I’ve been messing about with various visualisation using D3 and leaflet. These tools are great but they interact with a browser and you will want to check your code before sending it to a Gist so that it can be rendered on Bl.ocks.

To do this I use a nodejs application called http-server. Before you install it you need to install something called Nodejs.

The links have all the documentation for doing so.

Once you have that installed, you simply navigate to your folder with your website in either a terminal or powershell, and type http-server. When you are finished, type ctrl-C.