vue 下载阿里云OSS远程图片，跨域问题， No 'Access-Control-Allow-Origin' header is present on the requested resource

• 使用以下方法,也不用去阿里云后台设置允许跨域了

downloadIamge(imgsrc, name) {
  const src = `${imgsrc}?t=${new Date().getTime()}`
  fetch(src).then(res => {
    res.blob().then(myBlob => {
      const href = URL.createObjectURL(myBlob)
      const a = document.createElement('a')
      a.href = href
      a.download = name
      a.click()
      a.remove()
    })
  })     
}