Svelte 4/5 incompatibility: exporting the same variable with two names breaks the export. about svelte HOT 2 CLOSED

This never worked correctly in Svelte 4. Only a2 would ever be accepted as a prop, a1 is essentially ignored: If you do <Comp a1="2"></Comp> you get thefallback value. What is different in Svelte 5 is that the first reexport wins whereas in Svelte 4 the last reexport wins.

Curious: Is this an actual use case in your library? Or just something that you happened to discover? Tempted to not fix it if it isn't a simple two-line change because I can't imagine someone using this, since it doesn't work as pointed out above.

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I was using it for some compatibility purposes between versions: in an old version the attribute was called X and in the new version it was called Y. So for a transition period, both attributes were accepted. But I guess it's not worth putting effort in then. It's (a) easy to work around and (b) probably a niche use case anyway. Thanks for clearing this up though!

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