fix: typecheck in preact jsx.d.ts due to type change related to signals

[robertmaier]

as reported in preactjs/preact#3934 the default property in RoutableProps breaks typechecks in Preact's jsx.d.ts file.
This is caused by the addition of Signals to Preact, after which the property is defined as boolean | undefined | SignalLike<boolean | undefined> instead of a plain optional boolean.

The type ends up in preact's types because of namespace declaration merging.

@marvinhagemeister suggested to remove the default definition in preact-router here. Which is why I would suggest to also do this in preact-iso

An alternative solution would be to remove the type merging overall, but I don't have too much knowledge where the type is used.

[changeset-bot]

🦋 Changeset detected

Latest commit: 6116504

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
preact-iso	Patch

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[rschristian]

Thanks for the PR!

Did you check that the types work correct? I don't think they would, as IntriniscAttributes needs to have RouteableProps else something like this wouldn't work: <Home default />. I think we need to exclude the HTMLAttributes's default from IntrinsicAttributes instead

[robertmaier]

@rschristian Thanks for haveing a first look. So you'd propose to do something like

type IntrinsicAttributes = Omit<preact.JSX.IntrinsicAttributes, 'default'>

if I understand correctly?
I'll have a look if it solves our typecheck issue and let you know how it went.

[rschristian]

I think so? I'm admittedly not a huge fan of TS, but I think that's what we'd need to do, or something along those lines anyways.

It's weird (to me, anyways) that this is an issue though, as default shouldn't exist on components to cause conflicts. <Foo default /> shouldn't work (without these routers' types), so I'm not really sure I understand what the conflict is, if that makes sense.