autoresizing behaviour

As mentioned in https://github.com/plotly/plotly.py/pull/942#issuecomment-400135253, in the JupyterLab display, in a lot of cases, it would be very nice if the plot would automatically resize when the window/tab resized.

Since there are situations where this wouldn’t be desirable e.g. in the case of large/slow plots, it would be very good if this behaviour could be chosen by the user with an autoresize property/argument/config

[jonmmease]

Thanks for the suggestion @dhirschfeld. The width resizing with fixed height is being implemented in #1117

[jonmmease]

Alright, I just pushed out plotlywidget@0.1.1 and plotly==3.0.0rc10 and I added responsive resizing in JupyterLab (the classic notebook doesn’t seem to share the same PhosphorJS resize event).

The intended behavior is for plots to expand to fill their container on construction, and when the container is resized. But, if the figure has layout.width or layout.height specified explicitly then no resizing takes place.

I think this is a nice balance. Figure’s will resize unless you say what size you want. For plots that are expensive to resize, the user just needs to decide what size they want and it will stick there.

Give it a try and see what you think