denoland-deno/ext/webstorage/lib.deno_webstorage.d.ts

// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.

// deno-lint-ignore-file no-explicit-any no-var

/// <reference no-default-lib="true" />
/// <reference lib="esnext" />

/** This Web Storage API interface provides access to a particular domain's
 * session or local storage. It allows, for example, the addition, modification,
 * or deletion of stored data items.
 *
 * @category Storage
 */
interface Storage {
  /**
   * Returns the number of key/value pairs currently present in the list associated with the object.
   */
  readonly length: number;
  /**
   * Empties the list associated with the object of all key/value pairs, if there are any.
   */
  clear(): void;
  /**
   * Returns the current value associated with the given key, or null if the given key does not exist in the list associated with the object.
   */
  getItem(key: string): string | null;
  /**
   * Returns the name of the nth key in the list, or null if n is greater than or equal to the number of key/value pairs in the object.
   */
  key(index: number): string | null;
  /**
   * Removes the key/value pair with the given key from the list associated with the object, if a key/value pair with the given key exists.
   */
  removeItem(key: string): void;
  /**
   * Sets the value of the pair identified by key to value, creating a new key/value pair if none existed for key previously.
   *
   * Throws a "QuotaExceededError" DOMException exception if the new value couldn't be set. (Setting could fail if, e.g., the user has disabled storage for the site, or if the quota has been exceeded.)
   */
  setItem(key: string, value: string): void;
  [name: string]: any;
}

/** @category Storage */
declare var Storage: {
  readonly prototype: Storage;
  new (): never;
};