What’s new in Gutenberg 10.8? (9 June)

Two weeks have passed since the last GutenbergGutenberg The 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/ release, which means the time has come for a new version! Gutenberg 10.8 focuses on stability and performance, while also introducing enhancements to the Template Editor and enables more design tools for blocks, among many other things!

Performance Improvements

This release puts a focus on performance by providing iterative improvements. For instance, Gutenberg now allows passing of __experimentalLayout to a memo’d object so re-renders are not triggered when layout data doesn’t change. Thanks to this, blocks like BlockList don’t need to re-render so often, optimizing the editor performance.

More BlockBlock Block 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. Design Tools

To extend the design capabilities of blocks, more design tools have been enabled in this release, including support for font-weight for the heading block and support for custom fonts for the List block. As with other design tools, you can easily configure them in your theme.json file. 

Furthermore, it is now possible to add custom margin and padding to the Navigation link block.

Template Editor Enhancements

Gutenberg 10.8 also introduces a couple of enhancements for the Template Editor for a better user experience. Now, the title area in the Template Editor corresponds to the current post title. Also, the appearance of the template details popover has been enhanced with more detailed information and an improved layout. 

These improvements help users understand what post and template are being edited with a more clear and descriptive interface.



  • Block Editor:
    • Update Modal styling. (31639)
  • Block Library:
    • Archives Block: Show the label for archives block dropdown. (30527)
    • Audio Block: Add an example preview. (32333)
    • File Block: Add an example preview. (32350)
    • Heading Block: Add support for font-weight. (27639)
    • List Block: Add font family to the list block. (27510)
    • Page list block: Add active page classes. (32134)
    • Site Logo: Use option instead of theme-mod. (32229)
  • Components:
    • BoxControl: Add allowReset option. (32345)
      General Interface:
    • Remove opacity animation on canvas. (32266)
  • Design tools:
    • Add Letter-spacing and enable this for site title and site tagline. (31118)
    • Block Supports: Allow skipping spacing support serialization. (31973)
  • Reusable Block:
    • Add Convert to Regular Blocks button to ellipsis Dropdown. (32310)
  • REST APIREST API The 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/.:
    • Improve parsing and retrieve additional data in REST url-details endpoint. (31763)
  • Template Editing Mode:
    • Don’t display snackbar with the Welcome Guide. (32076)
    • Update the appearance of the template details popover. (32042)
    • Update the title area in the template editor. (32037)
  • Block-based Widgets:
    • CustomizerCustomizer Tool built into WordPress core that hooks into most modern themes. You can use it to preview and modify many of your site’s appearance settings.:
      • Add preferences menu group label to widgets and customize widgetWidget A 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. editor. (32259)
      • Display wide widgets as popovers in Customizer. (31736)
    • Editor:
      • Link to widgets.php instead of themes.php?page=gutenberg-widgets. (32299)

Bug Fixes

  • Block Library:
    • Image Block: Fix image border radius. (32393)
    • List Block: Fix theme.json styles for the core/list block. (32343)
    • Latest Posts: Limit latest posts featured imageFeatured image A featured image is the main image used on your blog archive page and is pulled when the post or page is shared on social media. The image can be used to display in widget areas on your site or in a summary list of posts. width to 100%. (32245)
    • Legacy Widget Block:
      • Fix legacy widget block preview iframeiframe iFrame is an acronym for an inline frame. An iFrame is used inside a webpage to load another HTML document and render it. This HTML document may also contain JavaScript and/or CSS which is loaded at the time when iframe tag is parsed by the user’s browser.. (32300)
      • Fix legacy widget previews. (32260)
    • Search block: Fix vertical alignment of the search button text. (32340)
  • Block Editor:
    • Block Variation Transforms: Make focus style valid CSSCSS Cascading Style Sheets.. (32305)
    • Fixed Random Collapse of Colors Setting Section. (32388)
    • Block Toolbar:
      • Always close the options menu after toggling the sidebarSidebar A 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.. (31921)
      • Fix toolbar alignment in widget block editor. (31991)
    • Iframe: Fix embed dimensions with missing wp-embed-responsive class. (32057)
    • Patterns: Fix allowed patterns check. (32376)
  • Block-Based Widgets:
    • Editor:
      • Fix error when saving empty Legacy Widget block. (32359)
      • Assume light theme when editor canvas background color isn’t set. (32477)
    • Customizer:
      • Center the welcome image in the narrow viewport of widgets customizer. (32264)
      • Fix aspect ratio of welcome image. (32302)
      • Fix deselecting block when inspector is opened. (32361)
      • Fix escape key events in customizer closing the editor. (32175)
      • Fix some smaller styling issues and bugs in Widgets Customizer. (32072)
      • Fix creating and replacing legacy widgets in customizer. (32005)
  • Components:
    • SuggestionsList: Try to use a unique “key”. (32344)
    • Update Dropdown’s close-on-blur logic to work inside dialogs. (32133)
  • Editor:
    • Allow non-latin characters in slugs. (32232)
    • Post Preview Button: Prevent saving the post before previewing in locked/read-only mode. (32341)
  • General Interface: Fix overlap of Notices and block toolbar. (32238)
  • Template Editing Mode: Remove metaboxes from template mode. (32315)
  • Fix the layout definition in the template mode. (32425)


  • Buttons: Move options to constants to avoid unneeded renders. (32356)
  • Experimental Layout: Pass the same object when no data changes. (32380)
  • Navigation: Avoid rerendering when the placeholder does not change. (32357)
  • Update Welcome Guides to use external image URLs. (32026)


  • Block Editor:
    • Block Navigation: Try using CSS for indentation with known max indent instead of spacer divs. (32063)
  • Component System:
    • Add missing Divider, Heading type reference in tsconfig. (32104)
    • Adds a new ZStack component. (31613)
    • Adds new ItemGroup and Item components. (30097)
    • Add new BaseField Component. (32250)
    • Fix Shortcut polymorphism. (31555)
    • Promotes the Elevation component to a full export. (31614)
  • Global Styles:
    • Bugfix: Generate classes from preset slugs in the same way (server & client). (32352)
    • Fix Logic to enable custom colors, gradients, and font sizes. (32200)
    • Fix incorrect useCustomUnits import. (32248)
    • Group typographic block supports under a typography key. (32252)
    • Letter spacing should also respect skip serialization flag. (32459)
    • Skip typography serialization. (32444)
  • Full Site Editing:
    • Align block hover and select styles across list view, site editor, select mode. (31277)
    • Alignment styles: Centre blocks using grid not margins. (32231)
    • Avoid duplicate skip-links in WP 5.8+. (32346)
    • Remove now-obsolete get_template_hierarchy(). (32116)
    • Templates: Remove now-obsolete gutenberg_get_template_paths(). (32066)
  • Navigation:
    • Block:
      • Fix css bleed from navigation. (32384)
      • Fix collapsing regressionregression A software bug that breaks or degrades something that previously worked. Regressions are often treated as critical bugs or blockers. Recent regressions may be given higher priorities. A "3.6 regression" would be a bug in 3.6 that worked as intended in 3.5. of Navigation MenuNavigation Menu A theme feature introduced with Version 3.0. WordPress includes an easy to use mechanism for giving various control options to get users to click from one place to another on a site.. (32081)
      • Lock the document from scrolling when the modal is open. (32269)
      • Refactor Navigation block paddings/margins to inherit global styles. (31878)
    • Editor:
      • Allow block attributes passed to block renderer by way of wp_nav_menu. (31911)
      • Hide sidebar when a menu isn’t selected. (32090)
      • Fix the visible widget area toolbar. (32262)
      • Fix block toolbar position after scroll. (32212)
      • Move modal state to ManageLocations component. (32078)
  • Site Editor:
    • Fix broken template part converter modal styles. (32097)
    • Remove title attribute from NavigationItem inside the site-editor. (30744)


  • Handbook:
    • Fix broken contributors readme files. (32272)
    • Fix misspelling in the Widgets Block Editor section. (32242)
    • Mark all experimental components in the handbook. (32147)
    • Update the create a block theme tutorial. (31269)
    • Update iOSiOS The operating system used on iPhones and iPads. Simulator device command in ReactReact React is a JavaScript library that makes it easy to reason about, construct, and maintain stateless and stateful user interfaces. https://reactjs.org/. Native documentation. (32383)
  • Packages:
    • Navigation Editor: Augment and improve Nav Editor (and block) documentation. (31891)
    • Components: Fixed documentation for units attribute in Unit Control. (31901)

Code Quality

  • Block Editor:
    • Rich text:
      • Contextual default shortcut removal. (32327)
      • Remove inline display warning. (32013)
    • Colors: Remove __experimentalUseColors hook. (31438)
    • Remove usages of withState from edit-post and editor. (32349)
  • Block Library:
    • List View: Simplify the BlockNavigation component. (31290)
    • Navigation: Simplify htmlHTML HyperText Markup Language. The semantic scripting language primarily used for outputting content in web browsers. selector in nav burger menu. (32303)
    • Remove “class=” wrapper to already wrapped attributes. (29214)
    • Query Block: Remove query context leftovers. (32093)
  • Blocks Package: Make getBlockSupport support any lodash path.. (32322)
  • Block Supports: Avoid a PHPPHP The web scripting language in which WordPress is primarily architected. WordPress requires PHP 5.6.20 or higher Notice when render_block() is called without attributes. (32135)
  • Components:
    • Button: Deprecate isPrimaryisSecondaryisTertiary and isLink props in favour of variant prop. (31713)
    • Combobox: Remove duplicated ComboboxControl component. (32397)
    • Dashicons: Add types to Icon . (32219)
    • Disabled: Add types to Disabled components. (32105)
    • Remove all withNext wrappers. (32205)
    • Rename ViewOwnProps to PolymorphicComponentProps. (32053)
    • Require explicit children prop for all components. (31817)
    • UIUI User interface Context: Delete unused types from context. (32254)
    • UI Popover: Remove unused content property from types definitions. (32049)
  • Compose:
    • Add types to useRefEffect and clipboard hooksHooks In 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.. (31603)
    • Add Types to withGlobalEvents as any. (32290)
    • Add types to useWarnOnChange. (32288)
    • Add types to useViewportMatch. (32287)
    • Add types to useDropZone. (32286)
    • Add types to useDragging. (32285)
    • Add types to useThrottle and typecheck useFocusOutside. (32170)
    • Add types to useKeyboardShortcut. (32168)
    • Add types to useResizeObserver and type checking to useIsomorphicLayoutEffect. (32111)
    • Add types to useFocusReturn. (31949)
    • Add types to usePrevious. (31944)
    • Add types to useReducedMotion and useMediaQuery. (31941)
    • Add types to useMergeRefs. (31939)
    • Add test to useMergeRefs for disabling refs + better documentation. (32044)
    • Add types to useDebounce. (32015)
    • Deprecate withState in favor of useState. (32368)
    • Simplify compose function documentation and point to lodash documentation for it. (32324)
  • Global Styles:
    • Avoid enqueuing global styles twice when running on WordPress 5.8. (32372)
  • Keyboard Shortcuts:
    • Multi select: select all: Restore ref callback. (32318)
  • Linting:
    • Fix eslint warnings in the coreCore Core is the set of software required to run WordPress. The Core Development Team builds WordPress.-data package. (32198)
    • Fix eslint warnings in the edit-navigation package. (32196)
    • Fix eslint warnings in the edit-post package. (32195)
    • Fix eslint warnings in the edit-site package. (32156)
    • Fix eslint warnings in the edit-widgets package. (32155)
    • Fix eslint warnings in the editor package. (32153)
    • Fix eslint warnings in the nux package. (32145)
    • Fix eslint warnings in the rich-text package. (32142)
    • Fix eslint warnings in the reusable-blocks package. (32141)
  • Navigation Editor:
    • Fix React warning. (32165)


  • Babel presets: Prefix build with node command for Windows environments. (#32258). (32329)
  • Workflow:
    • Limit when workflows run on forks. (32114)
    • Only calculate the compressed size on pull requests when necessary. (32161)
    • Performance Tests Workflow:
      • Polish Bash script. (32284)
      • Run suite atop latest stable major WordPress version. (32244)
      • Use latest WP branchbranch A directory in Subversion. WordPress uses branches to store the latest development code for each major release (3.9, 4.0, etc.). Branches are then updated with code for any minor releases of that branch. Sometimes, a major version of WordPress and its minor versions are collectively referred to as a "branch", such as "the 4.0 branch". for release tests. (32277)
  • End to End Tests:
    • Fix inserting cover block intermittent failure. (32014)
    • Navigation Editor:
      • Fix failing end-to-end tests. (32043)
      • Skip “Change detection” tests. (32151)
    • Move the Query and PostTitle end-to-end tests out of the experimental directory. (31691)
    • Multi select: Add end-to-end test for gruadual select all. (32304)
    • Remove redundant widget APIAPI An 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. endpoint tests. (32298)
    • Skip tests that are failing with the latest WordPress core. (32228)
  • Eslint: Ignore some eslint rules in react-native folders. (32143)

Performance Benchmark

The following benchmark compares performance for a particularly sizeable post (~36,000 words, ~1,000 blocks) over the last releases. Such a large post isn’t representative of the average editing experience but is adequate for spotting variations in performance.

VersionLoading TimeKeyPress Event (typing)
Gutenberg 10.85.78s42.03ms
Gutenberg 10.76.75s41.96ms
WordPress 5.76.95s42.81ms

Kudos to all the contributors that helped with the release! 👏

Thanks, @ntsekouras for managing the release and @priethor for helping and guiding me with the release post.

#core-editor, #editor, #gutenberg, #gutenberg-new