typedash/dist/index-BkmHcA0I.d.cts

modern, type-safe collection of utility functions

import { K as KeysOfUnion } from './KeysOfUnion-BrkZWXzm.cjs';

/**
 * A utility type around `string` that allows for autocomplete on the string on a specific set of values, yet accepting any string.
 * @see https://twitter.com/diegohaz/status/1524257274012876801
 */
type StringWithAutocomplete<S extends string> = S | (string & Record<never, never>);

/**
 * Returns whether the input value has the specified key.
 * @param value The value to check.
 * @param key The key to check for.
 * @returns Whether the input value has the specified key.
 * @example
 * ```ts
 * hasKey({ a: 1 }, 'a') // true
 * hasKey({ a: 1 }, 'b') // false
 * ```
 */
declare function hasKey<T extends object, K extends StringWithAutocomplete<KeysOfUnion<T> & string> | PropertyKey>(value: T, key: K): value is T & Record<K, unknown>;

export { type StringWithAutocomplete as S, hasKey as h };