getVideoDuration.ts

export default function getVideoDuration(src: string): Promise<number> {
  return new Promise((resolve, reject) => {
    const video = document.createElement('video')
    video.src = src
    video.addEventListener('loadedmetadata', () => {
      resolve(video.duration)
    })
    video.addEventListener('error', error => {
      reject(error)
    })
  })
}