Gate client-side media processing as plugin-only by adamsilverstein · Pull Request #76700 · WordPress/gutenberg

adamsilverstein · 2026-03-19T19:58:10Z

Summary

Gates the client-side media processing (wasm-vips) feature behind IS_GUTENBERG_PLUGIN so it only loads when running as the Gutenberg plugin
The vips WASM worker adds ~16MB to the build output, which is too much overhead for WordPress core at this stage
The feature continues to work fully in the Gutenberg plugin but will be excluded when syncing to core
Companion core PR: Remove client-side media processing feature wordpress-develop#11309

Changes

lib/media/load.php: Early return when IS_GUTENBERG_PLUGIN is not defined, preventing all client-side media processing infrastructure (cross-origin isolation, JS flags, REST API modifications) from loading outside the plugin
lib/client-assets.php: Gate the gutenberg_enqueue_vips_loader action hook behind IS_GUTENBERG_PLUGIN, preventing the vips script module from being enqueued outside the plugin

Test plan

Activate Gutenberg plugin on a local site with HTTPS, upload an image in the block editor — client-side media processing should still work
Deactivate Gutenberg plugin, upload an image — standard server-side processing works normally
Verify gutenberg_is_client_side_media_processing_enabled() still returns true in plugin context on secure origins

github-actions · 2026-03-19T19:58:21Z

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Co-authored-by: adamsilverstein <adamsilverstein@git.wordpress.org>
Co-authored-by: ramonjd <ramonopoly@git.wordpress.org>
Co-authored-by: ellatrix <ellatrix@git.wordpress.org>

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ramonjd · 2026-03-20T06:17:36Z

lib/media/load.php


+// Client-side media processing is currently plugin-only while the feature matures.
+if ( ! defined( 'IS_GUTENBERG_PLUGIN' ) || ! IS_GUTENBERG_PLUGIN ) {
+	return;


Thanks for prepping this PR!

Just checking, I set define( 'IS_GUTENBERG_PLUGIN', false ); and it does stop here. 👍🏻

But I noticed that window.__clientSideMediaProcessing is still true and worker.js loads when I upload an image. Is that expected?

How did you test this? Is that because the core patch hasn't landed yet?

Client-side media processing (wasm-vips) adds ~16MB of WASM to the build. Gate the feature behind IS_GUTENBERG_PLUGIN so it remains active in the plugin but is excluded when syncing to WordPress core, reducing core bundle size.

ellatrix · 2026-03-20T13:33:03Z

I rebased to restart the tests. The 26 failures were the same as the ones earlier in trunk. I'm going to force a merge since there is time pressure for Beta 6. We can double check the tests during the code freeze.

Client-side media processing (wasm-vips) adds ~16MB of WASM to the build. Gate the feature behind IS_GUTENBERG_PLUGIN so it remains active in the plugin but is excluded when syncing to WordPress core, reducing core bundle size. Co-authored-by: adamsilverstein <adamsilverstein@git.wordpress.org> Co-authored-by: ramonjd <ramonopoly@git.wordpress.org> Co-authored-by: ellatrix <ellatrix@git.wordpress.org>

github-actions · 2026-03-20T13:35:07Z

I just cherry-picked this PR to the wp/7.0 branch to get it included in the next release: 2ee7ede

github-actions · 2026-03-20T13:56:01Z

Flaky tests detected in 675f005.
Some tests passed with failed attempts. The failures may not be related to this commit but are still reported for visibility. See the documentation for more information.

🔍 Workflow run URL: https://github.com/WordPress/gutenberg/actions/runs/23344982432
📝 Reported issues:

[Flaky Test] post title and content are editable and blocks can be inserted #76524 in /test/e2e/specs/editor/various/post-content-focus-mode.spec.js

This updates the pinned hash from the `gutenberg` from `487a096a9782ba6110a7686d7b4b2d0c55ed1b06` to `2ee7ede6be6d4e55d5c7047394c5c4e0ea8d521d`. The following changes are included: - RTC: Backport race condition fix (WordPress/gutenberg#76649) - Fix navigation block rendering unit test (WordPress/gutenberg#76685) - Hide Additional CSS controls when block is inside contentOnly editing mode (WordPress/gutenberg#76512) - RTC: Increase polling intervals, increase polling on primary room only (WordPress/gutenberg#76704) - Navigation: Avoid List View changing position when navigation block saves (WordPress/gutenberg#76659) - Fix navigation block unit test and e2e test (WordPress/gutenberg#76692) - Fix locked content when switching to a different template without exiting 'Edit pattern' (WordPress/gutenberg#76710) - Metabox: Fix checkbox style in sidebar (WordPress/gutenberg#76718) - Stop keeping stale controlled blocks after reset (WordPress/gutenberg#76591) - Gate client-side media processing as plugin-only (WordPress/gutenberg#76700) A full list of changes can be found on GitHub: https://github.com/WordPress/gutenberg/compare/487a096a9782ba6110a7686d7b4b2d0c55ed1b06…2ee7ede6be6d4e55d5c7047394c5c4e0ea8d521d. Log created with: git log --reverse --format="- %s" 487a096a9782ba6110a7686d7b4b2d0c55ed1b06..2ee7ede6be6d4e55d5c7047394c5c4e0ea8d521d | sed 's|#\([0-9][0-9]*\)|https://github.com/WordPress/gutenberg/pull/\1|g; /github\.com\/WordPress\/gutenberg\/pull/!d' | pbcopy See #64595. git-svn-id: https://develop.svn.wordpress.org/trunk@62076 602fd350-edb4-49c9-b593-d223f7449a82

This updates the pinned hash from the `gutenberg` from `487a096a9782ba6110a7686d7b4b2d0c55ed1b06` to `2ee7ede6be6d4e55d5c7047394c5c4e0ea8d521d`. The following changes are included: - RTC: Backport race condition fix (WordPress/gutenberg#76649) - Fix navigation block rendering unit test (WordPress/gutenberg#76685) - Hide Additional CSS controls when block is inside contentOnly editing mode (WordPress/gutenberg#76512) - RTC: Increase polling intervals, increase polling on primary room only (WordPress/gutenberg#76704) - Navigation: Avoid List View changing position when navigation block saves (WordPress/gutenberg#76659) - Fix navigation block unit test and e2e test (WordPress/gutenberg#76692) - Fix locked content when switching to a different template without exiting 'Edit pattern' (WordPress/gutenberg#76710) - Metabox: Fix checkbox style in sidebar (WordPress/gutenberg#76718) - Stop keeping stale controlled blocks after reset (WordPress/gutenberg#76591) - Gate client-side media processing as plugin-only (WordPress/gutenberg#76700) A full list of changes can be found on GitHub: https://github.com/WordPress/gutenberg/compare/487a096a9782ba6110a7686d7b4b2d0c55ed1b06…2ee7ede6be6d4e55d5c7047394c5c4e0ea8d521d. Log created with: git log --reverse --format="- %s" 487a096a9782ba6110a7686d7b4b2d0c55ed1b06..2ee7ede6be6d4e55d5c7047394c5c4e0ea8d521d | sed 's|#\([0-9][0-9]*\)|https://github.com/WordPress/gutenberg/pull/\1|g; /github\.com\/WordPress\/gutenberg\/pull/!d' | pbcopy See #64595. Built from https://develop.svn.wordpress.org/trunk@62076 git-svn-id: http://core.svn.wordpress.org/trunk@61358 1a063a9b-81f0-0310-95a4-ce76da25c4cd

This reverts commit d259aab.

adamsilverstein requested a review from spacedmonkey as a code owner March 19, 2026 19:58

adamsilverstein self-assigned this Mar 19, 2026

ramonjd reviewed Mar 20, 2026

View reviewed changes

Gate client-side media processing as plugin-only

675f005

Client-side media processing (wasm-vips) adds ~16MB of WASM to the build. Gate the feature behind IS_GUTENBERG_PLUGIN so it remains active in the plugin but is excluded when syncing to WordPress core, reducing core bundle size.

ellatrix force-pushed the csm-plugin-only branch from ba77c55 to 675f005 Compare March 20, 2026 13:28

ellatrix added the Backport to WP 7.0 Beta/RC Pull request that needs to be backported to the WordPress major release that's currently in beta label Mar 20, 2026

ellatrix approved these changes Mar 20, 2026

View reviewed changes

ellatrix merged commit d259aab into trunk Mar 20, 2026
44 checks passed

ellatrix deleted the csm-plugin-only branch March 20, 2026 13:33

github-actions bot added this to the Gutenberg 22.9 milestone Mar 20, 2026

github-actions bot removed the Backport to WP 7.0 Beta/RC Pull request that needs to be backported to the WordPress major release that's currently in beta label Mar 20, 2026

github-actions bot added the Backported to WP Core Pull request that has been successfully merged into WP Core label Mar 20, 2026

adamsilverstein added a commit that referenced this pull request Mar 21, 2026

Revert "Gate client-side media processing as plugin-only (#76700)"

12a4535

This reverts commit d259aab.

adamsilverstein mentioned this pull request Mar 21, 2026

Revert client-side media processing plugin-only gate #76751

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Gate client-side media processing as plugin-only#76700

Gate client-side media processing as plugin-only#76700
ellatrix merged 1 commit intotrunkfrom
csm-plugin-only

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adamsilverstein commented Mar 19, 2026 •

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