Events

D3 Events

Hover over red dot. Mouse press the blue dot. Watch the console events.

<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <script src="https://d3js.org/d3.v3.min.js"></script>
  <style>
    body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; }
    .red {
      fill: red;
    }
    .blue {
      fill: blue;
    }
    .orange {
      fill: orange;
    }
  </style>
</head>

<body>
  <p><a href="https://blockbuilder.org">Blockbuilder</a></p>
  <script>
    // Feel free to change or delete any of the code you see in this editor!
    var svg = d3.select("body").append("svg")
      .attr("width", 960)
      .attr("height", 150)

svg.append("circle")
      .attr("class", "red")
      .attr("cx", 100)
      .attr("cy", 75)
      .attr("r", 20);
    
    svg.append("circle")
      .attr("class", "blue")
      .attr("cx", 200)
      .attr("cy", 75)
      .attr("r", 20);
    
    d3.select("circle.red")
      .on("mouseenter", function (){
      	console.log("MOUSEENTER", this)
    	})
      .on("mouseleave", function (){
      	console.log("MOUSELEAVE", this)
    	})
    
    d3.select("circle.blue")
      .on("mousedown", function (){
      	console.log("MOUSEDOWN", this)
    	})
    	// use namespace to register multiple handlers
    	// Otherwise the same handler will unregister the previous
      .on("mousedown.second", function (){
      	console.log("MOUSEDOWN 2", this)
    	});
    
    d3.select("a")
      .on("click", function (){
      	d3.event.preventDefault();
    	})
    	// use namespace to register multiple handlers
    	// Otherwise the same handler will unregister the previous
      .on("click.second", function (){
      	console.log("CLICKED 2", this);
    	});
  </script>
</body>

https://d3js.org/d3.v3.min.js