type-fest/source/conditional-except.d.ts
2025-11-30 04:44:57 +07:00

48 lines
1.1 KiB
TypeScript

import type {Except} from './except.d.ts';
import type {ConditionalKeys} from './conditional-keys.d.ts';
/**
Exclude keys from a shape that matches the given `Condition`.
This is useful when you want to create a new type with a specific set of keys from a shape. For example, you might want to exclude all the primitive properties from a class and form a new shape containing everything but the primitive properties.
@example
```
import type {Primitive, ConditionalExcept} from 'type-fest';
class Awesome {
constructor(public name: string, public successes: number, public failures: bigint) {}
run() {
// do something
}
}
type ExceptPrimitivesFromAwesome = ConditionalExcept<Awesome, Primitive>;
//=> {run: () => void}
```
@example
```
import type {ConditionalExcept} from 'type-fest';
type Example = {
a: string;
b: string | number;
c: () => void;
d: {};
};
type NonStringKeysOnly = ConditionalExcept<Example, string>;
//=> {b: string | number; c: () => void; d: {}}
```
@category Object
*/
export type ConditionalExcept<Base, Condition> = Except<
Base,
ConditionalKeys<Base, Condition>
>;
export {};