XMLHttpRequest.upload.onprogress not Working with HTTPS
问题 Issue I have a page where users can upload files with the help of FormData and an XMLHttpRequest . Uploading the file works fine. But the upload.onprogress is only working when uploading from an HTTP connection . HTTPS HTTP I've tested this on Heroku and on an Amazon EC2 instance. But it's always the same: Progress is shown when uploading via HTTP Progress event is never triggered when uploading via HTTPS Javascript (Angular 7) const xhr = new XMLHttpRequest(); let progress = 0; /** THIS