TLDR: Use for...of instead of forEach in asynchronous code.
Array.prototype.forEach is not designed for asynchronous code. (It was not suitable for promises, and it is not suitable for async-await.)
For example, the following forEach loop might not do what it appears to do:
| /** | |
| * List unique CSS properties for all DOM elements | |
| * Initially created to list unique font stacks on a page | |
| * @see {@link http://stackoverflow.com/a/35022690/ Inspired by this StackOverflow answer} | |
| * | |
| * @see {@link https://gist.github.com/macbookandrew/f33dbbc0aa582d0515919dc5fb95c00a/ URL for this file} | |
| * | |
| * @author AndrewRMinion Design (https://andrewrminion.com) | |
| * @version 1.1 | |
| * |