问Mousemove中的Mousemove会停止鼠标释放

EN

var ternary = d3.select("#ternary");

var pointer;
var selector = ternary.append("g");

selector.on("mousedown", function() {
  console.log('down');

  selector.on("mousemove", function() {
    console.log('move');
    var mouse = d3.mouse(this);
    console.log(mouse[0])
    console.log(mouse[1]);
    // continues firing after mouse button released 
    // how do I clear?
  });

  selector.on("mouseup", function() {

    alert('release');
    //this event doesnt fire
  });
});