Js-splitter
https://phuoc.ng/collection/html-dom/create-resizable-split-views/
Top
Bottom
Top
Bottom
Top
Bottom
LEFT
LLLLLL
RRRRR
ZZZZZZ
https://phuoc.ng/collection/html-dom/resize-columns-of-a-table/
https://phuoc.ng/collection/html-dom/drag-and-drop-table-row/
https://andrienko.org/splitter/