20 lines
465 B
TypeScript
20 lines
465 B
TypeScript
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//////////////////////
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type OriginalType = {
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key1: { sub1: string; sub2: string };
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key2: { subA: string; subB: string };
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};
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type ValidKeys = keyof OriginalType;
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type ValidSubKeys<K extends ValidKeys> = keyof OriginalType[K];
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type EnforcedRecord = {
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[K in ValidKeys]: ValidSubKeys<K>[];
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};
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// Example usage:
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const example: EnforcedRecord = {
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key1: ['sub1', 'sub2'],
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key2: ['subA', 'subB', "sub1"], // last is invalid
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};
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