clickOpts: Create an object representing click options
In sheikhbarabas/shiny: Web Application Framework for R

This generates an object representing click options, to be passed as the click argument of imageOutput or plotOutput.

1	clickOpts(id = NULL, clip = TRUE)

`id`	Input value name. For example, if the value is `"plot_click"`, then the click coordinates will be available as `input$plot_click`.
`clip`	Should the click area be clipped to the plotting area? If FALSE, then the server will receive click events even when the mouse is outside the plotting area, as long as it is still inside the image.