d3 trigger mouse click on specific coordinates

Question

I have an issue on triggering mouse event on a svg.

I am using the library d3.js to handle some graphic tasks. Specifically, when I manually click on a position on the svg, d3 draws a red or blue (depending on the path I am clicking on) circle on it and then returns the d3.mouse coordinates of the click.

Now, suppose I have a set of coordinates and want to trigger programmatically click on the corresponding point on the svg, so that it draws a red or blue circle automatically. How can I achieve that?

I read many solutions here but none allows to click on specific coordinates (while I can easily click on a specific path, for example).

My ideal function would be:

    var svgd3 = d3.select('svg#id_svg')

    function d3click(x,y,svgd3){

    //does the click on [x,y, x,y are relative coord. depending only svg viewBox
    ...
    }

Any idea?

Thanks a lot!