html javascript - canvas to png, jpg file

function savePng(canvas, name) {
  saveImage(canvas.toDataURL('image/png'), name, 'png')
}

function saveJpg(canvas, name) {
  saveImage(canvas.toDataURL('image/jpg'), name, 'jpg')
}

function saveImage(dataUrl, name, type) {
  const link = document.createElement('a')
  link.href = dataUrl
  link.download = `${name}.${type}`
  link.click()
  URL.revokeObjectURL(link.href)
}