It appears to me that the `expanded/collapsed` part of the names got switched around, since I'd expect the following convention: - `v` == expanded - `>` == collapsed
172 B
18x18px
172 B
18x18px
![](/Sakurai/pdf.js/raw/commit/3170a4c40ac52c578df44752f2ede9e971230d9d/web/images/treeitem-expanded@2x.png)