S
SolidJS•8mo ago
Jakob

`<Dynamic>` function prop args are `any`

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11 Replies
Jasmin
Jasmin•8mo ago
Interesting :thinkies: Typescript just seems to give up if you hover on the onValueChange prop it's typed correctly. Maybe @jer3m01 or @Otonashi know why this is happening
Otonashi
Otonashi•8mo ago
afaict this is caused by https://github.com/solidjs/solid/pull/1248, which intentionally adds some magic to prevent the type of props from affecting the inferred type of component; not sure what to do about it reverting the pr and applying
- export type ValidComponent = keyof JSX.IntrinsicElements | Component<any> | (string & {});
+ export type ValidComponent = keyof JSX.IntrinsicElements | Component<never> | (string & {});
- export type ValidComponent = keyof JSX.IntrinsicElements | Component<any> | (string & {});
+ export type ValidComponent = keyof JSX.IntrinsicElements | Component<never> | (string & {});
seems promising, but that breaks accessing props.component so anyone relying on that will have to work around it i'm not sure if there's a better supertype in this case, ideally it would be something like Component<{ [x: string]?: unknown }> but that's invalid ts
mdynnl
mdynnl•7mo ago
strange thing is it seems to infer correctly when there's an error lol
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mdynnl
mdynnl•7mo ago
tbh i don't know what i was doing playing around typescript with basic ts knowledge 😆
Jasmin
Jasmin•7mo ago
typescript often stops checking if there is an error at an other place. this is common
mdynnl
mdynnl•7mo ago
like multiple passes right? even then it would still check as much as possible. at least that's what it seems to me
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Otonashi
Otonashi•7mo ago
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Otonashi
Otonashi•7mo ago
not just any error that causes inference to change my guess is if the shape of the props is invalid typescript recalculates them, otherwise it doesn't jsx ignores properties with hyphens
Otonashi
Otonashi•7mo ago
not sure why the function call form works differently but changing the type of value gives a similar result
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Otonashi
Otonashi•7mo ago
so initially it resolves onValueChange to any => any, which will pass a check against the presumably later resolved generic constraint however if the props fail overall then it'll rerun and narrow onValueChange to string => void (only to fail for the initial reason) well everything is a guess without knowing ts internals
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