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on this file since ceaed42 was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago |
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[6a3a178] | 1 | import {Except} from './except';
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| 2 | import {ConditionalKeys} from './conditional-keys';
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| 3 |
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| 4 | /**
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| 5 | Exclude keys from a shape that matches the given `Condition`.
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| 6 |
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| 7 | 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.
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| 8 |
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| 9 | @example
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| 10 | ```
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| 11 | import {Primitive, ConditionalExcept} from 'type-fest';
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| 12 |
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| 13 | class Awesome {
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| 14 | name: string;
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| 15 | successes: number;
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| 16 | failures: bigint;
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| 17 |
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| 18 | run() {}
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| 19 | }
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| 20 |
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| 21 | type ExceptPrimitivesFromAwesome = ConditionalExcept<Awesome, Primitive>;
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| 22 | //=> {run: () => void}
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| 23 | ```
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| 24 |
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| 25 | @example
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| 26 | ```
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| 27 | import {ConditionalExcept} from 'type-fest';
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| 28 |
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| 29 | interface Example {
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| 30 | a: string;
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| 31 | b: string | number;
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| 32 | c: () => void;
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| 33 | d: {};
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| 34 | }
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| 35 |
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| 36 | type NonStringKeysOnly = ConditionalExcept<Example, string>;
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| 37 | //=> {b: string | number; c: () => void; d: {}}
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| 38 | ```
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| 39 | */
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| 40 | export type ConditionalExcept<Base, Condition> = Except<
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| 41 | Base,
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| 42 | ConditionalKeys<Base, Condition>
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| 43 | >;
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