通過獲取騰訊視頻的vid

在頁面內通過iframe嵌入視頻

<iframe id="my-videos" frameborder="0" width="960px" height="400px" src="https://v.qq.com/txp/iframe/player.html?vid=q00273zq6vy" allowFullScreen="true"></iframe>

想獲取觀看時長，但是這種嵌入的視頻，獲取不到騰訊視頻的播放時長

因為跨域了

查了各種方法發現騰訊沒有提供接口的話就無法獲取

只能通過用戶進入網頁的時間和離開網頁的時間之差來獲取

$(document).ready(function
 
() {
  let startTime = new Date(),
    duration = 0;
  document.addEventListener(
    "visibilitychange",
    function() {
      if (document.visibilityState == "hidden") {
        let endTime = new Date();
        duration = endTime.getTime() - startTime.getTime();
      } else {
        startTime = new
 
 Date();
      }
    },
    false
  );
  $(window).bind("beforeunload", function() {
    let endTime = new Date();
    t = endTime.getTime() - startTime.getTime() + duration;
    let hour = Math.floor((t / 1000 / 60 / 60) % 24);
    let min = Math.floor((t / 1000 / 60) % 60);
    let sec = Math.floor((t / 1000) % 60);
    studytime 
 
= hour + "小時" + min + "分鐘" + sec + "秒";
    let studydate = format(startTime, "yyyy-MM-dd HH:mm:ss");
    console.log(studytime, studydate);
    return "您輸入的內容尚未保存，確定離開此頁面嗎？";
  });
});

源代碼：https://github.com/ouxiaojie18/-/tree/master/%E5%B5%8C%E5%85%A5%E8%85%BE%E8%AE%AF%E8%A7%86%E9%A2%91

嵌入視頻，計算觀看時長