fix(runtime): v5 non-shadow slot forwarding to better match native behaviour - #6814
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johnjenkins wants to merge 4 commits into
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fix(runtime): v5 non-shadow slot forwarding to better match native behaviour#6814johnjenkins wants to merge 4 commits into
johnjenkins wants to merge 4 commits into
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August 8, 2026 01:17
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What is the current behavior?
GitHub Issue Number: #6770
What is the new behavior?
Fixes #6770
Tackling this issue raised lots of rough edges around non-shadow
<slot>forwarding - all of which lead to unexpected / non-native behaviour.slot forwarding logic revolved around corresponding
nameattributes.. i.e.cmp-a's slot would try be forwarded to cmp-b's slot (and dynamically fail as per the linked issue).
This is incorrect - cmp-a's slot must also have a corresponding
slotto forward.. otherwise it should go to the default slot, or be hidden if there is no default slot.This PR roles in a number of small fixes to better align slot forwarding to the spec with 3 scenarios tested for:
This was tested for and fixed for initial hydration and dynamic insertion and removal
Tested against the linked repro
Documentation
Does this introduce a breaking change?
Strictly not, but if users were relying on the broken behaviour then it could be perceived as breaking ... so I'm going to roll into v5
Testing
Other information