fix: explicitly add key in Children.map
#660
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…y key (and React does it).
meowtec
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preact'sChildren.mapbehaves differently from what react does:React will clone the key from original child to mapped child, but preact will not.
I use
react-swipeable-viewswith preact (aliasreacttopreact), and that will cause some problem.So it would be better to clone the key explicitly.