Spotify Miniplayer Unlocker

Removes the Premium resize popup in Spotify's miniplayers.
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// ==UserScript==
// @name         Spotify Miniplayer Unlocker
// @namespace    https://open.spotify.com/
// @version      1.0.1
// @description  Removes the Premium resize popup in Spotify's miniplayers.
// @author       shmo
// @license      MIT
// @match        https://open.spotify.com/*
// @grant        unsafeWindow
// @run-at       document-start
// ==/UserScript==

(function () {
    'use strict';

    function killPopup(doc) {
        var popup = doc.querySelector('.gDrPbJQiN4Ij2XGL');
        if (!popup) return;
        popup.style.setProperty('display', 'none', 'important');
        var notNow = popup.querySelector('.kaOb9iL_4FaiiHH9');
        if (!notNow) {
            var all = popup.querySelectorAll('[data-encore-id="buttonTertiary"]');
            notNow = all[all.length - 1] || null;
        }
        if (notNow) notNow.click();
    }

    function setupInPiP(doc, pipWin) {

        if (!doc.getElementById('smu-suppress')) {
            try {
                var s = doc.createElement('style');
                s.id = 'smu-suppress';
                s.textContent = '.gDrPbJQiN4Ij2XGL { display: none !important; }';
                (doc.head || doc.documentElement).appendChild(s);
            } catch (e) { /* mario kart */ }
        }

        if (!doc._smuObserver) {
            var root = doc.querySelector('.encore-dark-theme') || doc.documentElement;
            doc._smuObserver = new MutationObserver(function () {
                killPopup(doc);
            });
            doc._smuObserver.observe(root, {
                attributes:      true,
                attributeFilter: ['style'],
                childList:       true,
                subtree:         true,
            });
            killPopup(doc);
        }
    }

    function injectIntoPiP(pipWin) {
        if (pipWin._smuInjected) return;
        pipWin._smuInjected = true;
        var doc = pipWin.document;
        setupInPiP(doc, pipWin);
        pipWin.addEventListener('load', function () {
            setupInPiP(pipWin.document, pipWin);
        });
        setTimeout(function () { setupInPiP(pipWin.document, pipWin); }, 500);
        setTimeout(function () { setupInPiP(pipWin.document, pipWin); }, 1500);
    }

    function hookPiP() {
        var pip;
        try { pip = unsafeWindow.documentPictureInPicture; } catch (e) {}

        if (!pip) {
            setTimeout(hookPiP, 400);
            return;
        }
        if (pip.__smu__) return;
        pip.__smu__ = true;

        var orig = pip.requestWindow.bind(pip);
        pip.requestWindow = function (opts) {
            return orig(opts).then(function (pipWin) {
                injectIntoPiP(pipWin);
                return pipWin;
            });
        };
        if (pip.window) injectIntoPiP(pip.window);
    }
    function pollForPiP() {
        try {
            var pip = unsafeWindow.documentPictureInPicture;
            if (pip && pip.window && !pip.window._smuInjected) {
                injectIntoPiP(pip.window);
            }
        } catch (e) {}
    }

    hookPiP();
    setInterval(pollForPiP, 1000);

})();