[Webkit-unassigned] [Bug 236598] New: AX: manually blurring a focused element resets tab navigation to the start of the document

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=236598

            Bug ID: 236598
           Summary: AX: manually blurring a focused element resets tab
                    navigation to the start of the document
           Product: WebKit
           Version: Safari 15
          Hardware: All
                OS: macOS 10.15
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Accessibility
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: aleksandrhovhannisyan at gmail.com
                CC: andresg_22 at apple.com,
                    webkit-bug-importer at group.apple.com

Summary: In Chrome 98 and Firefox 97, both on Windows 10 and macOS Catalina, .blurring() a focused element with JavaScript maintains a "ghost" focus state at that location in the document, such that when a user presses the tab key to navigate forward in the document, they move to the next focusable element on the page. In Safari, manually firing the .blur() event destroys keyboard focus, such that the next tab event proceeds from the start of the document rather than where it left off when .blur() was called.

Reproducible examples:
- CodePen demo of managing focus with load-more buttons and dynamically loaded content: https://codepen.io/AleksandrHovhannisyan/pen/rNGOBKv.
- Minimal toy example: https://jsfiddle.net/mujdq29k/.

Expectation: Safari should behave the same as Chrome and Firefox. Blurring a focused element should not reset focus to the start of the document.

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