update Terrazzo packages to 2.5.0 (WordPress/gutenberg#81082) - Site Editor: Use inverted ThemeProvider seed for portaled UI (WordPress/gutenberg#81653) - Components: Migrate DropdownContentWrapper to SCSS module (WordPress/gutenberg#81522) - Playlist: Add aria-label to prevent placeholder as label (WordPress/gutenberg#81654) - UI: Collapse item-popup item sizing to default and small (WordPress/gutenberg#81354) - Add `__unstable_wp_sync_storage` filter for pluggable storage backends (WordPress/gutenberg#81697) - Bump github/codeql-action/upload-sarif (WordPress/gutenberg#81436) - Feat: support block spacing (WordPress/gutenberg#79689) - Enable axial gap for Group and restrict to flex and grid layouts. (WordPress/gutenberg#81476) - Packages: Split tsconfigs for utility and mid-size packages (WordPress/gutenberg#81514) - Media Editor Route: Make the route look like it's part of the media menu in the left-hand sidebar (WordPress/gutenberg#81565) - Global Styles: filter and indicate blocks that have custom styles (WordPress/gutenberg#81373) - Prevent white screen crash during undo operations when Media Modal is open (WordPress/gutenberg#79898) - Fix clipped focus outlines in the media editor Details sidebar (WordPress/gutenberg#81703) - Fix: URL: normalizePath drops the rest of the query after a second "?" (WordPress/gutenberg#81612) - Block Editor: Add translator context to pseudo-state labels (WordPress/gutenberg#81770) - Global styles: Register <label> as element (WordPress/gutenberg#81160) - Site editor: update template section description. (WordPress/gutenberg#81613) - Fix: Accordion: Anchored hash inside the accordion throws the malformed URL console error (WordPress/gutenberg#81780) - BoxControl: update the opposite side when ALT is held on the left or right input (WordPress/gutenberg#81530) - Tabs: Give tab IDs their own counter so numbering starts at 1 and never skips (WordPress/gutenberg#81781) - Modal: Stop Escape key propagation on dismiss (WordPress/gutenberg#81785) - RTC: Couple RTC and polling provider as an opt-in experiment (WordPress/gutenberg#80658) - ui/Card: Use the default neutral border (WordPress/gutenberg#81746) - Update playlist track placeholder to match aria label (WordPress/gutenberg#81762) - Notes: keep the note actions menu in view for long display names (WordPress/gutenberg#81414) - Fix DataViews list layout color token usage (WordPress/gutenberg#81074) - UI: Add Spinner component (WordPress/gutenberg#81358) - Fields: Export the package stylesheet (WordPress/gutenberg#81769) - Fix the failing e2e test (WordPress/gutenberg#81739) - RTC: Add fallback identities when user profiles are unavailable (WordPress/gutenberg#81408) - Align collaboration migration version markers with the 23.8.0 release (WordPress/gutenberg#81789) - Dashboard: add a Site Health detail page as the dashboard's second route (WordPress/gutenberg#81729) - Dashboard Widgets: resolve widget types without a metadata module (WordPress/gutenberg#81738) - Theme: Improve color ramp contrast safeguards (WordPress/gutenberg#81185) - More block: clarify description about excerpt vs full content (WordPress/gutenberg#80619) - Schemas: Document what the theme.json schema checks (WordPress/gutenberg#81773) - Components, DataViews, Editor, UI: Split tsconfigs into build and dev projects (WordPress/gutenberg#81515) - Command Palette: Allow commands to override the category icon (WordPress/gutenberg#81787) - Fix Broken Links in Package file (WordPress/gutenberg#81700) - Notes: Stop forcing capitalization of user names (WordPress/gutenberg#81788) - Media Editor Route: Add undo/redo and save/cancel actions to the header (WordPress/gutenberg#81563) - Fix: Post Editor: Canvas animates from the left when switching mobile/tablet preview to desktop (WordPress/gutenberg#81484) - Build Package: Use Core's boot module when a plugin has none (WordPress/gutenberg#81761) - Docs: Fix broken link to the Document-Isolation-Policy explainer. (WordPress/gutenberg#81790) - Tests: Make PHPUnit tests independent of test config flags and theme root (WordPress/gutenberg#79159) - Editor: Debounce term filtering and announce results once (WordPress/gutenberg#81422) - Packages: Split story package tsconfigs into build and dev projects (WordPress/gutenberg#81516) - Packages: Complete the tsconfig build and dev project split (WordPress/gutenberg#81517) - TypeScript: Require the typecheck run for type checking in CI (WordPress/gutenberg#81518) - Block Editor: Remove leftover files (WordPress/gutenberg#81793) - Rename the media editor toolbar button to 'Edit image' (WordPress/gutenberg#81705) - Playlist: Remove block toolbar sharing between parent and child blocks (WordPress/gutenberg#81432) - Components: Fix Storybook accessibility issues in stories (WordPress/gutenberg#81777) - Fields: migrate last remaining JS file to TS (WordPress/gutenberg#81808) - Menu: Add UI component (WordPress/gutenberg#79560) - Patterns explorer: Refactor the category sidebar to use Tabs (WordPress/gutenberg#81807) - add context to change "revisions code diff" (WordPress/gutenberg#81820) - Add command: View post (WordPress/gutenberg#66720) - Fix: Post Editor: 403 on /wp/v2/settings at boot for users without manage_options cap (WordPress/gutenberg#81813) - UI: Add initial agents guidance mapping to contributing guidelines (WordPress/gutenberg#81400) - UI: Mark Input-related components as recommended (WordPress/gutenberg#81658) - Post Template: Fix mover arrows and labels for blocks inside the grid view (WordPress/gutenberg#81120) - Docs: Fix broken link to the getEntityRecords selector reference. (WordPress/gutenberg#81791) - Quick Inserter: Standardize the design of the Browse all button (WordPress/gutenberg#81827) - UI: Add TextareaControl component (WordPress/gutenberg#81359) - Docs: Narrow the tsconfig split guidance to the standard layout (WordPress/gutenberg#81828) - Storybook: Fix production build warnings (WordPress/gutenberg#81758) - Components: migrate ResizableBox to SCSS module- WordPress/gutenberg#80720 (WordPress/gutenberg#81792) - Bump astral-sh/setup-uv from 9.0.0 to 10.0.0 in /.github/workflows (WordPress/gutenberg#81823) - Global Styles: Keep storing shadow presets as CSS variables when custom presets exist (WordPress/gutenberg#81346) - Docs: Fix broken skip ahead anchor on the custom block editor guide. (WordPress/gutenberg#81835) - Fix MediaPlaceholder drag eligibility (WordPress/gutenberg#81431) - Updated Aria Landmark Example URL (WordPress/gutenberg#81832) - TypeScript: Put route projects under the typecheck run (WordPress/gutenberg#81829) - Add missing dependency to media-editor route (WordPress/gutenberg#81845) - Add transform to Row for Columns block (WordPress/gutenberg#81802) - Editor: Remove FlexItem usage from NoteCard (WordPress/gutenberg#81851) - UI: Expose keyboard shortcut presentation utilities (WordPress/gutenberg#81826) - Theme: Add color warning diagnostics workbench (WordPress/gutenberg#81817) - Editor: Surface debugging details in the ErrorBoundary (WordPress/gutenberg#81642) - Update save & submit docs (WordPress/gutenberg#81077) - Boot: Migrate styles to CSS Modules (WordPress/gutenberg#81756) - Build: Emit TypeScript declarations with --noCheck (WordPress/gutenberg#81839) - Core Data: Validate the parsed-blocks cache against registered block types (WordPress/gutenberg#81809) - Dependencies: Dedupe, update adm-zip, nx (WordPress/gutenberg#81870) - Core Data: Allow keyless entities to be addressed without a record ID (WordPress/gutenberg#81857) - UI: Mark Autocomplete, Field, and Fieldset as recommended (WordPress/gutenberg#80636) - Editor: Announce publish date changes to screen readers (WordPress/gutenberg#81629) - Storybook: Fix default background color for Example Application theme story (WordPress/gutenberg#81765) - Fix/79641 rtc cursor hidden details block v2 (WordPress/gutenberg#81322) - UI: add ControlWithError component (WordPress/gutenberg#81574) - Global Styles: Group shadow editor rows as items (WordPress/gutenberg#81871) - Storybook: Handle production module load failures (WordPress/gutenberg#81867) - Pattern: Disable visibility support (WordPress/gutenberg#81866) - Design System: Add portable agent skills (WordPress/gutenberg#80597) - Global Styles: Allow editing duotone palettes (WordPress/gutenberg#81605) - Color Palette panel: Remove empty whitespace when there are no theme colors (WordPress/gutenberg#81894) - Try caching gutenberg_get_global_styles (WordPress/gutenberg#81889) - Refactor parameter type hints and clean comments (WordPress/gutenberg#81898) - Preserve layout and style attributes on Column transform (WordPress/gutenberg#81855) - Global Styles: Close the revisions screen on the first back click (WordPress/gutenberg#81897) - Editor: Set the width an entity opens at from the editor provider (WordPress/gutenberg#81750) - Pre-publish panel: Remove the headings that repeat the panel title (WordPress/gutenberg#81806) - Components: migrate ComboboxControl to SCSS module (WordPress/gutenberg#80471) - UI: Update Base UI to 1.7.0 (WordPress/gutenberg#81390) - Update Ariakit packages (0.4.35 => 0.4.37) (WordPress/gutenberg#81080) - chore: Update the combobox SCSS to have a breaking changes log (WordPress/gutenberg#81923) - Use `WCTextareaControl` alias for legacy TextareaControl imports (WordPress/gutenberg#81834) - Components: Improve text detection for button icon-with-text (WordPress/gutenberg#81521) - Font Library: Fix the preview weight for variable fonts (WordPress/gutenberg#81748) - Editor: Migrate hierarchical term selector to @wordpress/ui (WordPress/gutenberg#81848) - Validation: update dependency-audit to 0.4.6 and ignore dataviews ./wp bundle (WordPress/gutenberg#81928) - SearchableChipSelect: Add grouped items support (WordPress/gutenberg#80989) - Use `WCInputControl` alias for legacy InputControl imports (WordPress/gutenberg#81830) - Storybook: Upgrade to 10.5 (WordPress/gutenberg#80692) - Documentation: Update coding guidelines to recommend TypeScript (WordPress/gutenberg#81763) - Font library: Add skeleton loader for the font preview images (WordPress/gutenberg#81047) - Build Scripts: Force tsc --pretty so CI reports the project behind global diagnostics (WordPress/gutenberg#81937) - Update is-plain-object to 5.1.0 (WordPress/gutenberg#81926) - DataViews: Sync the displayed calendar month with external value changes (WordPress/gutenberg#81635) - DataForm: Make the panel layout edit button the real field trigger (WordPress/gutenberg#80689) - Dependency updates Aug 2026 (2) (WordPress/gutenberg#81906) - Playlist: Add bulk track metadata editing (WordPress/gutenberg#81441) - Automated Testing: Change Storybook default a11y test to error on failure (WordPress/gutenberg#81597) - Playlist Track: Improve track upload error flows (WordPress/gutenberg#81878) - Block Library: Fix failing test in playlist block (WordPress/gutenberg#81950) - Block editor: Move isElementVisible changelog entry to Unreleased (WordPress/gutenberg#81953: shail-mehta <shailu25@git.wordpress.org> Co-authored-by: Mamaduka <mamaduka@git.wordpress.org> - DataViews: Fix date and datetime controls selecting the adjacent day (WordPress/gutenberg#81498) - UI: Accept locale codes in Calendar components (WordPress/gutenberg#81814) - List: Add Align Support (WordPress/gutenberg#68002) - TypeScript: Bring the remaining route projects under the typecheck run (WordPress/gutenberg#81847) - Components: migrate GradientPicker, ColorPalette to SCSS module (WordPress/gutenberg#80473) - Docs: Align @PARAM tag columns in test/ docblocks (WordPress/gutenberg#81905) - Hide layout panel when no controls are available (WordPress/gutenberg#81968) - UI: Add ValidatedInputControl component (WordPress/gutenberg#81627) - Components: migrate StyledLabel to SCSS module (WordPress/gutenberg#80001) - fix: Button rtl loader issue (WordPress/gutenberg#81901) - Theme: Update Terrazzo packages to 2.7.1 (WordPress/gutenberg#81978) - CollapsibleCard: Support multiple header descriptions (WordPress/gutenberg#81227) - DataViews: use `Menu` from `@wordpress/ui` (WordPress/gutenberg#81783) - DataViews: Localize the date/datetime calendars from the site locale and direction (WordPress/gutenberg#81592) - Replace the Storybook test runner with the Vitest integration (WordPress/gutenberg#81918) - Block Editor: Don't close inserter panel when inline quick inserter opens (WordPress/gutenberg#76241) - Updated broken links in document files (WordPress/gutenberg#81961) - Boot: Mount the registered plugins (WordPress/gutenberg#81754) - Extensible Site Editor: Add a theme preview page with global styles editing (WordPress/gutenberg#81954) - Block Styles: Refactor the variation UI to use ui/Button (WordPress/gutenberg#81833) - Styles Route: Reference the api-fetch and html-entities projects (WordPress/gutenberg#81989) - Fix: Line Break Tags Added to Scripts and Styles (WordPress/gutenberg#77542) - Fix: skip empty block markup in navigation to prevent split UL elements (WordPress/gutenberg#78793) - Pattern List: Import a pattern from JSON (WordPress/gutenberg#81919) - UI: Add tooltips to Calendar and RangeCalendar navigation buttons (WordPress/gutenberg#81983) - UI: Add `ValidatedTextArea` control (WordPress/gutenberg#81984) - Fix: Responsive styles: When enabled and a font-size is setting, the corresponding CSS variable remains undefined (WordPress/gutenberg#81854) - Components: Migrate `TextareaControl` to SCSS module (WordPress/gutenberg#81353) - UI: Set Calendar text direction automatically (WordPress/gutenberg#81982) - Theme: Rename ThemeProvider wrapper CSS class from root to wrapper (WordPress/gutenberg#81996) - Editor: Offer the theme export from both site editors (WordPress/gutenberg#81992) - Fix: Stop stripping spaces inside inline HTML elements on paste (WordPress/gutenberg#76696) - DataViews: Add a lint rule preventing private API imports (WordPress/gutenberg#81478) - Components: Migrate ProgressBar styles from Emotion to SCSS module (WordPress/gutenberg#80512) - RTC: Disable syncing for unpersistable post types (WordPress/gutenberg#81946) - Boot: Restore centered snackbar notices (WordPress/gutenberg#81995) - BorderControl, BorderBoxControl: Migrate styles to CSS Modules (WordPress/gutenberg#80437) - Duotone Picker: Stop the duotone bar offering to move its control points (WordPress/gutenberg#81850) - DataViews: Add an aspect ratio toggle for grid layouts (WordPress/gutenberg#81604) - Remove `fixable` on `i18n-no-flanking-whitespace` (WordPress/gutenberg#70279) - Dynamic Gallery block: Skip transforms that expect inner blocks, e.g. Image and Grid transforms (WordPress/gutenberg#82009) - Accordion Heading: Route theme.json spacing to the toggle button (WordPress/gutenberg#81976) - Element: Serialize memo-wrapped components instead of an empty string (WordPress/gutenberg#81986) - Style: Update color to use CSS variable in global-styles-ui (WordPress/gutenberg#79053) - Dashboard Widgets: let the host decide which component renders an action link (WordPress/gutenberg#81740) - Tabs: make inactive panel content findable in page (WordPress/gutenberg#81743) - Border Panel: Fix incorrect panel label (WordPress/gutenberg#78830) - Components: Migrate ZStack styles from Emotion to SCSS module (WordPress/gutenberg#80514) - Storybook: Add missing @types/jest devDependency (WordPress/gutenberg#82017) - TypeScript: Drop redundant undefined casts for keyless entity record IDs (WordPress/gutenberg#82018) - Editor: Fix start page/template modal footer overflow (WordPress/gutenberg#82021) - Storybook: Keep Vitest story scanning independent of the Vite root (WordPress/gutenberg#82020) - Test: Port shared Vitest test environment (WordPress/gutenberg#81038) - Query No Results: Add Border & Spacing Support (WordPress/gutenberg#64601) - RadioControl: allow individual options to be disabled (WordPress/gutenberg#82026) - Components: Migrate `BoxControl` to SCSS module (WordPress/gutenberg#80715) - SearchableChipSelectControl: Add form control to @wordpress/ui (WordPress/gutenberg#80980) - UI: Move controlled prop guidance to contributing docs (WordPress/gutenberg#82044) - Components: Migrate Scrollable to SCSS module (WordPress/gutenberg#80694) - UI: Fix accessibility issues in form primitives and their stories (WordPress/gutenberg#81853) - UI: Align Calendar styling with WPDS tokens (WordPress/gutenberg#81438) - Calendar: Support custom root roles (WordPress/gutenberg#81443) - E2E Tests: Use str_starts_with()/str_contains() in hide-user-rest-routes plugin (WordPress/gutenberg#82030) - Site editor v2: Fix block error with navigation-edit route (WordPress/gutenberg#82051) - ActionItem: Move the more menu deduplication out of the Slot (WordPress/gutenberg#81507) - DataViews: Fix invisible sticky Actions column divider (WordPress/gutenberg#82055) - Quick draft: replace Button+Link with LinkButton (WordPress/gutenberg#82031) - Lint: Prevent private API imports in all bundled packages (WordPress/gutenberg#82015) - PaletteEdit: Expose palette swatches as command buttons (WordPress/gutenberg#82023) - Test: Add Vitest React, Emotion compilation, console, and snapshot parity (WordPress/gutenberg#81039) - remove dead class reference in quick-draft (WordPress/gutenberg#82064) - `InputControl`: Hide the value-like placeholder Safari renders in empty date and time inputs in `ui` and `components` packages (WordPress/gutenberg#81991) - Site editor v2: Fix template part list pagination and sorting (WordPress/gutenberg#82054) - Build: Fix ESM declaration resolution (WordPress/gutenberg#82022) - Core Data: Stop storing NaN pagination totals for unpaginated endpoints (WordPress/gutenberg#82059) - Dashboard widgets & Grid: use kebab-case for CSS selectors (WordPress/gutenberg#82053) - CI: Skip the package CHANGELOG check when only the CHANGELOG changed (WordPress/gutenberg#82069) - Menu: Close non-modal menus on iframe interaction (WordPress/gutenberg#81952) - Packages: Recover August 26 npm release metadata (WordPress/gutenberg#82086) - Private APIs: Add back '@wordpress/dataviews' to the allowed core modules (WordPress/gutenberg#82221) Fixes #66067. Built from https://develop.svn.wordpress.org/trunk@63535 git-svn-id: http://core.svn.wordpress.org/trunk@62711 1a063a9b-81f0-0310-95a4-ce76da25c4cd

fix: improve block merging behavior for empty blocks

03329e5

github-actions Bot added the [Package] Block editor /packages/block-editor label May 28, 2026

coderGtm and others added 2 commits May 28, 2026 19:20

test: add tests for empty block removal merge behavior

6209531

Merge branch 'trunk' into fix/heading-block-delete-flow

61fb091

coderGtm marked this pull request as ready for review May 28, 2026 14:11

coderGtm requested a review from ellatrix as a code owner May 28, 2026 14:11

Merge branch 'trunk' into fix/heading-block-delete-flow

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jasmussen requested review from a team and aaronrobertshaw and removed request for a team June 9, 2026 11:12

Merge branch 'trunk' into fix/heading-block-delete-flow

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ntsekouras reviewed Jun 9, 2026

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fix: refine block merging logic for empty blocks

44531a2

t-hamano added [Type] Enhancement A suggestion for improvement. [Feature] Writing Flow Block selection, navigation, splitting, merging, deletion... labels Jun 10, 2026

fix: enhance merging behavior for nested list items during deletion

34d9b45

coderGtm requested review from ajitbohra and fabiankaegy as code owners June 10, 2026 12:15

github-actions Bot added the [Package] Block library /packages/block-library label Jun 10, 2026

coderGtm and others added 2 commits June 10, 2026 17:46

Merge branch 'trunk' into fix/heading-block-delete-flow

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fix: update tests for refined logic

d132e07

ellatrix mentioned this pull request Aug 11, 2026

Block Editor Paper Cuts 📄🩸 #81453

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ellatrix and others added 4 commits August 12, 2026 14:36

Restore the nested list item merge behaviour

08d1191

Backspace outdenting nested items is deliberate; changing it to merge with the previous sibling belongs in its own pull request with its own tests. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Cover forward deleting an empty heading end to end

bef8476

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Merge remote-tracking branch 'origin/trunk' into pr-78779

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github-actions Bot removed the [Package] Block library /packages/block-library label Aug 12, 2026

ellatrix approved these changes Aug 12, 2026

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ellatrix enabled auto-merge (squash) August 12, 2026 22:00

ellatrix disabled auto-merge August 12, 2026 23:46

ellatrix enabled auto-merge (squash) August 12, 2026 23:46

ellatrix merged commit 07d89d5 into WordPress:trunk Aug 13, 2026
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github-actions Bot added this to the Gutenberg 23.9 milestone Aug 13, 2026

coderGtm deleted the fix/heading-block-delete-flow branch August 13, 2026 08:17

MaggieCabrera added [Type] Bug An existing feature does not function as intended and removed [Type] Enhancement A suggestion for improvement. labels Aug 26, 2026

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Fix: Delete key on empty heading transforms following paragraph into heading - #78779

Fix: Delete key on empty heading transforms following paragraph into heading#78779
ellatrix merged 15 commits into
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