How can I make double click event on node in d3.js?

If using D3 Observable:

const nodeEnter = node.enter().append("g")
        .on("dblclick", d => {
          d3.event.preventDefault();
          // do your thing
        });

You can use "dblclick" instead of "dbclick":

nodes.on("dblclick",function(d){ alert("node was double clicked"); });