SizeObserver does not return size

[karelvrabeckv]

Hello,

I installed my web application with the latest version of Trame. Suddenly, SizeObserver stopped to return the screen size:
{'size': {}, 'pixelRatio': 1.25, 'dpi': 120, 'name': 'content_size'}

@change("content_size")
def on_content_size_change(self, content_size, **kwargs):
    if content_size is None:
        return
    
    print(content_size)
    ...

...

with layout.content:
    with trame.SizeObserver("content_size"):
        with vuetify3.VContainer(fluid=True, classes="pa-0 fill-height"):
            view = vtk.VtkLocalView(
                ...
            )
            ...

I use SizeObserver for synchronizing the client with the server while picking points and cells.
Before, it returned width, height... Is this a bug in Trame?

Thank you very much!

[jourdain]

Wow, good catch.

So it is fixed in the two latest trame-client>=3.0.2 or trame-component>=2.3.1 depending on where you are grabbing the SizeObserver from. It is has recently be added to the built-in trame client to make trame-component even more optional...

For reference:
The issue come from the fact that we were sending the size as a native JS object (DOMRect) which before was getting converted into a plain/json object over the network. But with the new network (wslink>=2), that conversion is not happening automatically (as we now can send inline binary structure) and require manual conversion. I'm expecting similar issue to happen with trame>=3.6, but hopefully we can find a middle ground to still support automatic JSON conversion for native JS object.