Customization to the save button of Holoview graph

Hi, I want to build a button in react, and once this button is clicked, it will trigger the “save button” that’s embedded into the graph, which is also the fourth grey button from top(image below)

The issue I am facing is that I don’t how to trigger this Save button in JS, what’s more, once I click the save button, the output file is always named “bokeh_plot” Are there any to to change it?

Thank you for your help