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Change Facebook Notification Sound

Small script for a request https://greasyfork.org/uk/forum/discussion/6631/change-facebook-notification-sound-convert-chrome-extension-to-userscript

当前为 2015-10-25 提交的版本，查看 最新版本。

  1. // ==UserScript==
  2. // @name        Change Facebook Notification Sound
  3. // @namespace   cfs
  4. // @description Small script for a request https://greasyfork.org/uk/forum/discussion/6631/change-facebook-notification-sound-convert-chrome-extension-to-userscript
  5. // @include     https://facebook.com/*
  6. // @include     https://www.facebook.com/*
  7. // @version     0.1.3
  8. // @grant       none
  9. // @noframes
  10. // @run-at document-end
  11. // @author      Dexmaster
  12. // @date        2015-10-25
  13. // ==/UserScript==
  14.  
  15. (function () {
  16.     "use strict";
  17.  
  18.     var counter = 0,
  19.         soundUri = 'https://instaud.io/_/djS.mp3', // input sound link here
  20.         interval = 5, // number of seconds between checks
  21.         audio;
  22.  
  23.     var ready = function (fn) {
  24.         if (document.readyState !== 'loading') {
  25.             fn();
  26.         } else {
  27.             document.addEventListener('DOMContentLoaded', fn);
  28.         }
  29.     };
  30.  
  31.     var countUnread = function () {
  32.         var els = document.querySelectorAll("._51jx"),
  33.             sum = Array.prototype.map.call(els, function (el) {
  34.                 return parseInt(el.innerHTML) || 0;
  35.             }).reduce(function (a, b) {
  36.                 return a + b;
  37.             }, 0);
  38.         return sum;
  39.     };
  40.  
  41.     var numberChange = function () {
  42.         var num = countUnread();
  43.         if (counter !== num) {
  44.             counter = num;
  45.             audio.play();
  46.         }
  47.     };
  48.  
  49.     var init = function () {
  50.         audio = document.createElement('audio');
  51.         audio.setAttribute('src', soundUri);
  52.         // audio.setAttribute('autoplay', 'autoplay');
  53.         setInterval(numberChange, interval*1000);
  54.     };
  55.  
  56.     ready(init);
  57.  
  58. }());