@cedx/webstorage/lib/Storage.d.ts

Service for interacting with the Web Storage.

import { StorageEvent } from "./StorageEvent.js";
/**
 * Provides access to the [Web Storage](https://developer.mozilla.org/docs/Web/API/Web_Storage_API).
 */
export declare class Storage extends EventTarget implements Disposable, Iterable<[string, any], void, void> {
    #private;
    /**
     * The `change` event type.
     */
    static readonly changeEvent = "webstorage:change";
    /**
     * Creates a new storage service.
     * @param backend The underlying data store.
     * @param options An object providing values to initialize this instance.
     */
    private constructor();
    /**
     * The keys of this storage.
     */
    get keys(): Set<string>;
    /**
     * The number of entries in this storage.
     */
    get length(): number;
    /**
     * Creates a new local storage service.
     * @param options An object providing values to initialize the service.
     * @returns The newly created service.
     */
    static local(options?: StorageOptions): Storage;
    /**
     * Creates a new session storage service.
     * @param options An object providing values to initialize the service.
     * @returns The newly created service.
     */
    static session(options?: StorageOptions): Storage;
    /**
     * Releases any resources associated with this object.
     */
    [Symbol.dispose](): void;
    /**
     * Returns a new iterator that allows iterating the entries of this storage.
     * @returns An iterator for the entries of this storage.
     */
    [Symbol.iterator](): Iterator<[string, any], void, void>;
    /**
     * Removes all entries from this storage.
     */
    clear(): void;
    /**
     * Removes the value associated with the specified key.
     * @param key The storage key.
     * @returns The value associated with the key before it was removed.
     */
    delete<T>(key: string): T | null;
    /**
     * Cancels the subscription to the global storage events.
     */
    dispose(): void;
    /**
     * Gets the deserialized value associated with the specified key.
     * @param key The storage key.
     * @returns The storage value, or `null` if the key does not exist or the value cannot be deserialized.
     */
    get<T>(key: string): T | null;
    /**
     * Gets a value indicating whether this storage contains the specified key.
     * @param key The storage key.
     * @returns `true` if this storage contains the specified key, otherwise `false`.
     */
    has(key: string): boolean;
    /**
     * Registers a function that will be invoked whenever the `change` event is triggered.
     * @param listener The event handler to register.
     * @returns This instance.
     */
    onChange(listener: (event: StorageEvent) => void): this;
    /**
     * Serializes and associates a given `value` with the specified `key`.
     * @param key The storage key.
     * @param value The storage value.
     * @returns This instance.
     */
    set(key: string, value: unknown): this;
    /**
     * Returns a JSON representation of this object.
     * @returns The JSON representation of this object.
     */
    toJSON(): Array<[string, any]>;
}
/**
 * Defines the options of a {@link Storage} instance.
 */
export type StorageOptions = Partial<{
    /**
     * A string prefixed to every key so that it is unique globally in the whole storage.
     */
    keyPrefix: string;
    /**
     * Value indicating whether to listen to the global storage events.
     */
    listenToGlobalEvents: boolean;
}>;
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