// ==UserScript==
// @name            Shinymas Audio Keeper
// @namespace       https://greasyfork.org/ja/users/1492018-sino87
// @version         1.0
// @description     Keep ShinyColors BGM playing in background
// @match           https://shinycolors.enza.fun/*
// @run-at          document-start
// @license         MIT
// @icon            http://www.google.com/s2/favicons?domain=https://shinycolors.idolmaster.jp/
// @downloadURL https://update.greasyfork.icu/scripts/546521/Shinymas%20Audio%20Keeper.user.js
// @updateURL https://update.greasyfork.icu/scripts/546521/Shinymas%20Audio%20Keeper.meta.js
// ==/UserScript==

(function() {
  'use strict';

  window.addEventListener('blur', ev => ev.stopImmediatePropagation(), { capture: true });
  document.addEventListener('visibilitychange', ev => ev.stopImmediatePropagation(), { capture: true });
})();