Join Meet Automatically

joinMeetAutomatcally.js

(function() {
    Array.from(document.querySelectorAll('div[data-call-id]')).map(e => {
  return {
    'beginTime': new Date(parseInt(e.dataset.beginTime)),
    'url': `https://meet.google.com/${e.dataset.callId}`,
  }
})
  .filter(mtg => mtg.beginTime > Date.now()) // 過去のMTGには入らない
  .map(mtg => {
    const BeforeOffset = 5 * 60 * 1000 // 5分前には入る
    const leaveMillSec = mtg.beginTime - Date.now() - BeforeOffset
    setTimeout(
      () => {
        window.open(mtg.url, '_blank')
      },
      leaveMillSec
    )
    const leaveSec = Math.floor(leaveMillSec / 1000)
    console.log(`Meet ${mtg.url} will open in new tab after ${leaveSec}`)
  })
})();

meet.google.comで起動すると便利なはず。