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.

未指定文件或测试。首先使用版本 5.24 和 6.0 运行提供的 ipywidgets 示例，然后调查 FigureWidget/AnyWidget 的调整大小行为以及 autosize 的后续工作。完成的标准是图形能够可靠地填满其容器，并在容器大小发生变化时自动响应，同时为复现的案例添加回归测试。