@johngw/stream/dist/storages/MemoryStorage.js

Reactive programming tools using the WHATWG Streams API.

/**
 * An in-memory storage class.
 *
 * @group Storages
 */
export class MemoryStorage {
    #data = {};
    get length() {
        return Object.keys(this.#data).length;
    }
    clear() {
        this.#data = {};
    }
    getItem(key) {
        return (key in this.#data && this.#data[key]) || null;
    }
    key(index) {
        return Object.keys(this.#data)[index] ?? null;
    }
    removeItem(key) {
        delete this.#data[key];
    }
    setItem(key, value) {
        this.#data[key] = value;
    }
}
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