How to specify multiple event types in d3.js?

@aubrey 

In d3.js, you can specify multiple event types by chaining them together using the .on() method. This method allows you to bind multiple event types to the same selection.

Here's an example of how you can specify multiple event types in d3.js:

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d3.select("circle")
  .on("mouseover.click", function(d) {
    // Do something on mouseover or click
  })
  .on("mouseout", function(d) {
    // Do something on mouseout
  });

In this example, the circle element will trigger the function when either a "mouseover" or "click" event occurs, and a different function when a "mouseout" event occurs.

You can use this method to specify as many event types as needed for your particular use case. Just separate them with a period (.) in the event type string passed to the .on() method.