@antoniojps/youtubei.js/dist/src/utils/EventEmitterLike.js

A JavaScript client for YouTube's private API, known as InnerTube.

import { Platform } from './Utils.js';
export default class EventEmitterLike extends EventTarget {
    #legacy_listeners = new Map();
    constructor() {
        super();
    }
    emit(type, ...args) {
        const event = new Platform.shim.CustomEvent(type, { detail: args });
        this.dispatchEvent(event);
    }
    on(type, listener) {
        const wrapper = (ev) => {
            if (ev instanceof Platform.shim.CustomEvent) {
                listener(...ev.detail);
            }
            else {
                listener(ev);
            }
        };
        this.#legacy_listeners.set(listener, wrapper);
        this.addEventListener(type, wrapper);
    }
    once(type, listener) {
        const wrapper = (ev) => {
            if (ev instanceof Platform.shim.CustomEvent) {
                listener(...ev.detail);
            }
            else {
                listener(ev);
            }
            this.off(type, listener);
        };
        this.#legacy_listeners.set(listener, wrapper);
        this.addEventListener(type, wrapper);
    }
    off(type, listener) {
        const wrapper = this.#legacy_listeners.get(listener);
        if (wrapper) {
            this.removeEventListener(type, wrapper);
            this.#legacy_listeners.delete(listener);
        }
    }
}
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