It is probably very rare that you will only be visualizing static local data. The power of data visualization usually lays on the ability to visualize dynamic data typically generated by a server-side program. Since this is a common use case, D3 comes with some handy helper functions to make this task as easy as possible. In this recipe, we will see how a remote data set can be loaded dynamically, and we will update an existing visualization once loaded.
Open your local copy of the following file in your web browser:
https://github.com/NickQiZhu/d3-cookbook/blob/master/src/chapter3/asyn-data-load.html
In the code example of the asyn-data-load.html file, we will load data dynamically from the server on user's request, and once the data is loaded, we also update our visualization to reflect the new expanded data set. Here is the code where we do that:
<script type="text/javascript">
var data = [ // <-A
{expense: 10,...
