[7.1][Misc Dev Note] Miscelaneous Dev Notes #2429

Trac tickets

• #65483 — Improve UTF-8 scanning performance with codepoint limits
• #64695 — Global Styles: Support css feature selector for block custom CSS
• #65482 — Strip inline note markers from rendered block output
• #65544 — Allow layout values to be unset in viewport states
• #65561 — Styles: preserve important gradient declarations for statu
• #65068 — PHP warnings when a registered oEmbed provider is malformed
• #65098 — get_site_icon_url() returns empty string even when fallback is defined, breaking wp-embed-site-icon in the_embed_site_title()
• #64576 — Add support for invoker command attributes
• #65457 — KSES: Inline styles related to SVG will be removed
• #65592 — Block visibility: add theme json opt out
• #64915 — Media: Enable HEIC/HEIF uploads when server lacks image editor support
• #65399 — Skip Document-Isolation-Policy on the classic-theme site preview
• #65549 — Media: Sideload animated GIF → video companions and clean them up on delete
• #65643 — Media: Fix sideload and finalize for EXIF rotated images
• #65664 — Media: GIF to video conversion fails because the video-conversion worker is missing from the import map
• #65673 — Media: Previews for offloaded media broken by crossorigin="anonymous"
• #58291 — Speed up WordPress hooks addition/removal by ~20%
• #65260 — Emoji detection script breaks the script modules import map in the Site Editor
• #65317 — Removal of HTML5 script theme support affects older theme gallery layout in frontend

Summary

[7.1][Misc Dev Note] Miscelaneous Dev Notes

Documentation decision

Misc Dev Note

Affected developers

• Developers integrating with the Charset component
• Developers integrating with the Editor component
• Developers integrating with the Embeds component
• Developers integrating with the Formatting component
• Developers integrating with the General component
• Developers integrating with the Media component
• Developers integrating with the Plugins component
• Developers integrating with the Script Loader component

Related work

Trac tickets

• #65483
• #64695
• #65482
• #65544
• #65561
• #65068
• #65098
• #64576
• #65457
• #65592
• #64915
• #65399
• #65549
• #65643
• #65664
• #65673
• #58291
• #65260
• #65317

Pull requests

• See the linked Trac tickets for associated pull requests.

Changesets

• See the linked Trac tickets for committed changesets.

Suggested Dev Note coverage

• Summarize the related changes together
• Link to relevant API references and examples
• Note compatibility or integration considerations

Triage metadata

• Components: Charset, Editor, Embeds, Formatting, General, Media, Plugins, Script Loader
• Trac types: defect (bug), enhancement
• Ticket count: 19