How can I make the ytdl-core download complete before continuing with the code

Question

if (message.body.indexOf('/yt') != -1) {
      const url = message.body.replace('/yt ', '')

      await ytdl(url).pipe(fs.createWriteStream('video.mp4'))
      
      // the code below does not wait for the download to finish
      const media = MessageMedia.fromFilePath('./video.mp4')
      client.sendMessage(message.from, media, { sendMediaAsDocument: true })
   }

I want that ytdl-core finish the download before run the remain code.

Answer 1

When the download process is done, it will trigger close event. You can listen to the close event. But, you have to wrap it into a Promise, then just await on the promise.

if (message.body.indexOf('/yt') != -1) {
  const url = message.body.replace('/yt ', '')

  await new Promise((resolve) => { // wait
    ytdl(url)
    .pipe(fs.createWriteStream('video.mp4'))
    .on('close', () => {
      resolve(); // finish
    })
  })

  // the code below does not wait for the download to finish
  const media = MessageMedia.fromFilePath('./video.mp4')
  client.sendMessage(message.from, media, { sendMediaAsDocument: true })
}