Hi. I just experienced an error in my vaadin app when I use the button to hide/show the menu bar:
ResizeObserver loop limit exceeded (http://localhost:8080/home:0:0)
Can someone give me a hint about how to find the cause of this and how to fix it? I am using Vaadin flow and didnt change any js files.
Thanks!
Probably undefined behavior caused by using setVisible instead of creating new instances. But you could also try to define a width on your menubar like 100%
do you mean js code or java code ? I have not used setVisible as far as my search says. And I didnt touch the javascript files
How do you show/hide the menubar if not with setVisible? 
I’m talking pure Java
well vaadin does this for me 
i am just working on my java classes. i hope i didnt touch any flow files i didnt want to change…
i generated the vaadin app with the wizzard and worked from there
the only thing i tried to change was maybe application.properties or css files
The sentence “I use a button to hide/show the menu” is of interest here
this default button with 3 lines
close and open the menu (minimize it to left)
So you are not talking about the menubar, you are talking about the app layout and the default minimize / open button?
ah yes maybe thats the correct name. yes i have the app layout 
sorry
Can’t really help with that, sorry 
I’m not using it
yes that one
ah damn ok
thanks anyways!
Idea so that this thread doesn’t get lost: add a (unresolved) in front of the headline - so that other people still take it look at it instead of thinking “a lot of replies, could be fixed”