原生 fetch download file

download.js

async function download (url = '', headers = {}) {
  try {
    const res = await fetch(url, {
      headers
    })
    const blob = await res.blob()
    // 获取后端headers里面的文件名
    const filename = decodeURI(res.headers.get('Content-Disposition').split('filename=')[1])
    // download
    const a = document.createElement('a')
    a.download = filename
    a.style.display = 'none'
    a.href = window.URL.createObjectURL(blob)
    document.body.appendChild(a)
    a.click()
    document.body.removeChild(a)
  } catch (err) {
    console.error(err)
    // toast error message
  }
}

thanks for the issue comment