Block Visibility: Add `fetchpriority=auto` to `IMG` tags in blocks with conditional viewport visibility to prevent potential erroneous high loading priority by westonruter · Pull Request #76302 · WordPress/gutenberg

westonruter · 2026-03-09T02:04:48Z

What?

This adds fetchpriority=auto to IMG tags which appear in viewport-conditional blocks.

See companion ticket Core-64823 and PR for WordPress core: WordPress/wordpress-develop#11196

Why?

A hidden image with fetchpriority=high negatively impacts the LCP metric since it gets prioritized over images which are actually in the critical rendering path.

How?

Before ❌

<div
  class="entry-content alignfull wp-block-post-content has-global-padding is-layout-constrained wp-block-post-content-is-layout-constrained"
>
  <figure
    class="wp-block-image size-large wp-block-hidden-desktop wp-block-hidden-tablet"
  >
    <img
      fetchpriority="high"
      decoding="async"
      width="1024"
      height="741"
      src="http://localhost:8000/wp-content/uploads/2025/11/Bison_bison_Wichita_Mountain_Oklahoma-1024x741.jpg"
      alt="Mobile"
      class="wp-image-38"
      srcset="
        http://localhost:8000/wp-content/uploads/2025/11/Bison_bison_Wichita_Mountain_Oklahoma-1024x741.jpg  1024w,
        http://localhost:8000/wp-content/uploads/2025/11/Bison_bison_Wichita_Mountain_Oklahoma-300x217.jpg    300w,
        http://localhost:8000/wp-content/uploads/2025/11/Bison_bison_Wichita_Mountain_Oklahoma-768x556.jpg    768w,
        http://localhost:8000/wp-content/uploads/2025/11/Bison_bison_Wichita_Mountain_Oklahoma-1536x1112.jpg 1536w,
        http://localhost:8000/wp-content/uploads/2025/11/Bison_bison_Wichita_Mountain_Oklahoma-2048x1483.jpg 2048w
      "
      sizes="(max-width: 1024px) 100vw, 1024px"
    />
  </figure>

  <figure
    class="wp-block-image size-large wp-block-hidden-desktop wp-block-hidden-mobile"
  >
    <img
      decoding="async"
      width="1024"
      height="683"
      src="http://localhost:8000/wp-content/uploads/2025/11/Bison_with_its_young-2560w-1024x683.jpg"
      alt="Tablet"
      class="wp-image-37"
      srcset="
        http://localhost:8000/wp-content/uploads/2025/11/Bison_with_its_young-2560w-1024x683.jpg  1024w,
        http://localhost:8000/wp-content/uploads/2025/11/Bison_with_its_young-2560w-300x200.jpg    300w,
        http://localhost:8000/wp-content/uploads/2025/11/Bison_with_its_young-2560w-768x512.jpg    768w,
        http://localhost:8000/wp-content/uploads/2025/11/Bison_with_its_young-2560w-1536x1025.jpg 1536w,
        http://localhost:8000/wp-content/uploads/2025/11/Bison_with_its_young-2560w-2048x1366.jpg 2048w
      "
      sizes="(max-width: 1024px) 100vw, 1024px"
    />
  </figure>

  <figure
    class="wp-block-image size-large wp-block-hidden-mobile wp-block-hidden-tablet"
  >
    <img
      decoding="async"
      width="1024"
      height="668"
      src="http://localhost:8000/wp-content/uploads/2025/11/American_bison_k5680-1-1024x668.jpg"
      alt="Desktop"
      class="wp-image-36"
      srcset="
        http://localhost:8000/wp-content/uploads/2025/11/American_bison_k5680-1-1024x668.jpg  1024w,
        http://localhost:8000/wp-content/uploads/2025/11/American_bison_k5680-1-300x196.jpg    300w,
        http://localhost:8000/wp-content/uploads/2025/11/American_bison_k5680-1-768x501.jpg    768w,
        http://localhost:8000/wp-content/uploads/2025/11/American_bison_k5680-1-1536x1002.jpg 1536w,
        http://localhost:8000/wp-content/uploads/2025/11/American_bison_k5680-1-2048x1336.jpg 2048w
      "
      sizes="(max-width: 1024px) 100vw, 1024px"
    />
  </figure>
</div>

After ✅

<div
  class="entry-content alignfull wp-block-post-content has-global-padding is-layout-constrained wp-block-post-content-is-layout-constrained"
>
  <figure
    class="wp-block-image size-large wp-block-hidden-desktop wp-block-hidden-tablet"
  >
    <img
      decoding="async"
      width="1024"
      height="741"
      fetchpriority="auto"
      src="http://localhost:8000/wp-content/uploads/2025/11/Bison_bison_Wichita_Mountain_Oklahoma-1024x741.jpg"
      alt="Mobile"
      class="wp-image-38"
      srcset="
        http://localhost:8000/wp-content/uploads/2025/11/Bison_bison_Wichita_Mountain_Oklahoma-1024x741.jpg  1024w,
        http://localhost:8000/wp-content/uploads/2025/11/Bison_bison_Wichita_Mountain_Oklahoma-300x217.jpg    300w,
        http://localhost:8000/wp-content/uploads/2025/11/Bison_bison_Wichita_Mountain_Oklahoma-768x556.jpg    768w,
        http://localhost:8000/wp-content/uploads/2025/11/Bison_bison_Wichita_Mountain_Oklahoma-1536x1112.jpg 1536w,
        http://localhost:8000/wp-content/uploads/2025/11/Bison_bison_Wichita_Mountain_Oklahoma-2048x1483.jpg 2048w
      "
      sizes="(max-width: 1024px) 100vw, 1024px"
    />
  </figure>

  <figure
    class="wp-block-image size-large wp-block-hidden-desktop wp-block-hidden-mobile"
  >
    <img
      decoding="async"
      width="1024"
      height="683"
      fetchpriority="auto"
      src="http://localhost:8000/wp-content/uploads/2025/11/Bison_with_its_young-2560w-1024x683.jpg"
      alt="Tablet"
      class="wp-image-37"
      srcset="
        http://localhost:8000/wp-content/uploads/2025/11/Bison_with_its_young-2560w-1024x683.jpg  1024w,
        http://localhost:8000/wp-content/uploads/2025/11/Bison_with_its_young-2560w-300x200.jpg    300w,
        http://localhost:8000/wp-content/uploads/2025/11/Bison_with_its_young-2560w-768x512.jpg    768w,
        http://localhost:8000/wp-content/uploads/2025/11/Bison_with_its_young-2560w-1536x1025.jpg 1536w,
        http://localhost:8000/wp-content/uploads/2025/11/Bison_with_its_young-2560w-2048x1366.jpg 2048w
      "
      sizes="(max-width: 1024px) 100vw, 1024px"
    />
  </figure>

  <figure
    class="wp-block-image size-large wp-block-hidden-mobile wp-block-hidden-tablet"
  >
    <img
      decoding="async"
      width="1024"
      height="668"
      fetchpriority="auto"
      src="http://localhost:8000/wp-content/uploads/2025/11/American_bison_k5680-1-1024x668.jpg"
      alt="Desktop"
      class="wp-image-36"
      srcset="
        http://localhost:8000/wp-content/uploads/2025/11/American_bison_k5680-1-1024x668.jpg  1024w,
        http://localhost:8000/wp-content/uploads/2025/11/American_bison_k5680-1-300x196.jpg    300w,
        http://localhost:8000/wp-content/uploads/2025/11/American_bison_k5680-1-768x501.jpg    768w,
        http://localhost:8000/wp-content/uploads/2025/11/American_bison_k5680-1-1536x1002.jpg 1536w,
        http://localhost:8000/wp-content/uploads/2025/11/American_bison_k5680-1-2048x1336.jpg 2048w
      "
      sizes="(max-width: 1024px) 100vw, 1024px"
    />
  </figure>
</div>

Diff:

--- before.html	2026-03-08 19:01:46
+++ after.html	2026-03-08 19:01:13
@@ -5,10 +5,10 @@
     class="wp-block-image size-large wp-block-hidden-desktop wp-block-hidden-tablet"
   >
     <img
-      fetchpriority="high"
       decoding="async"
       width="1024"
       height="741"
+      fetchpriority="auto"
       src="http://localhost:8000/wp-content/uploads/2025/11/Bison_bison_Wichita_Mountain_Oklahoma-1024x741.jpg"
       alt="Mobile"
       class="wp-image-38"
@@ -30,6 +30,7 @@
       decoding="async"
       width="1024"
       height="683"
+      fetchpriority="auto"
       src="http://localhost:8000/wp-content/uploads/2025/11/Bison_with_its_young-2560w-1024x683.jpg"
       alt="Tablet"
       class="wp-image-37"
@@ -51,6 +52,7 @@
       decoding="async"
       width="1024"
       height="668"
+      fetchpriority="auto"
       src="http://localhost:8000/wp-content/uploads/2025/11/American_bison_k5680-1-1024x668.jpg"
       alt="Desktop"
       class="wp-image-36"

Testing Instructions

Add an Image block with a large image size to a post.
Configure block visibility to hide the block one or two viewports.
Verify that the added IMG on the frontend has fetchpriority=auto as opposed to fetchpriority=high.

… visibility

github-actions · 2026-03-09T02:22:22Z

The following accounts have interacted with this PR and/or linked issues. I will continue to update these lists as activity occurs. You can also manually ask me to refresh this list by adding the props-bot label.

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: westonruter <[email protected]>
Co-authored-by: ramonjd <[email protected]>
Co-authored-by: t-hamano <[email protected]>
Co-authored-by: mukeshpanchal27 <[email protected]>

To understand the WordPress project's expectations around crediting contributors, please review the Contributor Attribution page in the Core Handbook.

github-actions · 2026-03-09T02:47:28Z

Flaky tests detected in 6fedb39.
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/22838257338
📝 Reported issues:

[Flaky Test] User Mention: should allow mention selection via keypress event #48416 in /test/e2e/specs/editor/various/autocomplete-and-mentions.spec.js

ramonjd

Nice catch! Thanks for the PR.

Before

### After

Also checked network priority

Before

After

westonruter · 2026-03-09T03:09:49Z

lib/block-supports/block-visibility.php

+				/*
+				 * Set all IMG tags to be `fetchpriority=auto` so that wp_get_loading_optimization_attributes() won't add
+				 * `fetchpriority=high` or increment the media count to effect whether subsequent IMG tags get `loading=lazy`.
+				 */
+				do {
+					if ( 'IMG' === $processor->get_tag() ) {
+						$processor->set_attribute( 'fetchpriority', 'auto' );
+					}
+				} while ( $processor->next_tag() );


Test case included in core PR: https://github.com/WordPress/wordpress-develop/pull/11196/changes#diff-643478eb4a42b141594dcd64723813a6255c6381e7aa6a30b4d4ac414d1271d1

Co-authored-by: Copilot <[email protected]>

ramonjd · 2026-03-09T04:37:43Z

Use affect instead of effect

I failed the paying attention test :) LGTM

t-hamano

Nice enhancement.

By the way, should we apply a similar approach to the Details block or the Accordion block? This is because these two blocks can have their content hidden by default.

Edit: I found #76269 which applies a similar approach to the Details block

mukeshpanchal27 · 2026-03-09T10:56:26Z

lib/block-supports/block-visibility.php

+				 */
+				do {
+					if ( 'IMG' === $processor->get_tag() ) {
+						$processor->set_attribute( 'fetchpriority', 'auto' );


Question: If an image already had fetchpriority="high" (or low), this will overwrite it, which could be a regression for intentionally prioritized LCP images.

Even though If we set to "auto", this is still a global mutation of all images inside the block HTML.

If the image intentionally had fetchpriority="high" then this still would have been wrong, correct? It is highly unlikely that the block would be intentionally adding this while also being aware that it is in a viewport-conditional block.

t-hamano · 2026-03-10T01:57:50Z

Although this PR does not affect WordPress core, let's backport this PR to wp/7.0 to avoid potential future conflicts in the wp/7.0 branch.

…th conditional viewport visibility to prevent potential erroneous high loading priority (#76302) * Add fetchpriority=low to IMG tags in blocks with conditional viewport visibility * Add backport changelog * Reuse HTML Tag Processor * Use affect instead of effect Co-authored-by: Copilot <[email protected]> --------- Co-authored-by: Copilot <[email protected]> Co-authored-by: westonruter <[email protected]> Co-authored-by: ramonjd <[email protected]> Co-authored-by: t-hamano <[email protected]> Co-authored-by: mukeshpanchal27 <[email protected]>

github-actions · 2026-03-10T02:03:25Z

I just cherry-picked this PR to the wp/7.0 branch to get it included in the next release: 9b81440

This updates the pinned hash from the `gutenberg` from `7b7fa2bc97a8029a302bd6511cf0d206b5953172` to `9b8144036fa5faf75de43d4502ff9809fcf689ad`. The following changes are included: - Use V2 Yjs methods for HTTP Polling (WordPress/gutenberg#76304) - Plugin: Include Icons assets in ZIP (WordPress/gutenberg#75866) - Ensure consistent, repeatable build results when inlining WASM files via `wasmInlinePlugin` (WordPress/gutenberg#76113) - Account `IS_WORDPRESS_CORE` is set. (WordPress/gutenberg#76334) - Block Visibility: Add `fetchpriority=auto` to `IMG` tags in blocks with conditional viewport visibility to prevent potential erroneous high loading priority (WordPress/gutenberg#76302) A full list of changes can be found on GitHub: https://github.com/WordPress/gutenberg/compare/7b7fa2bc97a8029a302bd6511cf0d206b5953172…9b8144036fa5faf75de43d4502ff9809fcf689ad. See #64595, #64393. git-svn-id: https://develop.svn.wordpress.org/trunk@61870 602fd350-edb4-49c9-b593-d223f7449a82

This updates the pinned hash from the `gutenberg` from `7b7fa2bc97a8029a302bd6511cf0d206b5953172` to `9b8144036fa5faf75de43d4502ff9809fcf689ad`. The following changes are included: - Use V2 Yjs methods for HTTP Polling (WordPress/gutenberg#76304) - Plugin: Include Icons assets in ZIP (WordPress/gutenberg#75866) - Ensure consistent, repeatable build results when inlining WASM files via `wasmInlinePlugin` (WordPress/gutenberg#76113) - Account `IS_WORDPRESS_CORE` is set. (WordPress/gutenberg#76334) - Block Visibility: Add `fetchpriority=auto` to `IMG` tags in blocks with conditional viewport visibility to prevent potential erroneous high loading priority (WordPress/gutenberg#76302) A full list of changes can be found on GitHub: https://github.com/WordPress/gutenberg/compare/7b7fa2bc97a8029a302bd6511cf0d206b5953172…9b8144036fa5faf75de43d4502ff9809fcf689ad. See #64595, #64393. Built from https://develop.svn.wordpress.org/trunk@61870 git-svn-id: http://core.svn.wordpress.org/trunk@61157 1a063a9b-81f0-0310-95a4-ce76da25c4cd

westonruter · 2026-03-10T03:51:18Z

By the way, should we apply a similar approach to the Details block or the Accordion block? This is because these two blocks can have their content hidden by default.

@t-hamano Oh, the Accordion block! Yes, we should. I just filed it:

Image in collapsed Accordion block may erroneously get fetchpriority=high even though hidden #76335

PR to fix:

Add fetchpriority=low to IMG tags in collapsed Accordion Item blocks #76336

…w` or `fetchpriority=auto`. This updates `wp_get_loading_optimization_attributes()` and `wp_maybe_add_fetchpriority_high_attr()` to account for cases where an `IMG` has `fetchpriority=low` or `fetchpriority=auto`: * `IMG` tags with `fetchpriority=low` are not lazy-loaded since they may be in a Navigation overlay, Details block, or Accordion Item block and need to be loaded the instant the user toggles the block. * `IMG` tags with `fetchpriority=auto` do not increase the media count since they may be hidden in a viewport by block visibility settings. * Blocks with conditional visibility (such as hidden on mobile or desktop) now automatically add `fetchpriority="auto"` to their contained `IMG` tags to prevent them from erroneously receiving `fetchpriority=high` or affecting the lazy-loading of subsequent images. * An `IMG` with `fetchpriority=auto` which also surpasses the `wp_min_priority_img_pixels` threshold will prevent a subsequent image from getting `fetchpriority=high`. Developed in #11196 Includes backport of [WordPress/gutenberg#76302 Gutenberg#76302]. See related Gutenberg issues: - [WordPress/gutenberg#76181 76181]: Image in navigation overlay can get `fetchpriority=high` and degrade LCP metric for page. - [WordPress/gutenberg#76268 76268]: Image in collapsed Details block may erroneously get `fetchpriority=high` even though hidden. - [WordPress/gutenberg#76301 76301]: Block Visibility: `IMG` in viewport-conditional block may get `fetchpriority=high` even when not displayed. - [WordPress/gutenberg#76335 76335]: Image in collapsed Accordion block may erroneously get `fetchpriority=high` even though hidden. Follow-up to r56347, r56037. Props westonruter, mukesh27, ramonopoly, wildworks. See #58235. Fixes #64823. git-svn-id: https://develop.svn.wordpress.org/trunk@61934 602fd350-edb4-49c9-b593-d223f7449a82

…w` or `fetchpriority=auto`. This updates `wp_get_loading_optimization_attributes()` and `wp_maybe_add_fetchpriority_high_attr()` to account for cases where an `IMG` has `fetchpriority=low` or `fetchpriority=auto`: * `IMG` tags with `fetchpriority=low` are not lazy-loaded since they may be in a Navigation overlay, Details block, or Accordion Item block and need to be loaded the instant the user toggles the block. * `IMG` tags with `fetchpriority=auto` do not increase the media count since they may be hidden in a viewport by block visibility settings. * Blocks with conditional visibility (such as hidden on mobile or desktop) now automatically add `fetchpriority="auto"` to their contained `IMG` tags to prevent them from erroneously receiving `fetchpriority=high` or affecting the lazy-loading of subsequent images. * An `IMG` with `fetchpriority=auto` which also surpasses the `wp_min_priority_img_pixels` threshold will prevent a subsequent image from getting `fetchpriority=high`. Developed in WordPress/wordpress-develop#11196 Includes backport of [WordPress/gutenberg#76302 Gutenberg#76302]. See related Gutenberg issues: - [WordPress/gutenberg#76181 76181]: Image in navigation overlay can get `fetchpriority=high` and degrade LCP metric for page. - [WordPress/gutenberg#76268 76268]: Image in collapsed Details block may erroneously get `fetchpriority=high` even though hidden. - [WordPress/gutenberg#76301 76301]: Block Visibility: `IMG` in viewport-conditional block may get `fetchpriority=high` even when not displayed. - [WordPress/gutenberg#76335 76335]: Image in collapsed Accordion block may erroneously get `fetchpriority=high` even though hidden. Follow-up to r56347, r56037. Props westonruter, mukesh27, ramonopoly, wildworks. See #58235. Fixes #64823. Built from https://develop.svn.wordpress.org/trunk@61934 git-svn-id: http://core.svn.wordpress.org/trunk@61216 1a063a9b-81f0-0310-95a4-ce76da25c4cd

Add fetchpriority=low to IMG tags in blocks with conditional viewport…

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westonruter requested a review from spacedmonkey as a code owner March 9, 2026 02:04

westonruter added [Type] Performance Related to performance efforts [Feature] Design Tools Tools that impact the appearance of blocks both to expand the number of tools and improve the experi labels Mar 9, 2026

westonruter requested review from ramonjd and t-hamano March 9, 2026 02:05

westonruter added this to the Gutenberg 22.8 milestone Mar 9, 2026

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Add support for IMG tags with fetchpriority=low or fetchpriority=auto WordPress/wordpress-develop#11196

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Backport WordPress/gutenberg#76302

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Reuse HTML Tag Processor

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Use affect instead of effect

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Co-authored-by: Copilot <[email protected]>

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westonruter merged commit d207a27 into trunk Mar 9, 2026
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PHP backports for WP 7.0 #74043

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Update the pinned gutenberg hash WordPress/wordpress-develop#11214

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Add fetchpriority=low to IMG tags in collapsed Accordion Item blocks #76336

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Image in collapsed Accordion block may erroneously get fetchpriority=high even though hidden #76335

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Block Visibility: Add `fetchpriority=auto` to `IMG` tags in blocks with conditional viewport visibility to prevent potential erroneous high loading priority#76302

Block Visibility: Add `fetchpriority=auto` to `IMG` tags in blocks with conditional viewport visibility to prevent potential erroneous high loading priority#76302
westonruter merged 4 commits intotrunkfrom
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