Pull Request resolves # .

• I read the Generative AI policy and my contribution is either not created with the help of AI or is compatible with the policy and GNU/GPL 2 or later.

Summary of Changes

Fixes numerous tinymce bugs

Added

Added editor.announce() for posting messages to screen readers via an aria-live region.

Improved

Removed 300 item limit on the emoticons dialog 'All' tab by optimising render performance.

Pressing Tab or Shift+Tab on an open menu now closes it and moves focus to the next or previous focusable element.

The editor resize handle now uses browser pointer events for more reliable behaviour across different integration environments.

Changed

Changed LESS math mode from always to parens-division.

Fixed

CSS custom property names and color values in the style attribute were being lowercased when parsed.

Focused links in dark mode was having the same text color as the background.

Using the undo keyboard shortcut did not restore editor selection correctly.

Worked around a Chromium bug where clicking on the right of an li could fail.

Some annotated text was hidden when printed even though it should have been visible.

Deleting a newline within a list item would delete the list item.

Context toolbar with position 'line' was not repositioning to the opposite side when overflowing the viewport.

Block-level formatting did not work on parent blocks when a contenteditable="false" inline element (such as an iframe) was selected.

Selecting multiple table cells and applying indentation did not apply to the entire selection.

Selecting multiple table cells and applying multiple formats could incorrectly nest formatting tags.

Dragging and dropping or copying and pasting an image didn’t add width and height to the tag.

Tooltips were clipped when the editor was hosted in a shadow DOM and its parent element had overflow:scroll.

8.6.0 - 2026-06-03

Testing Instructions

As this is a js change either use a prebuilt package or npm ci
tinymce should work as normal

Actual result BEFORE applying this Pull Request

tinymce reports as version 8.6.0

Expected result AFTER applying this Pull Request

tinymce reports as version 8.7.0

Link to documentations

Please select:

• Documentation link for guide.joomla.org:

• No documentation changes for guide.joomla.org needed

• Pull Request link for manual.joomla.org:

• No documentation changes for manual.joomla.org needed