Each directory is it's own individual little code sample. There are separate README files in each of the directories explaining the functionality.
I have more code samples involving more javascript (React.js/ES6/node.js) and mobile (Swift/React Native) technologies that I can provide upon request.
Below are the links to the samples running:
card_pairs - https://astanton.github.io/card_pairs/
image_crop - https://astanton.github.io/image_crop/
post_pager - https://astanton.github.io/post_pager/