Extract a `PlotlyJS.Plot` object from `Plots.Plot`


I’m looking forward to how to use Dash.jl conveniently.
For interactive plotting, I found that PlotlyJS.Plot object should be returned in a callback of Dash.jl
like this examples.
And I’m familiar with Plots.jl so I’d like to keep using the APIs of Plots.jl.
So is there any way of extracting PlotlyJS.Plot object from Plots.Plot object?

See backend_object(plt::Plot).