1563704 - When selecting one range in light DOM and one range in Shadow DOM, only one of them is visually highlighted

Status: RESOLVED DUPLICATE of bug 1455893

(Core :: DOM: Selection, defect, P2)

Description

[Mirko Brodesser (:mbrodesser-Igalia)]

Attachment: select_multiple_ranges_with_shadow_dom.html

STR:
Open the attached example, which selects three ranges (two light DOM, one Shadow DOM) .

Expected:
all three ranges are visually highlighted.

Actual:
only the range added last to the selection is visually highlighted.

Changing the order of adding the ranges determines which one is highlighted after all have been added.

I'm aware that the Selection API per spec doesn't support selecting Shadow DOM nodes. However, fixing this issue should pave the way for supporting selection across Shadow DOM boundaries. Not necessarily via the Selection API, but for an end-user visually selecting text.

Comment 1

[Mirko Brodesser (:mbrodesser-Igalia)]

Attachment: Bug 1563704: part 1) Add test selecting distinct ranges in light DOM and shadow DOM.

Comment 2

[Mirko Brodesser (:mbrodesser-Igalia)]

Won't have time to work on this soon.

Comment 3

[Sean Feng [:sefeng]]

This is now fixed in Nightly Firefox