D3.js By Example by 2015

Author:2015
Language: eng
Format: epub, mobi
Publisher: Packt Publishing

Handling mouse events

The mouse is the most common device available to users for interacting with D3.js visualizations. Touch is commonly used in case of tablets, and in many cases, touch events can be mapped to mouse events. In this chapter, we will focus exclusively on the mouse. But most of everything we cover also applies to touch. Touch concepts such as pinching can also be easily supported on touch devices with D3.js.

To work with mouse events in D3.js, we attach event listeners to the SVG elements for which we desire to handle the events. The handlers are added using the .on() function, which takes as parameters the name of the event and a function to call when the mouse event happens.

We will examine the handling of four mouse events: mousemove, mouseenter, mouseout, and click.

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