What is d3.js
Note that some visualizations with d3.js do not work with IE8 and below. Chrome and Firefox are ok. I haven’t tested Safari yet.
What has d3 to do with this site
This site is primarily about Excel, but more importantly about extending Excel to integrate with all good things out there. I have already covered topics such as Get Data From Google Docs, Mapping and adding markers to maps, Data Driven Mapping applications, From VBA to Google Apps Script, Google Visualization, Excel JSON conversion, Rest to Excel library and many more.
Using d3.js as a framework will open up a whole new opportunity for integrating Excel with modern web based visualizations.