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Youtube Live Clock

Show present time of the livestream!

当前为 2022-10-25 提交的版本，查看 最新版本。

  1. // ==UserScript==
  2. // @name         Youtube Live Clock
  3. // @namespace    https://greasyfork.org/scripts/453367
  4. // @version      1.4.0
  5. // @description  Show present time of the livestream!
  6. // @author       Derek
  7. // @match        *://www.youtube.com/*
  8. // @grant        none
  9. // @noframes
  10. // ==/UserScript==
  11.  
  12. let twoDigit = (num) => {
  13.   if (String(num).length === 2) return num
  14.   else return '0' + String(num)
  15. }
  16. let formatTime = (time) => {
  17.   let second = time % 60
  18.   let minute = (time - second) % 3600 / 60
  19.   let hour = (time - minute * 60 - second) / 3600
  20.  
  21.   if (time < 3600) return `${minute}:${twoDigit(second)}  `
  22.   else return `${hour}:${twoDigit(minute)}:${twoDigit(second)}  `
  23. }
  24. let getClock = () => {
  25.   let liveClock = document.querySelector('.present-time')
  26.   if (!liveClock) {
  27.       let timeDisplay = document.querySelectorAll('.ytp-time-display')
  28.       let clockElement = document.createElement('span')
  29.       clockElement.setAttribute('class', 'present-time')
  30.       timeDisplay[timeDisplay.length - 1].childNodes[1].appendChild(clockElement)
  31.       liveClock = document.querySelector('.present-time')
  32.   }
  33.   return liveClock
  34. }
  35. let updateTime = () => {
  36.   let isLive = JSON.parse(document.querySelector('.ytd-player-microformat-renderer').textContent).publication
  37.   if (isLive) {
  38.       let progressBar = document.querySelectorAll('.ytp-progress-bar')
  39.       let progressTime = progressBar[progressBar.length - 1].getAttribute('aria-valuenow')
  40.       if (isLive[0].endDate) {
  41.           let presentTime = new Date(Date.parse(isLive[0].startDate) + progressTime * 1000)
  42.           let date = (presentTime).toString().split(' ')
  43.           return ` (${date[3]}/${twoDigit(presentTime.getMonth() + 1)}/${date[2]} ${date[4]})  `
  44.       } else return formatTime(progressTime)
  45.   } else return ''
  46. }
  47.  
  48. let main = () => {
  49.   let liveClock = getClock()
  50.   let progressBar = document.querySelector('.ytp-progress-bar')
  51.   let observer = new MutationObserver(() => { liveClock.textContent = updateTime() })
  52.   observer.observe(progressBar, { attributes: true })
  53. }
  54.  
  55. document.addEventListener('yt-navigate-finish', () => { if (window.location.href.includes('/watch?v=')) main() })