TypeStrong/ts-node: TypeScript execution and REPL for node.js
Useful-looking tool that makes TypeScript usable on the command line, amongst other things.
Copy to clipboard pure JavaScript - JSFiddle
Example code for copying rich text to the clipboard from JavaScript.
Beyond appendChild: Better convenience methods for HTML - DEV Community
Short article about some handy DOM manipulation methods and idioms in JavaScript.
The reduce ({...spread}) anti-pattern - RichSnapp.com
Interesting article about the potential pitfalls of using reduce and spread for cool JavaScript one-liners. I don't think I'm in the habit of using this particular pattern, but I should probably keep an eye out for it.
The Pitfalls of Boolean Trap
Good little article about the pitfalls of using boolean values as parameters for a function. Not the first time I've seen this sort of thing (I'm sure I read a similar article years before, and a similar thing in a coding book even earlier).
Still good advice.
At least it's a little better in languages with keyword arguments.
Brian Lonsdorf: Hey Underscore, You're Doing It Wrong! – FunctionalTalks.org
Talk about things to do with JavaScript, functional programming, etc.
Starboard
Site that sort of provides active JavaScript notebooks, with a view to doing most/all of the work on the client side. I was sort of hoping there'd be a self-host option or something and I'm not seeing that. On the other hand it could be a good tool for tinkering with and prototyping code.