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Script Loader: Prefetch assets for the next admin screen - #13084

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westonruter wants to merge 77 commits into

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westonruter:add/admin-script-style-preloading

Commits on Aug 16, 2026
- Preload the admin's unconcatenated assets from the login screen
  
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  b3809c8
- Prefetch rather than preload the admin's assets from the login screen
  
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  8789351
- Drop the redundant fetchpriority attribute from the admin prefetch links
  
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  879ce15
- Only prefetch admin assets when the login actually leads to the admin
  
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  98b2ee1
- Pass the login redirect target to the admin asset prefetch filter
  
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  0db2f11
Commits on Aug 17, 2026
- Prefetch the editor's stylesheets from the screens that lead to it
  
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  fa3677e
Commits on Aug 18, 2026
- Type the handle expander against WP_Dependencies
  
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  cefa78d
- Keep empty handles out of the expanded dependency set
  
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  814fcd7
- Simplify cap check
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  6ad32b5
Commits on Aug 19, 2026
- Model the prefetch resource list on wp_preload_resources()
  
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  d80705e
- Stop implying the prefetch filter only takes scripts and styles
  
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  c6c18bb
- Carry each registry alongside the handles it registered
  
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  a12640f
- Stop naming the login screen where any screen is meant
  
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  cec3373
- Inline the block editor check into its only caller
  
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  a6ab6ba
- Remove default priority from add_action()
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  7a646ea
- Say why the URL resolver names two registries and not their parent
  
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  8fea842
Commits on Sep 26, 2026
Commits on Sep 27, 2026
- Derive the login prefetch set from root handles
  
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  81f72fd
- Share URL building between do_item() and the admin prefetch
  
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  8a36ca8
- Add tests for WP_Scripts::get_src() and WP_Styles::get_rtl_href()
  
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  176c7e4
- Note where the login prefetch roots are enqueued
  
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  a01bb6b
- Drop the redundant wp-pointer prefetch root
  
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  9b63a14
- Drop the redundant editor prefetch roots
  
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  debcf11
- Note where the editor prefetch roots are enqueued
  
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  68844a5
- Add tests for wp_prefetch_admin_assets()
  
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  6893636
- Enhance comment on resource attributes in script-loader
  
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  35b06f6
- Fix Copilot's broken indent in 35b06f6479c42caa164f7c269457da5d6313b6a9
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  4524a2d
- Clarify when the prefetch URLs may not match the admin's
  
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  6368d7a
- Use the login action wp-login.php resolved
  
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  2b11401
- Skip the login prefetch when redirecting to another host
  
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  4e14337
- Derive the prefetch tests' URLs from the site's own
  
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  30703db
- Test that network and user Dashboards prefetch nothing
  
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  d4f6bf8
- Pass stylesheet URLs to the prefetch filter unescaped
  
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  d40ea0f
Commits on Sep 28, 2026
- Add WP_Styles::get_src() and rename get_rtl_href() to get_rtl_src()
  
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  73bce09
Commits on Sep 29, 2026
- Check edit_posts rather than create_posts before prefetching the editor
  
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  c0dcfb9
- Prefetch with fetch() in browsers without rel=prefetch
  
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  89d909c
Commits on Oct 2, 2026
- Share the concatenation default between script_concat_settings() and prefetching
  
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  21a718e
- Correct comment formatting in wpShouldConcatenateAdminScripts test
  
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  49c1fe5
- Restore the $concatenate_scripts global in tear_down()
  
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  88bf79a
Commits on Oct 3, 2026
- Sanitize the right-to-left stylesheet URL only once when printing it
  
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  f172c60
- Skip prefetching from the login screen for an admin under another scheme
  
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  b00c19c
- Skip prefetch URLs that esc_url() rejects
  
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  9b752fe
- Merge branch 'trunk' of https://github.com/WordPress/wordpress-develop into add/admin-script-style-preloading
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  20a86b0
- Prefetch from the login screen after its footer scripts
  
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  5941696
- Hook admin prefetching in admin-filters.php
  
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  329b924
- Check the block editor before prefetching its stylesheets from the login screen
  
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  34746c5
- Tell the login screen apart by the request, and prefetch on all of its screens
  
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  52bfff2
- Treat an empty redirect_to as none when prefetching from the login screen
  
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  7105005
- Skip what the current screen has queued, not only what it has printed
  
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  2fa8166
- Test the login screen's prefetching with the hooks default-filters.php registers
  
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  9f0261a
- Check the block editor for the editor's post type in one place
  
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  ff4c4d1
- Skip expanding the current screen's queue for a type with no roots
  
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  20e51e3
- Call admin_url() once when resolving the login screen's destination
  
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  3e9ae03
- Document when to add a wp_should_concatenate_admin_scripts callback, and that it is temporary
  
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  49606b5
- Prefetch for a redirect_to of the admin without its trailing slash
  
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  355774c
- Return the new get_src() and get_rtl_src() URLs unsanitized
  
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  578f84e
- Skip prefetching handles the next screen would print nothing for
  
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  7257f45
- Name WP_Dependencies::add_data() with :: in its deprecation notice
  
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  01353f4
- Merge branch 'trunk' of https://github.com/WordPress/wordpress-develop into add/admin-script-style-preloading
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  368320a
- Recognize the login screen by 'login_init' rather than is_login()
  
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  d3ea128
- Resolve redirect_to with wp_validate_redirect() alone, as wp_safe_redirect() does
  
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  96c9d80
- Treat a redirect_to's explicit default port as the admin's own
  
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  e4c4eb1
- Allow only http and https URLs among the prefetched resources
  
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  acae9f7
- Clarify which sources WP_Styles::get_src() returns no URL for
  
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  eb0e614
Commits on Oct 4, 2026
- Give the right-to-left stylesheet the same version and arguments as its style
  
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  d706ef8
Commits on Oct 6, 2026
- Merge branch 'trunk' into add/admin-script-style-preloading
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  81cf946
- Name variable to indicate already escaped
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  7fe9568
- Type the prefetch links in the inline script as HTMLLinkElement
  
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  5a0cfaf
- Merge branch 'trunk' into add/admin-script-style-preloading
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  8bc35b5
- Rename the prefetch_admin_assets filter to wp_prefetch_admin_assets
  
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  cf6e2a6
- Use the HTML Tag Processor to find the login footer's jQuery script and prefetch links
  
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  ebba75b
- Type the as value of the prefetch test helpers as 'script'|'style'
  
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  2a5c724
- Test that an escaped copy of a prefetched URL is collapsed with it
  
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  e514355

Commits

Commits on Aug 16, 2026

Commits on Aug 17, 2026

Commits on Aug 18, 2026

Commits on Aug 19, 2026

Commits on Sep 26, 2026

Commits on Sep 27, 2026

Commits on Sep 28, 2026

Commits on Sep 29, 2026

Commits on Oct 2, 2026

Commits on Oct 3, 2026

Commits on Oct 4, 2026

Commits on Oct 6, 2026