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schema.d.ts
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schema.d.ts
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/**
Create a deep version of another object type where property values are recursively replaced into a given value type.
Use-cases:
- Form validation: Define how each field should be validated.
- Form settings: Define configuration for input fields.
- Parsing: Define types that specify special behavior for specific fields.
@example
```
import type {Schema} from 'type-fest';
interface User {
id: string;
name: {
firstname: string;
lastname: string;
};
created: Date;
active: boolean;
passwordHash: string;
}
type UserMask = Schema<User, 'mask' | 'hide' | 'show'>;
const userMaskSettings: UserMask = {
id: 'show',
name: {
firstname: 'show',
lastname: 'mask',
},
created: 'show',
active: 'show',
passwordHash: 'hide',
}
```
@category Object
*/
export type Schema<ObjectType, ValueType> = ObjectType extends string
? ValueType
: ObjectType extends Map<unknown, unknown>
? ValueType
: ObjectType extends Set<unknown>
? ValueType
: ObjectType extends ReadonlyMap<unknown, unknown>
? ValueType
: ObjectType extends ReadonlySet<unknown>
? ValueType
: ObjectType extends Array<infer U>
? Array<Schema<U, ValueType>>
: ObjectType extends (...arguments_: unknown[]) => unknown
? ValueType
: ObjectType extends Date
? ValueType
: ObjectType extends Function
? ValueType
: ObjectType extends RegExp
? ValueType
: ObjectType extends object
? SchemaObject<ObjectType, ValueType>
: ValueType;
/**
Same as `Schema`, but accepts only `object`s as inputs. Internal helper for `Schema`.
*/
type SchemaObject<ObjectType extends object, K> = {
[KeyType in keyof ObjectType]: ObjectType[KeyType] extends readonly unknown[] | unknown[]
? Schema<ObjectType[KeyType], K>
: Schema<ObjectType[KeyType], K> | K;
};