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[@mantine/form] fix type inference of validation for union types #3101

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Dec 4, 2022
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[@mantine/form] fix type inference of validation for union types #3101

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4 changes: 2 additions & 2 deletions src/mantine-form/src/types.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -21,15 +21,15 @@ export interface ReorderPayload {

type Rule<Value, Values> = (value: Value, values: Values, path: string) => React.ReactNode;

type FormRule<Value, Values> = Value extends Array<infer ListValue>
type FormRule<Value, Values> = NonNullable<Value> extends Array<infer ListValue>
?
| Partial<{
[Key in keyof ListValue]: ListValue[Key] extends Array<infer NestedListItem>
? FormRulesRecord<NestedListItem> | Rule<ListValue[Key], Values>
: FormRulesRecord<ListValue[Key]> | Rule<ListValue[Key], Values>;
}>
| Rule<Value, Values>
: Value extends Record<string, unknown>
: NonNullable<Value> extends Record<string, unknown>
? FormRulesRecord<Value> | Rule<Value, Values>
: Rule<Value, Values>;

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