@naturalcycles/js-lib/dist/object/map2.js

Standard library for universal (browser + Node.js) javascript

/**
 * Like Map, but serializes to JSON as an object.
 *
 * Fixes the "issue" of stock Map being json-serialized as `{}`.
 *
 * @experimental
 */
export class Map2 extends Map {
    /**
     * Convenience way to create Map2 from object.
     */
    static of(obj) {
        return new Map2(Object.entries(obj));
    }
    /**
     * Allows to set multiple key-value pairs at once.
     */
    setMany(obj) {
        for (const [k, v] of Object.entries(obj)) {
            this.set(k, v);
        }
        return this;
    }
    toObject() {
        return Object.fromEntries(this);
    }
    toJSON() {
        return Object.fromEntries(this);
    }
    toString() {
        return `Map2(${this.size}) ${JSON.stringify(Object.fromEntries(this))}`;
    }
}