[Webkit-unassigned] [Bug 217350] New: Text input element with step attribute does not scroll into view when setting focus and selection

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=217350

            Bug ID: 217350
           Summary: Text input element with step attribute does not scroll
                    into view when setting focus and selection
           Product: WebKit
           Version: Safari 14
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Forms
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: adam at reineke.me
                CC: cdumez at apple.com, wenson_hsieh at apple.com

Created attachment 410580

  --> https://bugs.webkit.org/attachment.cgi?id=410580&action=review

Min repro for the bug

The input element receives focus but does not scroll into view if you call focus() and a selection API on an input element with the step attribute (except when the exact text selection was already set).

Repro:

1. input type=text with the step attribute set. Note: Any value for step seems to work. I use the empty string.
2. Scroll input off-screen
3. Send focus and set selection at the same time.
 - Note: Setting the selection via any of the selection APIs hits the bug: .select(), .selectionStart and .selectionEnd together, or .setSelectionRange().
 - Note: The selection being set must be different than the current selection to hit the bug.
 - Note: If you click one of the select buttons on the left twice in a row, the input will scroll into view because text selection was unchanged.

Version: Tested in Safari 14.0 (15610.1.28.1.9, 15610) and Safari Technology Preview (Release 113, Safari 14.0.1, Webkit 15610.2.3.1). I expect it also happens in Safari 13 based on the bug report I was investigating when I reduced to this min-repro.

Tested on Mac desktop only.

Test file attached with min repro.

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