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form-meta - npm Package Compare versions

Comparing version
2.0.2
 to
2.0.3
+978
-3
dist/index.d.mts

@@ -1,4 +0,59 @@

import { StandardSchemaV1 } from "@standard-schema/spec";
import { If, IsAny, IsNever, Merge, OptionalKeysOf, RequiredKeysOf, SetRequired, Simplify } from "type-fest";
//#region ../../node_modules/.pnpm/@standard-schema+spec@1.0.0/node_modules/@standard-schema/spec/dist/index.d.ts
/** The Standard Schema interface. */
interface StandardSchemaV1<Input = unknown, Output = Input> {
/** The Standard Schema properties. */
readonly "~standard": StandardSchemaV1.Props<Input, Output>;
}
declare namespace StandardSchemaV1 {
/** The Standard Schema properties interface. */
export interface Props<Input = unknown, Output = Input> {
/** The version number of the standard. */
readonly version: 1;
/** The vendor name of the schema library. */
readonly vendor: string;
/** Validates unknown input values. */
readonly validate: (value: unknown) => Result<Output> | Promise<Result<Output>>;
/** Inferred types associated with the schema. */
readonly types?: Types<Input, Output> | undefined;
}
/** The result interface of the validate function. */
export type Result<Output> = SuccessResult<Output> | FailureResult;
/** The result interface if validation succeeds. */
export interface SuccessResult<Output> {
/** The typed output value. */
readonly value: Output;
/** The non-existent issues. */
readonly issues?: undefined;
}
/** The result interface if validation fails. */
export interface FailureResult {
/** The issues of failed validation. */
readonly issues: ReadonlyArray<Issue>;
}
/** The issue interface of the failure output. */
export interface Issue {
/** The error message of the issue. */
readonly message: string;
/** The path of the issue, if any. */
readonly path?: ReadonlyArray<PropertyKey | PathSegment> | undefined;
}
/** The path segment interface of the issue. */
export interface PathSegment {
/** The key representing a path segment. */
readonly key: PropertyKey;
}
/** The Standard Schema types interface. */
export interface Types<Input = unknown, Output = Input> {
/** The input type of the schema. */
readonly input: Input;
/** The output type of the schema. */
readonly output: Output;
}
/** Infers the input type of a Standard Schema. */
export type InferInput<Schema extends StandardSchemaV1> = NonNullable<Schema["~standard"]["types"]>["input"];
/** Infers the output type of a Standard Schema. */
export type InferOutput<Schema extends StandardSchemaV1> = NonNullable<Schema["~standard"]["types"]>["output"];
export {};
}
//#endregion
//#region src/types/field/raw.d.ts

@@ -49,2 +104,922 @@ type OptionalKeys<T> = { [K in keyof T]-?: undefined extends T[K] ? K : never }[keyof T];

//#endregion
//#region ../../node_modules/.pnpm/type-fest@5.3.1/node_modules/type-fest/source/union-to-intersection.d.ts
/**
Convert a union type to an intersection type using [distributive conditional types](https://www.typescriptlang.org/docs/handbook/release-notes/typescript-2-8.html#distributive-conditional-types).
Inspired by [this Stack Overflow answer](https://stackoverflow.com/a/50375286/2172153).
@example
```
import type {UnionToIntersection} from 'type-fest';
type Union = {the(): void} | {great(arg: string): void} | {escape: boolean};
type Intersection = UnionToIntersection<Union>;
//=> {the(): void; great(arg: string): void; escape: boolean};
```
@category Type
*/
type UnionToIntersection$1<Union> = (
// `extends unknown` is always going to be the case and is used to convert the
// `Union` into a [distributive conditional
// type](https://www.typescriptlang.org/docs/handbook/release-notes/typescript-2-8.html#distributive-conditional-types).
Union extends unknown
// The union type is used as the only argument to a function since the union
// of function arguments is an intersection.
? (distributedUnion: Union) => void
// This won't happen.
: never
// Infer the `Intersection` type since TypeScript represents the positional
// arguments of unions of functions as an intersection of the union.
) extends ((mergedIntersection: infer Intersection) => void)
// The `& Union` is to ensure result of `UnionToIntersection<A | B>` is always assignable to `A | B`
? Intersection & Union : never;
//#endregion
//#region ../../node_modules/.pnpm/type-fest@5.3.1/node_modules/type-fest/source/keys-of-union.d.ts
/**
Create a union of all keys from a given type, even those exclusive to specific union members.
Unlike the native `keyof` keyword, which returns keys present in **all** union members, this type returns keys from **any** member.
@link https://stackoverflow.com/a/49402091
@example
```
import type {KeysOfUnion} from 'type-fest';
type A = {
common: string;
a: number;
};
type B = {
common: string;
b: string;
};
type C = {
common: string;
c: boolean;
};
type Union = A | B | C;
type CommonKeys = keyof Union;
//=> 'common'
type AllKeys = KeysOfUnion<Union>;
//=> 'common' | 'a' | 'b' | 'c'
```
@category Object
*/
type KeysOfUnion<ObjectType> =
// Hack to fix https://github.com/sindresorhus/type-fest/issues/1008
keyof UnionToIntersection$1<ObjectType extends unknown ? Record<keyof ObjectType, never> : never>;
//#endregion
//#region ../../node_modules/.pnpm/type-fest@5.3.1/node_modules/type-fest/source/is-any.d.ts
/**
Returns a boolean for whether the given type is `any`.
@link https://stackoverflow.com/a/49928360/1490091
Useful in type utilities, such as disallowing `any`s to be passed to a function.
@example
```
import type {IsAny} from 'type-fest';
const typedObject = {a: 1, b: 2} as const;
const anyObject: any = {a: 1, b: 2};
function get<O extends (IsAny<O> extends true ? {} : Record<string, number>), K extends keyof O = keyof O>(object: O, key: K) {
return object[key];
}
const typedA = get(typedObject, 'a');
//=> 1
const anyA = get(anyObject, 'a');
//=> any
```
@category Type Guard
@category Utilities
*/
type IsAny<T> = 0 extends 1 & NoInfer<T> ? true : false;
//#endregion
//#region ../../node_modules/.pnpm/type-fest@5.3.1/node_modules/type-fest/source/is-optional-key-of.d.ts
/**
Returns a boolean for whether the given key is an optional key of type.
This is useful when writing utility types or schema validators that need to differentiate `optional` keys.
@example
```
import type {IsOptionalKeyOf} from 'type-fest';
type User = {
name: string;
surname: string;
luckyNumber?: number;
};
type Admin = {
name: string;
surname?: string;
};
type T1 = IsOptionalKeyOf<User, 'luckyNumber'>;
//=> true
type T2 = IsOptionalKeyOf<User, 'name'>;
//=> false
type T3 = IsOptionalKeyOf<User, 'name' | 'luckyNumber'>;
//=> boolean
type T4 = IsOptionalKeyOf<User | Admin, 'name'>;
//=> false
type T5 = IsOptionalKeyOf<User | Admin, 'surname'>;
//=> boolean
```
@category Type Guard
@category Utilities
*/
type IsOptionalKeyOf<Type extends object, Key$1 extends keyof Type> = IsAny<Type | Key$1> extends true ? never : Key$1 extends keyof Type ? Type extends Record<Key$1, Type[Key$1]> ? false : true : false;
//#endregion
//#region ../../node_modules/.pnpm/type-fest@5.3.1/node_modules/type-fest/source/optional-keys-of.d.ts
/**
Extract all optional keys from the given type.
This is useful when you want to create a new type that contains different type values for the optional keys only.
@example
```
import type {OptionalKeysOf, Except} from 'type-fest';
type User = {
name: string;
surname: string;
luckyNumber?: number;
};
const REMOVE_FIELD = Symbol('remove field symbol');
type UpdateOperation<Entity extends object> = Except<Partial<Entity>, OptionalKeysOf<Entity>> & {
[Key in OptionalKeysOf<Entity>]?: Entity[Key] | typeof REMOVE_FIELD;
};
const update1: UpdateOperation<User> = {
name: 'Alice',
};
const update2: UpdateOperation<User> = {
name: 'Bob',
luckyNumber: REMOVE_FIELD,
};
```
@category Utilities
*/
type OptionalKeysOf<Type extends object> = Type extends unknown // For distributing `Type`
? (keyof { [Key in keyof Type as IsOptionalKeyOf<Type, Key> extends false ? never : Key]: never }) & keyof Type // Intersect with `keyof Type` to ensure result of `OptionalKeysOf<Type>` is always assignable to `keyof Type`
: never;
//#endregion
//#region ../../node_modules/.pnpm/type-fest@5.3.1/node_modules/type-fest/source/required-keys-of.d.ts
/**
Extract all required keys from the given type.
This is useful when you want to create a new type that contains different type values for the required keys only or use the list of keys for validation purposes, etc...
@example
```
import type {RequiredKeysOf} from 'type-fest';
declare function createValidation<
Entity extends object,
Key extends RequiredKeysOf<Entity> = RequiredKeysOf<Entity>,
>(field: Key, validator: (value: Entity[Key]) => boolean): (entity: Entity) => boolean;
type User = {
name: string;
surname: string;
luckyNumber?: number;
};
const validator1 = createValidation<User>('name', value => value.length < 25);
const validator2 = createValidation<User>('surname', value => value.length < 25);
// @ts-expect-error
const validator3 = createValidation<User>('luckyNumber', value => value > 0);
// Error: Argument of type '"luckyNumber"' is not assignable to parameter of type '"name" | "surname"'.
```
@category Utilities
*/
type RequiredKeysOf<Type extends object> = Type extends unknown // For distributing `Type`
? Exclude<keyof Type, OptionalKeysOf<Type>> : never;
//#endregion
//#region ../../node_modules/.pnpm/type-fest@5.3.1/node_modules/type-fest/source/is-never.d.ts
/**
Returns a boolean for whether the given type is `never`.
@link https://github.com/microsoft/TypeScript/issues/31751#issuecomment-498526919
@link https://stackoverflow.com/a/53984913/10292952
@link https://www.zhenghao.io/posts/ts-never
Useful in type utilities, such as checking if something does not occur.
@example
```
import type {IsNever, And} from 'type-fest';
type A = IsNever<never>;
//=> true
type B = IsNever<any>;
//=> false
type C = IsNever<unknown>;
//=> false
type D = IsNever<never[]>;
//=> false
type E = IsNever<object>;
//=> false
type F = IsNever<string>;
//=> false
```
@example
```
import type {IsNever} from 'type-fest';
type IsTrue<T> = T extends true ? true : false;
// When a distributive conditional is instantiated with `never`, the entire conditional results in `never`.
type A = IsTrue<never>;
// ^? type A = never
// If you don't want that behaviour, you can explicitly add an `IsNever` check before the distributive conditional.
type IsTrueFixed<T> =
IsNever<T> extends true ? false : T extends true ? true : false;
type B = IsTrueFixed<never>;
// ^? type B = false
```
@category Type Guard
@category Utilities
*/
type IsNever<T> = [T] extends [never] ? true : false;
//#endregion
//#region ../../node_modules/.pnpm/type-fest@5.3.1/node_modules/type-fest/source/if.d.ts
/**
An if-else-like type that resolves depending on whether the given `boolean` type is `true` or `false`.
Use-cases:
- You can use this in combination with `Is*` types to create an if-else-like experience. For example, `If<IsAny<any>, 'is any', 'not any'>`.
Note:
- Returns a union of if branch and else branch if the given type is `boolean` or `any`. For example, `If<boolean, 'Y', 'N'>` will return `'Y' | 'N'`.
- Returns the else branch if the given type is `never`. For example, `If<never, 'Y', 'N'>` will return `'N'`.
@example
```
import type {If} from 'type-fest';
type A = If<true, 'yes', 'no'>;
//=> 'yes'
type B = If<false, 'yes', 'no'>;
//=> 'no'
type C = If<boolean, 'yes', 'no'>;
//=> 'yes' | 'no'
type D = If<any, 'yes', 'no'>;
//=> 'yes' | 'no'
type E = If<never, 'yes', 'no'>;
//=> 'no'
```
@example
```
import type {If, IsAny, IsNever} from 'type-fest';
type A = If<IsAny<unknown>, 'is any', 'not any'>;
//=> 'not any'
type B = If<IsNever<never>, 'is never', 'not never'>;
//=> 'is never'
```
@example
```
import type {If, IsEqual} from 'type-fest';
type IfEqual<T, U, IfBranch, ElseBranch> = If<IsEqual<T, U>, IfBranch, ElseBranch>;
type A = IfEqual<string, string, 'equal', 'not equal'>;
//=> 'equal'
type B = IfEqual<string, number, 'equal', 'not equal'>;
//=> 'not equal'
```
Note: Sometimes using the `If` type can make an implementation non–tail-recursive, which can impact performance. In such cases, it’s better to use a conditional directly. Refer to the following example:
@example
```
import type {If, IsEqual, StringRepeat} from 'type-fest';
type HundredZeroes = StringRepeat<'0', 100>;
// The following implementation is not tail recursive
type Includes<S extends string, Char extends string> =
S extends `${infer First}${infer Rest}`
? If<IsEqual<First, Char>,
'found',
Includes<Rest, Char>>
: 'not found';
// Hence, instantiations with long strings will fail
// @ts-expect-error
type Fails = Includes<HundredZeroes, '1'>;
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Error: Type instantiation is excessively deep and possibly infinite.
// However, if we use a simple conditional instead of `If`, the implementation becomes tail-recursive
type IncludesWithoutIf<S extends string, Char extends string> =
S extends `${infer First}${infer Rest}`
? IsEqual<First, Char> extends true
? 'found'
: IncludesWithoutIf<Rest, Char>
: 'not found';
// Now, instantiations with long strings will work
type Works = IncludesWithoutIf<HundredZeroes, '1'>;
//=> 'not found'
```
@category Type Guard
@category Utilities
*/
type If<Type extends boolean, IfBranch, ElseBranch> = IsNever<Type> extends true ? ElseBranch : Type extends true ? IfBranch : ElseBranch;
//#endregion
//#region ../../node_modules/.pnpm/type-fest@5.3.1/node_modules/type-fest/source/unknown-array.d.ts
/**
Represents an array with `unknown` value.
Use case: You want a type that all arrays can be assigned to, but you don't care about the value.
@example
```
import type {UnknownArray} from 'type-fest';
type IsArray<T> = T extends UnknownArray ? true : false;
type A = IsArray<['foo']>;
//=> true
type B = IsArray<readonly number[]>;
//=> true
type C = IsArray<string>;
//=> false
```
@category Type
@category Array
*/
type UnknownArray = readonly unknown[];
//#endregion
//#region ../../node_modules/.pnpm/type-fest@5.3.1/node_modules/type-fest/source/internal/array.d.ts
/**
Returns whether the given array `T` is readonly.
*/
type IsArrayReadonly<T extends UnknownArray> = If<IsNever<T>, false, T extends unknown[] ? false : true>;
//#endregion
//#region ../../node_modules/.pnpm/type-fest@5.3.1/node_modules/type-fest/source/simplify.d.ts
/**
Useful to flatten the type output to improve type hints shown in editors. And also to transform an interface into a type to aide with assignability.
@example
```
import type {Simplify} from 'type-fest';
type PositionProps = {
top: number;
left: number;
};
type SizeProps = {
width: number;
height: number;
};
// In your editor, hovering over `Props` will show a flattened object with all the properties.
type Props = Simplify<PositionProps & SizeProps>;
```
Sometimes it is desired to pass a value as a function argument that has a different type. At first inspection it may seem assignable, and then you discover it is not because the `value`'s type definition was defined as an interface. In the following example, `fn` requires an argument of type `Record<string, unknown>`. If the value is defined as a literal, then it is assignable. And if the `value` is defined as type using the `Simplify` utility the value is assignable. But if the `value` is defined as an interface, it is not assignable because the interface is not sealed and elsewhere a non-string property could be added to the interface.
If the type definition must be an interface (perhaps it was defined in a third-party npm package), then the `value` can be defined as `const value: Simplify<SomeInterface> = ...`. Then `value` will be assignable to the `fn` argument. Or the `value` can be cast as `Simplify<SomeInterface>` if you can't re-declare the `value`.
@example
```
import type {Simplify} from 'type-fest';
interface SomeInterface {
foo: number;
bar?: string;
baz: number | undefined;
}
type SomeType = {
foo: number;
bar?: string;
baz: number | undefined;
};
const literal = {foo: 123, bar: 'hello', baz: 456};
const someType: SomeType = literal;
const someInterface: SomeInterface = literal;
declare function fn(object: Record<string, unknown>): void;
fn(literal); // Good: literal object type is sealed
fn(someType); // Good: type is sealed
// @ts-expect-error
fn(someInterface); // Error: Index signature for type 'string' is missing in type 'someInterface'. Because `interface` can be re-opened
fn(someInterface as Simplify<SomeInterface>); // Good: transform an `interface` into a `type`
```
@link https://github.com/microsoft/TypeScript/issues/15300
@see {@link SimplifyDeep}
@category Object
*/
type Simplify<T> = { [KeyType in keyof T]: T[KeyType] } & {};
//#endregion
//#region ../../node_modules/.pnpm/type-fest@5.3.1/node_modules/type-fest/source/is-equal.d.ts
/**
Returns a boolean for whether the two given types are equal.
@link https://github.com/microsoft/TypeScript/issues/27024#issuecomment-421529650
@link https://stackoverflow.com/questions/68961864/how-does-the-equals-work-in-typescript/68963796#68963796
Use-cases:
- If you want to make a conditional branch based on the result of a comparison of two types.
@example
```
import type {IsEqual} from 'type-fest';
// This type returns a boolean for whether the given array includes the given item.
// `IsEqual` is used to compare the given array at position 0 and the given item and then return true if they are equal.
type Includes<Value extends readonly any[], Item> =
Value extends readonly [Value[0], ...infer rest]
? IsEqual<Value[0], Item> extends true
? true
: Includes<rest, Item>
: false;
```
@category Type Guard
@category Utilities
*/
type IsEqual<A, B> = [A] extends [B] ? [B] extends [A] ? _IsEqual<A, B> : false : false;
// This version fails the `equalWrappedTupleIntersectionToBeNeverAndNeverExpanded` test in `test-d/is-equal.ts`.
type _IsEqual<A, B> = (<G>() => G extends A & G | G ? 1 : 2) extends (<G>() => G extends B & G | G ? 1 : 2) ? true : false;
//#endregion
//#region ../../node_modules/.pnpm/type-fest@5.3.1/node_modules/type-fest/source/omit-index-signature.d.ts
/**
Omit any index signatures from the given object type, leaving only explicitly defined properties.
This is the counterpart of `PickIndexSignature`.
Use-cases:
- Remove overly permissive signatures from third-party types.
This type was taken from this [StackOverflow answer](https://stackoverflow.com/a/68261113/420747).
It relies on the fact that an empty object (`{}`) is assignable to an object with just an index signature, like `Record<string, unknown>`, but not to an object with explicitly defined keys, like `Record<'foo' | 'bar', unknown>`.
(The actual value type, `unknown`, is irrelevant and could be any type. Only the key type matters.)
```
const indexed: Record<string, unknown> = {}; // Allowed
// @ts-expect-error
const keyed: Record<'foo', unknown> = {}; // Error
// => TS2739: Type '{}' is missing the following properties from type 'Record<"foo" | "bar", unknown>': foo, bar
```
Instead of causing a type error like the above, you can also use a [conditional type](https://www.typescriptlang.org/docs/handbook/2/conditional-types.html) to test whether a type is assignable to another:
```
type Indexed = {} extends Record<string, unknown>
? '✅ `{}` is assignable to `Record<string, unknown>`'
: '❌ `{}` is NOT assignable to `Record<string, unknown>`';
// => '✅ `{}` is assignable to `Record<string, unknown>`'
type Keyed = {} extends Record<'foo' | 'bar', unknown>
? '✅ `{}` is assignable to `Record<\'foo\' | \'bar\', unknown>`'
: '❌ `{}` is NOT assignable to `Record<\'foo\' | \'bar\', unknown>`';
// => "❌ `{}` is NOT assignable to `Record<'foo' | 'bar', unknown>`"
```
Using a [mapped type](https://www.typescriptlang.org/docs/handbook/2/mapped-types.html#further-exploration), you can then check for each `KeyType` of `ObjectType`...
```
type OmitIndexSignature<ObjectType> = {
[KeyType in keyof ObjectType // Map each key of `ObjectType`...
]: ObjectType[KeyType]; // ...to its original value, i.e. `OmitIndexSignature<Foo> == Foo`.
};
```
...whether an empty object (`{}`) would be assignable to an object with that `KeyType` (`Record<KeyType, unknown>`)...
```
type OmitIndexSignature<ObjectType> = {
[KeyType in keyof ObjectType
// Is `{}` assignable to `Record<KeyType, unknown>`?
as {} extends Record<KeyType, unknown>
? never // ✅ `{}` is assignable to `Record<KeyType, unknown>`
: KeyType // ❌ `{}` is NOT assignable to `Record<KeyType, unknown>`
]: ObjectType[KeyType];
};
```
If `{}` is assignable, it means that `KeyType` is an index signature and we want to remove it. If it is not assignable, `KeyType` is a "real" key and we want to keep it.
@example
```
import type {OmitIndexSignature} from 'type-fest';
type Example = {
// These index signatures will be removed.
[x: string]: any;
[x: number]: any;
[x: symbol]: any;
[x: `head-${string}`]: string;
[x: `${string}-tail`]: string;
[x: `head-${string}-tail`]: string;
[x: `${bigint}`]: string;
[x: `embedded-${number}`]: string;
// These explicitly defined keys will remain.
foo: 'bar';
qux?: 'baz';
};
type ExampleWithoutIndexSignatures = OmitIndexSignature<Example>;
// => { foo: 'bar'; qux?: 'baz' | undefined; }
```
@see {@link PickIndexSignature}
@category Object
*/
type OmitIndexSignature<ObjectType> = { [KeyType in keyof ObjectType as {} extends Record<KeyType, unknown> ? never : KeyType]: ObjectType[KeyType] };
//#endregion
//#region ../../node_modules/.pnpm/type-fest@5.3.1/node_modules/type-fest/source/pick-index-signature.d.ts
/**
Pick only index signatures from the given object type, leaving out all explicitly defined properties.
This is the counterpart of `OmitIndexSignature`.
@example
```
import type {PickIndexSignature} from 'type-fest';
declare const symbolKey: unique symbol;
type Example = {
// These index signatures will remain.
[x: string]: unknown;
[x: number]: unknown;
[x: symbol]: unknown;
[x: `head-${string}`]: string;
[x: `${string}-tail`]: string;
[x: `head-${string}-tail`]: string;
[x: `${bigint}`]: string;
[x: `embedded-${number}`]: string;
// These explicitly defined keys will be removed.
['kebab-case-key']: string;
[symbolKey]: string;
foo: 'bar';
qux?: 'baz';
};
type ExampleIndexSignature = PickIndexSignature<Example>;
// {
// [x: string]: unknown;
// [x: number]: unknown;
// [x: symbol]: unknown;
// [x: `head-${string}`]: string;
// [x: `${string}-tail`]: string;
// [x: `head-${string}-tail`]: string;
// [x: `${bigint}`]: string;
// [x: `embedded-${number}`]: string;
// }
```
@see {@link OmitIndexSignature}
@category Object
*/
type PickIndexSignature<ObjectType> = { [KeyType in keyof ObjectType as {} extends Record<KeyType, unknown> ? KeyType : never]: ObjectType[KeyType] };
//#endregion
//#region ../../node_modules/.pnpm/type-fest@5.3.1/node_modules/type-fest/source/merge.d.ts
// Merges two objects without worrying about index signatures.
type SimpleMerge<Destination, Source> = { [Key in keyof Destination as Key extends keyof Source ? never : Key]: Destination[Key] } & Source;
/**
Merge two types into a new type. Keys of the second type overrides keys of the first type.
@example
```
import type {Merge} from 'type-fest';
type Foo = {
[x: string]: unknown;
[x: number]: unknown;
foo: string;
bar: symbol;
};
type Bar = {
[x: number]: number;
[x: symbol]: unknown;
bar: Date;
baz: boolean;
};
export type FooBar = Merge<Foo, Bar>;
// => {
// [x: string]: unknown;
// [x: number]: number;
// [x: symbol]: unknown;
// foo: string;
// bar: Date;
// baz: boolean;
// }
```
@category Object
*/
type Merge<Destination, Source> = Simplify<SimpleMerge<PickIndexSignature<Destination>, PickIndexSignature<Source>> & SimpleMerge<OmitIndexSignature<Destination>, OmitIndexSignature<Source>>>;
//#endregion
//#region ../../node_modules/.pnpm/type-fest@5.3.1/node_modules/type-fest/source/internal/object.d.ts
/**
Works similar to the built-in `Pick` utility type, except for the following differences:
- Distributes over union types and allows picking keys from any member of the union type.
- Primitives types are returned as-is.
- Picks all keys if `Keys` is `any`.
- Doesn't pick `number` from a `string` index signature.
@example
```
type ImageUpload = {
url: string;
size: number;
thumbnailUrl: string;
};
type VideoUpload = {
url: string;
duration: number;
encodingFormat: string;
};
// Distributes over union types and allows picking keys from any member of the union type
type MediaDisplay = HomomorphicPick<ImageUpload | VideoUpload, "url" | "size" | "duration">;
//=> {url: string; size: number} | {url: string; duration: number}
// Primitive types are returned as-is
type Primitive = HomomorphicPick<string | number, 'toUpperCase' | 'toString'>;
//=> string | number
// Picks all keys if `Keys` is `any`
type Any = HomomorphicPick<{a: 1; b: 2} | {c: 3}, any>;
//=> {a: 1; b: 2} | {c: 3}
// Doesn't pick `number` from a `string` index signature
type IndexSignature = HomomorphicPick<{[k: string]: unknown}, number>;
//=> {}
*/
type HomomorphicPick<T, Keys extends KeysOfUnion<T>> = { [P in keyof T as Extract<P, Keys>]: T[P] };
/**
Merges user specified options with default options.
@example
```
type PathsOptions = {maxRecursionDepth?: number; leavesOnly?: boolean};
type DefaultPathsOptions = {maxRecursionDepth: 10; leavesOnly: false};
type SpecifiedOptions = {leavesOnly: true};
type Result = ApplyDefaultOptions<PathsOptions, DefaultPathsOptions, SpecifiedOptions>;
//=> {maxRecursionDepth: 10; leavesOnly: true}
```
@example
```
// Complains if default values are not provided for optional options
type PathsOptions = {maxRecursionDepth?: number; leavesOnly?: boolean};
type DefaultPathsOptions = {maxRecursionDepth: 10};
type SpecifiedOptions = {};
type Result = ApplyDefaultOptions<PathsOptions, DefaultPathsOptions, SpecifiedOptions>;
// ~~~~~~~~~~~~~~~~~~~
// Property 'leavesOnly' is missing in type 'DefaultPathsOptions' but required in type '{ maxRecursionDepth: number; leavesOnly: boolean; }'.
```
@example
```
// Complains if an option's default type does not conform to the expected type
type PathsOptions = {maxRecursionDepth?: number; leavesOnly?: boolean};
type DefaultPathsOptions = {maxRecursionDepth: 10; leavesOnly: 'no'};
type SpecifiedOptions = {};
type Result = ApplyDefaultOptions<PathsOptions, DefaultPathsOptions, SpecifiedOptions>;
// ~~~~~~~~~~~~~~~~~~~
// Types of property 'leavesOnly' are incompatible. Type 'string' is not assignable to type 'boolean'.
```
@example
```
// Complains if an option's specified type does not conform to the expected type
type PathsOptions = {maxRecursionDepth?: number; leavesOnly?: boolean};
type DefaultPathsOptions = {maxRecursionDepth: 10; leavesOnly: false};
type SpecifiedOptions = {leavesOnly: 'yes'};
type Result = ApplyDefaultOptions<PathsOptions, DefaultPathsOptions, SpecifiedOptions>;
// ~~~~~~~~~~~~~~~~
// Types of property 'leavesOnly' are incompatible. Type 'string' is not assignable to type 'boolean'.
```
*/
type ApplyDefaultOptions$1<Options extends object, Defaults extends Simplify<Omit<Required<Options>, RequiredKeysOf<Options>> & Partial<Record<RequiredKeysOf<Options>, never>>>, SpecifiedOptions extends Options> = If<IsAny<SpecifiedOptions>, Defaults, If<IsNever<SpecifiedOptions>, Defaults, Simplify<Merge<Defaults, { [Key in keyof SpecifiedOptions as Key extends OptionalKeysOf<Options> ? undefined extends SpecifiedOptions[Key] ? never : Key : Key]: SpecifiedOptions[Key] }> & Required<Options>>>>;
//#endregion
//#region ../../node_modules/.pnpm/type-fest@5.3.1/node_modules/type-fest/source/except.d.ts
/**
Filter out keys from an object.
Returns `never` if `Exclude` is strictly equal to `Key`.
Returns `never` if `Key` extends `Exclude`.
Returns `Key` otherwise.
@example
```
type Filtered = Filter<'foo', 'foo'>;
//=> never
```
@example
```
type Filtered = Filter<'bar', string>;
//=> never
```
@example
```
type Filtered = Filter<'bar', 'foo'>;
//=> 'bar'
```
@see {Except}
*/
type Filter<KeyType$1, ExcludeType> = IsEqual<KeyType$1, ExcludeType> extends true ? never : (KeyType$1 extends ExcludeType ? never : KeyType$1);
type ExceptOptions = {
/**
Disallow assigning non-specified properties.
Note that any omitted properties in the resulting type will be present in autocomplete as `undefined`.
@default false
*/
requireExactProps?: boolean;
};
type DefaultExceptOptions = {
requireExactProps: false;
};
/**
Create a type from an object type without certain keys.
We recommend setting the `requireExactProps` option to `true`.
This type is a stricter version of [`Omit`](https://www.typescriptlang.org/docs/handbook/release-notes/typescript-3-5.html#the-omit-helper-type). The `Omit` type does not restrict the omitted keys to be keys present on the given type, while `Except` does. The benefits of a stricter type are avoiding typos and allowing the compiler to pick up on rename refactors automatically.
This type was proposed to the TypeScript team, which declined it, saying they prefer that libraries implement stricter versions of the built-in types ([microsoft/TypeScript#30825](https://github.com/microsoft/TypeScript/issues/30825#issuecomment-523668235)).
@example
```
import type {Except} from 'type-fest';
type Foo = {
a: number;
b: string;
};
type FooWithoutA = Except<Foo, 'a'>;
//=> {b: string}
// @ts-expect-error
const fooWithoutA: FooWithoutA = {a: 1, b: '2'};
//=> errors: 'a' does not exist in type '{ b: string; }'
type FooWithoutB = Except<Foo, 'b', {requireExactProps: true}>;
//=> {a: number} & Partial<Record<"b", never>>
// @ts-expect-error
const fooWithoutB: FooWithoutB = {a: 1, b: '2'};
//=> errors at 'b': Type 'string' is not assignable to type 'undefined'.
// The `Omit` utility type doesn't work when omitting specific keys from objects containing index signatures.
// Consider the following example:
type UserData = {
[metadata: string]: string;
email: string;
name: string;
role: 'admin' | 'user';
};
// `Omit` clearly doesn't behave as expected in this case:
type PostPayload = Omit<UserData, 'email'>;
//=> { [x: string]: string; [x: number]: string; }
// In situations like this, `Except` works better.
// It simply removes the `email` key while preserving all the other keys.
type PostPayloadFixed = Except<UserData, 'email'>;
//=> { [x: string]: string; name: string; role: 'admin' | 'user'; }
```
@category Object
*/
type Except<ObjectType, KeysType extends keyof ObjectType, Options extends ExceptOptions = {}> = _Except<ObjectType, KeysType, ApplyDefaultOptions$1<ExceptOptions, DefaultExceptOptions, Options>>;
type _Except<ObjectType, KeysType extends keyof ObjectType, Options extends Required<ExceptOptions>> = { [KeyType in keyof ObjectType as Filter<KeyType, KeysType>]: ObjectType[KeyType] } & (Options['requireExactProps'] extends true ? Partial<Record<KeysType, never>> : {});
//#endregion
//#region ../../node_modules/.pnpm/type-fest@5.3.1/node_modules/type-fest/source/set-required.d.ts
/**
Create a type that makes the given keys required. The remaining keys are kept as is. The sister of the `SetOptional` type.
Use-case: You want to define a single model where the only thing that changes is whether or not some of the keys are required.
@example
```
import type {SetRequired} from 'type-fest';
type Foo = {
a?: number;
b: string;
c?: boolean;
};
type SomeRequired = SetRequired<Foo, 'b' | 'c'>;
// type SomeRequired = {
// a?: number;
// b: string; // Was already required and still is.
// c: boolean; // Is now required.
// }
// Set specific indices in an array to be required.
type ArrayExample = SetRequired<[number?, number?, number?], 0 | 1>;
//=> [number, number, number?]
```
@category Object
*/
type SetRequired<BaseType, Keys extends keyof BaseType> = (BaseType extends ((...arguments_: never) => any) ? (...arguments_: Parameters<BaseType>) => ReturnType<BaseType> : unknown) & _SetRequired<BaseType, Keys>;
type _SetRequired<BaseType, Keys extends keyof BaseType> = BaseType extends UnknownArray ? SetArrayRequired<BaseType, Keys> extends infer ResultantArray ? If<IsArrayReadonly<BaseType>, Readonly<ResultantArray>, ResultantArray> : never : Simplify<
// Pick just the keys that are optional from the base type.
Except<BaseType, Keys> &
// Pick the keys that should be required from the base type and make them required.
Required<HomomorphicPick<BaseType, Keys>>>;
/**
Remove the optional modifier from the specified keys in an array.
*/
type SetArrayRequired<TArray extends UnknownArray, Keys, Counter extends any[] = [], Accumulator extends UnknownArray = []> = TArray extends unknown // For distributing `TArray` when it's a union
? keyof TArray & `${number}` extends never
// Exit if `TArray` is empty (e.g., []), or
// `TArray` contains no non-rest elements preceding the rest element (e.g., `[...string[]]` or `[...string[], string]`).
? [...Accumulator, ...TArray] : TArray extends readonly [(infer First)?, ...infer Rest] ? '0' extends OptionalKeysOf<TArray> // If the first element of `TArray` is optional
? `${Counter['length']}` extends `${Keys & (string | number)}` // If the current index needs to be required
? SetArrayRequired<Rest, Keys, [...Counter, any], [...Accumulator, First]>
// If the current element is optional, but it doesn't need to be required,
// then we can exit early, since no further elements can now be made required.
: [...Accumulator, ...TArray] : SetArrayRequired<Rest, Keys, [...Counter, any], [...Accumulator, TArray[0]]> : never // Should never happen, since `[(infer F)?, ...infer R]` is a top-type for arrays.
: never; // Should never happen
//#endregion
//#region src/types/helper.d.ts

@@ -51,0 +1026,0 @@ /**

+2
-6
package.json
{
"name": "form-meta",
"type": "module",
"version": "2.0.2",
"version": "2.0.3",
"description": "Type-safe form field meta resolver with flatten/purge for nested schemas",

@@ -30,9 +30,5 @@ "author": "Byron <byronogis@outlook.com>",

],
"dependencies": {
"devDependencies": {
"@standard-schema/spec": "^1.0.0",
"es-toolkit": "^1.42.0",
"type-fest": "^5.3.1",
"zod": "^4.1.13"
},
"devDependencies": {
"typescript": "^5.9.3"

@@ -39,0 +35,0 @@ },