It would be nice to be able to specify fix panel sizes in order to create a layout where a sidebar is resizable but should always start out at for example 300px and when collapsed be 56px and show icons insteas of menu item labels.

Using percentages makes it hard to implement such a use case, one needs to calculate the sizes based on the container width, then update the useSplitter props accordingly which is not what i expected.

Also at least for vue, changing panel array and sizes at the same time throws errors since it tries to validate the new sizes against the old panel array which does not match