canPlayVP9.js

const vp9CodecType = 'video/webm; codecs="vp9"'

function checkMediaSourceWay() {
  return 'MediaSource' in window && MediaSource.isTypeSupported(vp9CodecType)
}

function checkHTMLMediaElementWay() {
  return document.createElement('video').canPlayType(vp9CodecType) === 'probably'
}

export function canPlayVP9() {
  return checkMediaSourceWay() || checkHTMLMediaElementWay()
}