.point-create is the dot
.tipArrow-create is the arrow
`showTipArrow= () = > {
d3.selectAll(".point-create").on("click",function(){//
let $thisDom=d3.select(this);
d3.selectAll(".tipArrow-create").filter(function(d,i,list){
let arrowDom=d3.select(this);
if(arrowDom.attr("regId")==$thisDom.attr("regId")){//regId
arrowDom.attr("display","");
}
});
});
}`
showTipArrow d3.select("-sharppoints").append("use")
.attr("id", "red_"+thisId)
.attr("regId",thisId)
.attr("type", "point")
.attr("x", width-10)
.attr("y", cyRed-10)
.attr("yy",cyRed)
.attr("class", "point-create")
.attr("xlink:href","-sharppoint")
.call(d3.drag()
.on("start", dragstarted)
.on("drag", dragged)
.on("end", dragended));
this.showTipArrow(); the result is that the added click function will not take effect until it is clicked twice. Does anyone know what"s going on?