function applyExternalAPI_Polyfill() {
        // @ts-expect-error API above
        window.externalAPI = {
            ___WEB_SCROBBLER_EVENTS: {},

            // on PLAY/OFF, on changing timer offset
            EVENT_STATE: YandexMusicEvents.EVENT_STATE,

            // on changing track
            EVENT_TRACK: YandexMusicEvents.EVENT_TRACK,

            on(event: YandexMusicEvents, listener: () => void) {

            },
            off(event: YandexMusicEvents, listener: () => void) {

            },
            isPlaying: () => document.querySelector('[*|href="#pause_filled"]') instanceof SVGUseElement,
            getCurrentTrack() {
                const duration = getTimecodeRoot()?.querySelector('input')?.value;

                const cover = (document.querySelector("img[class*='PlayerBarDesktop_cover']")! as HTMLImageElement).src;

                return {
                    title: "",
                    album: { title: "" },
                    cover,
                    artists: [{ title: "" }],
                    duration: 26000,
                    link: "",
                }
            },
            getProgress: () => ({ position: Number(getInputRoot()?.value) * 1000 })
        } satisfies Window["externalAPI"];

        isPolyfilled = true;
        console.log("yandex-music scrobbler: polyfilling successfull!")
    }