TypeScript's built-in Omit utility type breaks discriminated unions by treating them as a whole rather than distributing over each union member. This causes type errors when building wrapper components that depend on discriminated union props. A distributive version using conditional types (T extends any ? Omit<T, K> : never) preserves the union structure by applying Omit to each member individually. This solution also provides stricter type checking by constraining keys to those that actually exist on the type.
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Discriminated Union TypesDistributive Conditional TypesDistributive OmitLimited Keys31.1K Impressions