from ggplotly, open all new hyperlinks in the same new window/tab

I am using the following example code where click on the point opens a link:

data(mtcars)
mtcars$urlD <- paste0("http://google.com/search?q=", gsub(" ", "+", rownames(mtcars)))

p <- ggplot(data=mtcars, aes(x=wt, y=mpg, color=factor(carb), customdata=urlD)) + geom_point() 
pp <- ggplotly(p)
ppp <- htmlwidgets::onRender(pp, "
     function(el, x) {
       el.on('plotly_click', function(d) {
         var url = d.points[0].customdata;
         window.open(url);
       });
     }
  ")

It works fine but every new click opens new window/tab. Is there any way to make it use the same window? (I mean not the window with the plot but the window where the first link was opened) In usual javascript, I would use the name parameter of window.open(), like this: window.open(url, 'MyTargetWindow'); - but it doesn't help here. Any workarounds?