> LGPL specifically talks about linking compiled binaries.
That's the context where LGPL is used most often, but the license itself is more general than that. In particular 4/d/0 in [1].
AFAIK, LGPL is about replaceability. If you distribute a compiled program (yes, a minified JS program should qualify) then you need to distribute the source of the LGPL part and document a way how the user can replace that LGPL part in your program with their own modified copy.
[1] https://www.gnu.org/licenses/lgpl-3.0.en.html