enable updating the config of a plot without changing other parameters

We can change the layout of an existing plot with Plotly.relayout, change the data with Plotly.react, but how to change the config of a plot without changing the other parameters?

Example:

// happens when clicking on a button
var config = element.config;    // problem: this doesn't exist!   <-- how to get the current config state of the plot?
config["staticPlot"] = true;  // let's add a configuration parameter
Plotly.react(element.id, element.data, element.layout, config)

How to get element.config in the same way element.layout and element.data exist?

Start by reading the Plotly.relayout and Plotly.react entry points referenced in the issue, then trace how an existing plot exposes its data, layout, and configuration state. The work is done when a plot's current config can be obtained and updated without changing its other parameters, with the behavior covered by the relevant tests.