Commento embed

Adding the src url creates a script element into your blog similar to the HTML embed above, so if you add any additional JavaScript that uses the imported library, it will look for the library’s source url. In this way you can add more custom JS by adding the src url in a similar manner as Commento and whatever additional code is needed to make it work.

Hope that makes sense!

I’d also recommend checking out the “Share what you are working on and using” thread to discover more ways to use Custom JS: