d3.js undefined data value in callback function click event [duplicate]

Question

I'm trying to pass a value to a d3 click event bind to a group composed of a circle and a letter. However this value remains 'undefined' in the callback function. On the other hand if I pass the same value to another function of the same group, such as .text(d => d.value) that works fine. The issue is only with the click event. Please find my piece of code:

//The parent svg
var s = d3.select("#"+this.id) //this refers to the current object
        .append("svg")
        .attr("id",this.svgid)
        .attr("width","100%")
        .attr("height","100%");

//The value to be passed to the click event
const dd = [{value:"whatever"}];
            
var group1 = s.data(dd).append("svg:g");

//First element of the group = a circle
group1.append("svg:circle")
        .attr("cx","85%")
        .attr("cy","20%")
        .attr("r","10px")
        .attr("fill","#FFFFFF");

//Second element of the group = letter i
group1.append("svg:text").text("i")
        .attr("x","85%")
        .attr("y","25%")
        .attr("fill","#555555");

group1.append("svg:text").text(d => d.value).attr("x","50%").attr("y","50%");//This line works fine

group1.on("click",d => console.log(d.value));//This line returns 'undefined'--> Why?

I tried several flavors of the callback function such function(d){console.log(d.value);} but without success. Any idea?

Answer 1

Replace

group1.on("click",d => console.log(d.value));

with

group1.on("click",(e, d) => console.log(d.value));

Since D3 V6, event is passed as the first argument to the mouse event callbacks