download attribute

a の download 属性はクロスオリジンでは動作しない

https://stackoverflow.com/questions/2408146/href-image-link-download-on-click

https://stackoverflow.com/questions/23872902/chrome-download-attribute-not-working-to-replace-the-original-name

https://macarthur.me/posts/trigger-cross-origin-download/

https://www.codeproject.com/Questions/5273909/How-to-download-image-file-from-cross-domain

same-origin → 302 リダイレクトはうまくいかない？

別ドメインへの302 redirectを返すAPIを呼び出すとCORSエラー – rinoguchi's techlog 2019