type-fest/source/pascal-cased-properties.d.ts

A collection of essential TypeScript types

import type {CamelCaseOptions, DefaultCamelCaseOptions} from './camel-case.d.ts';
import type {ApplyDefaultOptions} from './internal/index.d.ts';
import type {PascalCase} from './pascal-case.d.ts';

/**
Convert object properties to pascal case but not recursively.

This can be useful when, for example, converting some API types from a different style.

@see PascalCase
@see PascalCasedPropertiesDeep

@example
```
import type {PascalCasedProperties} from 'type-fest';

interface User {
	userId: number;
	userName: string;
}

const result: PascalCasedProperties<User> = {
	UserId: 1,
	UserName: 'Tom',
};

const preserveConsecutiveUppercase: PascalCasedProperties<{fooBAR: string}, {preserveConsecutiveUppercase: true}> = {
	FooBAR: 'string',
};
```

@category Change case
@category Template literal
@category Object
*/
export type PascalCasedProperties<Value, Options extends CamelCaseOptions = {}> = Value extends Function
	? Value
	: Value extends Array<infer U>
		? Value
		: {[K in keyof Value as PascalCase<K, ApplyDefaultOptions<CamelCaseOptions, DefaultCamelCaseOptions, Options>>]: Value[K]};