1822311 - Add support for "xpath" strategy for "WebDriver:FindElementFromShadowRoot" and "WebDriver:FindElementsFromShadowRoot" commands

Status: NEW

(Remote Protocol :: Marionette, task, P3)

Description

[Alexandra Borovova [:Sasha]]

As soon as shadow root supports xpath search, we should be able to have the support for xpath strategy in WebDriver:FindElementFromShadowRoot and WebDriver:FindElementsFromShadowRoot commands, most likely we would need only to enable the wpt tests: https://searchfox.org/mozilla-central/source/testing/web-platform/tests/webdriver/tests/find_element_from_shadow_root/find.py#156 and https://searchfox.org/mozilla-central/source/testing/web-platform/tests/webdriver/tests/find_elements_from_shadow_root/find.py#157.

Comment 1

[Henrik Skupin [:whimboo][⌚️UTC+1]]

So this is a limitation by the HTML spec, right? Is there maybe any open issue where a discussion for that topic might have happened?

Comment 2

[Alexandra Borovova [:Sasha]]

(In reply to Henrik Skupin [:whimboo][⌚️UTC+1] from comment #1)

So this is a limitation by the HTML spec, right? Is there maybe any open issue where a discussion for that topic might have happened?

I didn't find, unfortunately, anything.

Comment 3

[Henrik Skupin [:whimboo][⌚️UTC+1]]

XPath is deprecated and shouldn't change anymore. https://www.w3.org/TR/DOM-Level-3-XPath/ is also retired and should not be used anymore.

Based on wpt.fyi results all browsers are failing here.

James, shall we add a notice to the appropriate APIs in the WebDriver classic spec that XPath locators will not be supported within ShadowRoot searches? Then we can also close this bug as wontfix.

Comment 4

[James Graham [:jgraham]]

I think that's correct per spec at the moment. If there's pushback from WebDriver users (which would be understandable) we should revisit what's possible with the WG.

Comment 5

[Henrik Skupin [:whimboo][⌚️UTC+1]]

Here is the related WebDriver classic specification issue: https://github.com/w3c/webdriver/issues/1610