waterfall() is not a function

[warmjaijai]

Following exactly the same with the instruction but console log
waterfall() is not a function

Not sure where the problem is.

[mystist]

What's about console.log($.fn.waterfall)?
Make sure the code runs after the source file successfully loaded.

Also, definitely fork the repo and run it on your local, you'll see how it works.

[andrei-gheorghiu]

It means bootstrap-waterfall.js has not yet been loaded when you're calling .waterfall() in your page.

This is (most likely) due to linking the script directly from github: https://raw.githubusercontent.com/Mystist/bootstrap-waterfall/master/dist/bootstrap-waterfall.js
or https://rawgithub.com/Mystist/bootstrap-waterfall/master/dist/bootstrap-waterfall.js

Github should not be used as cdn. Specifically, they do not add the cors header to allow loading from all.
To fix, just download the script in your project and include from there.