Comment by alluro2
Dockview is phenomenal, and congrats to @mathuo on a great project - I've recently thoroughly tested 6-7 available libraries in this category, and dockview is certainly in the top. GH is also very active and well maintained.
The only reason I in the end went with FlexLayout (https://github.com/caplin/FlexLayout) for a recent project was lack of support for predefined/restricted dimensions, - which was since added in a very good way - and that I really liked how FL handles side panels, with vertical tabs, and their predefined behavior.
Looking very much forward to using Dockview in one of the next projects.
Both look great. The aesthetics of FlexLayout's drag box are _really_ nice, and the vertical tab handling is such a good touch. Dockview looks like a strong contender though, and the HN effect on stars may well give it momentum to integrate the relatively small edges that FlexLayout enjoys.