Can we exclude specific properties from an object using a mapped type based on their value? Similar to the Omit function, but focusing on the values rather than the keys.
Let's consider the following example:
type Q = {a: number, b: never}
Is there a way to remove property b because its value is never?
I recently discovered a new way to create a helper type that is similar to the Omit type, as shown below:
type RemovePropsByValue<T, V> = {
[K in keyof T as T[K] extends V ? never : K]: T[K];
};
This helper type can be applied in the following manner:
type Q = {a: number, b: never}
type FilteredQ = RemovePropsByValue<Q, never>; // results in {a: number}
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