bug: fresh islands are broken with preact 1.22.1 #2587
Description
Fresh island rendering is broken in preact 1.22.1
Bug
children.js:123 Uncaught (in promise) TypeError: n2.contains is not a function
at S (children.js:123:16)
at O (index.js:246:4)
at S (children.js:85:3)
at O (index.js:246:4)
at B (render.js:37:2)
at _render (main.ts:109:7)
It seems that fresh root fragments of islands are missing contains method.
Bug reason
The PR replace isConnected with parentDom.contains #4421 breaks fresh island rendering with new contains method.