@manuth/interceptor/lib/ExistenceChecker.d.ts

Provides a convenient way to intercept method- property- and accessor-calls of an object.

/**
 * Provides the functionality to check whether a key exists in an object.
 *
 * @template T
 * The type of the target of the interception.
 *
 * @template TKey
 * The key of the intercepted member.
 */
export type ExistenceChecker<T, TKey> = 
/**
 * Checks whether the specified {@linkcode key} exists.
 *
 * @param target
 * The target this interception belongs to.
 *
 * @param key
 * The key of the property.
 *
 * @returns
 * A value indicating whether the specified {@linkcode key} exists in the {@linkcode target}.
 */
(target: T, key: TKey) => boolean;