Download file using JavaScript

downloader.js

const downloader = function (url, filename) {
  // change these two variables
  if (!url) throw new Error('url is needed!')
  filename = filename || 'newfile'

  fetch(url)
    .then(res => res.blob())
    .then(blob => {
      const url = URL.createObjectURL(blob)
      const anchor = document.createElement('a')
      anchor.href = url
      anchor.download = filename
      document.body.appendChild(anchor)
      anchor.click()
      anchor.remove()
    })
}

export default downloader