Is it possible to update just `layout`, not whole `figure` of Graph in callback?

This is correct. Right now, there is not a way to update a nested attribute of a property.

Ideally, I’d like to support this more generally through two different solutions:

  1. Allow the developer to update nested properties in callbacks with something like
@app.callback(Output('my-graph', 'figure.layout.range'))
  1. Provide a way to tell which input was fired and use that in conjunction with Plotly.react to provide incremental updates to the figure, see https://github.com/plotly/plotly.js/pull/2341#issuecomment-364257543

For now, you can use jimmybow’s dcc package or you’ll just have to return the entire figure each time.

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