Join MDN and developers like you at Mozilla's View Source conference, 12-14 September in Berlin, Germany. Learn more at https://viewsourceconf.org

substate

substate
Type: one of the values below
On splitters which have state="collapsed" and collapse="both", determines which direction the splitter is actually collapsed in. Since collapse="both" is a Gecko 1.9+ feature, this will have no effect on earlier versions.
before
The element immediately before the splitter is collapsed.
after
The element immediately after the splitter is collapsed.

Document Tags and Contributors

 Contributors to this page: Sheppy, pippijn, Marsf, Vf8S8t, A1kmm
 Last updated by: Sheppy,