can tree and grid be resized of dragable event, the images belows shows that the div can be dragged and resized. how does the suite make this function work?
There is no such feature in the grid?tree itself, but you may place your grid/tree into the window/layout and resize that window or a layout cell, so the grid/tree will also resize.
https://dhtmlx.com/docs/products/dhtmlxWindows/samples/07_attach_components/01_grid.html
https://dhtmlx.com/docs/products/dhtmlxLayout/samples/04_attach_components/01_grid.html