downloadPdf.js

// Download multiple pdf. this force download instead open on browser
// Warning: with esternal url a CORS may occour
urls.forEach((url, i) => {
  fetch(url)
    .then(resp => {
      resp.blob()
        .then(blob => {
          var downloadLink = document.createElement('a')
          downloadLink.target = '_blank'
          downloadLink.download = `document${i}.pdf`
          var URL = window.URL || window.webkitURL
          var downloadUrl = URL.createObjectURL(blob)
          downloadLink.href = downloadUrl
          document.body.appendChild(downloadLink)
          downloadLink.click()
          document.body.removeChild(downloadLink)
          URL.revokeObjectURL(downloadUrl)
        })
    })
}