Not that this graph has anything meaningful, but it was easy to create using visjs.org. Follow along and I’ll show you have to create this on you Jekyll Blogs. You can also view a good tutorial by Emma Tosch.
Create a subdirectory
Create the following
but don’t include any
You can view the full file _includes/head.html but below are my changes.
Note this needs to go near the bottom of the _layout/post.html
Here’s a sample header on my markdown page
If you get stuck, checkout the source repository