Learning D3.js 5 Mapping - Second Edition

Experiment 4 – using updates and transitions to enhance our visualization

For our next experiment, we will take all of our combined knowledge and add some smooth transitions to the map. Transitions are a fantastic way to add style and smoothness to data changes.

This experiment will, again, require us to start with example-3.html. The complete experiment can be viewed at http://localhost:8080/chapter-4/example-5.html.

If you remember, we leveraged the JavaScript setInterval() function to execute updates at a regular timed frequency. We will go back to this method now to assign a random number between 1 and 33 to our existing color() function. We will then leverage a D3 method to smoothly transition between the random color changes.

Right ...