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[Web] v3 typing and using handler data #3651
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packages/react-native-gesture-handler/src/web/handlers/GestureHandler.ts
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packages/react-native-gesture-handler/src/web/handlers/GestureHandler.ts
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packages/react-native-gesture-handler/src/web/tools/GestureHandlerWebDelegate.ts
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type ResultEventType = GestureHandlerEvent<unknown> | GestureHandlerNativeEvent; | ||
export interface ResultEvent<T extends ResultEventType = ResultEventType> | ||
extends Record<string, T | number> { | ||
nativeEvent: T; |
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Correct me if I'm wrong, but GestureHandlerEvent
already has nativeEvent
field (look here for context). In that case, we will have event type where it is possible to have nativeEvent.nativeEvent
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Also I find it quite confusing with this default value, wouldn't it be easier to read if we had just ResultEvent<T>
and then pass either GestureHandlerEvent
, GestureHandlerNativeEvent
or TouchEvent
?
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Correct me if I'm wrong, but GestureHandlerEvent already has nativeEvent
No, types in GestureHandlerEvent are wrappers on payload types defined here, and only add handlerData
. Those types do not have nativeEvent
field
Also I find it quite confusing with this default value
Ok, it was inspired by this. I thought that it would simplify the code as we would not have to write <unknown>
everywhere. I don't have a strong preference, if you think it's better to add <unknown>
i can change it.
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if you think it's better to add i can change it.
What do you think I should do? I feel that current solution is stronger typed, what I think is better
packages/react-native-gesture-handler/src/web/handlers/GestureHandler.ts
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@@ -369,7 +370,7 @@ export default abstract class GestureHandler implements IGestureHandler { | |||
const { onGestureHandlerEvent, onGestureHandlerTouchEvent }: PropsRef = | |||
this.propsRef!.current; | |||
|
|||
const touchEvent: ResultTouchEvent | undefined = | |||
const touchEvent: ResultEvent<TouchEvent> | undefined = |
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Are you sure that TouchEvent
will have correct fields and won't expose something that we do not provide?
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Yes, gestureTouchEvent
defined here, on which TouchEvent
is a union has the same fields as the old nativeTouchEvent
defined within web/interfaces.
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Now when I think about it we could probably do the same for GestureHandlerNativeEvent
, is there a reason why v2 redeclared those types for the web, when we already have similar types in commons?
EDIT: ok, nevermind they have conflicting type
packages/react-native-gesture-handler/src/web/handlers/GestureHandler.ts
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packages/react-native-gesture-handler/src/web/handlers/GestureHandler.ts
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LGTM
Description
Changing web implementation to use v3 types with a proper
handlerData
field.Test plan
check whether
handledData
is a proper field ofnativeEvent
when usingNativeDetector
.