todo.txt

Implementation:

* Welcome and thank-you articles
* Consider flattening the hierarchy, removing strict old/new thing
* Bring back "Less" button
* Consider internal scrollbar for main

Topics:

* const does not freeze objects, only referneces
* tail recursion (and the pun)
* show arrow functions with bodies
* arrow functions and "this" and how and when it helps
* multiline template literals
* tagged template literals
* ES6 imports

index.html:      <!-- TODO const does not freeze objects, only references -->
index.html:      <!-- TODO: tail recursion (and the pun) -->
index.html:      <!-- TODO: arrow functions with bodies -->
index.html:      <!-- TODO: arrow functions and "this" and how and when it helps -->
index.html:      <!-- TODO: multiline -->
index.html:      <!-- TODO: tagged template literals -->
index.html:      <!-- TODO: ES6 imports -->