Summary:
caretRangeFromPoint is a non-standard API for obtaining a Range object
(node and position within node) from pixel coordinates, similar to
caretPositionFromPoint. It has been available in Blink/WebKit since
2010, and recently there has been an attempt to standardize it. The
web-platform-tests have already been accepted.
Implementing caretRangeFromPoint allows us to fix
caretPositionFromPoint’s shadow DOM behavior without introducing
regressions, as discussed here:
https://bugzilla.mozilla.org/show_bug.cgi?id=1927838
<https://bugzilla.mozilla.org/show_bug.cgi?id=1927838>.
Bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1550635
<https://bugzilla.mozilla.org/show_bug.cgi?id=1550635>
Specification proposal: https://github.com/w3c/csswg-drafts/pull/12362
<https://github.com/w3c/csswg-drafts/pull/12362>
Standards body: W3C
Platform coverage: all
Preference: dom.caretRangeFromPoint.enabled
Other browsers:
Chrome: shipped since version 4
Safari: shipped since version 5
web-platform-tests: https://github.com/web-platform-tests/wpt/pull/54409
<https://github.com/web-platform-tests/wpt/pull/54409>
DevTools bug: N/A
Extensions bug: N/A
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