Structure of the attachment area and how its parts are composed. The top drawing is the area with files in it, the bottom one is the empty area inside a Sender header.
Name
Description
1
root
The whole attachment area.
2
list
The row of added files, from items. It renders when there is at least one file.
3
card
One file in the list. It shows the file's icon, name and status, and a remove button.
4
placeholder
The drop area shown when there are no files, filled by placeholder with an icon, a title and a description.