Figure resizing with AnyWidget doesn't work as expected

See: https://community.plotly.com/t/plotly-v6-0-figure-resizing-with-ipywidgets/89424

import ipywidgets as widgets
import plotly.graph_objs as go
from ipywidgets import HTML, VBox

fig = go.FigureWidget(data=[go.Scatter(x=[1, 2, 3], y=[4, 5, 6])])

custom_css = """
<style>
.plot-container {
    width: 100%;
    height: 100%;
}
</style>
"""
fig.add_class("plot-container")

container = VBox(
    [fig],
    layout=widgets.Layout(
        width="500px",
        height="600px",
        border="solid red",
    ),
)

display(HTML(custom_css), container)

5.24

6.0

A follow-up:

fig.layout.autosize = True

works, but it is poorly implemented. For example if it is set before displaying fig, it many times does not respect this decision. So I usually set it after display. Still if container size changes, it is not going well on its own and you may need to reset it. Honestly, to me it looks like sending a message through this trait which upon setting it again to same value works, although a Bool trait does not work like that. Ideally we should set this once and javascript behind the scene should observe the container size change automatically.

No se nombran archivos ni pruebas. Empieza ejecutando el ejemplo de ipywidgets proporcionado con las versiones 5.24 y 6.0; después, investiga el comportamiento de redimensionado de FigureWidget/AnyWidget y el seguimiento de autosize. Se considera terminado cuando la figura llena de forma fiable su contenedor y responde automáticamente cuando cambia el tamaño del contenedor, con una prueba de regresión para el caso reproducido.