Author here.

After coding in Scala for a while, I brought a couple FP-isms with me to TypeScript, including Option and lazy. A couple other battle-tested, small classes and functions are also shared in this post.

I couldn't imagine working on a TypeScript codebase without these, and thought I'd share.

Blue text on black background is really hard to read. Also use a dark theme for code snippets to match the theme of the page.

Thanks, I'll get that fixed.