[rogerhoward]

Angular as the overall app framework, and D3.js for the canvas fun. Take a look at his script.js, it's pretty straightforward.

[dxoapv]

Can it be done without Angular.js?

[ibrahima]

AngularJS is just being used to make those custom HTML tags (called "directives" in Angular-speak). It likely has nothing to do with the actual functionality.

[vicapow]

Yes