Why position absolute on a hidden element?

[theredwillow]

I noticed that there is a hidden file input used.

https://github.com/peterfreeman/ngx-dropzone/blob/b5ea2f156024b869dc10cb87e354719e3fab43f3/projects/ngx-dropzone/src/lib/ngx-dropzone/ngx-dropzone.component.scss#L50

The absolute positioning on that seems to be breaking the overflow functionality of one of my Material elements.

https://material.angular.io/components/sidenav/overview

Whenever I disable that property in my dev tools, the large blank space below my page disappears. Is there a reason this is necessary? Could it be omitted?