You can npm install type-fest and use them in your project or simply bookmark this as a reference for the many advanced types that are built in to the TypeScript project itself. Submitting your own types is promoted. Also, a good idea on declined types:

If we decline a type addition, we will make sure to document the better solution here.

This was from an AMA, but Sindre turned it into a blog post since his response was so popular. Also, his answer applies particularly to Node.js. Sindre writes on his blog:

Make small focused modules for reusability and to make it possible to build larger more advanced things that are easier to reason about.

And, also…

It doesn’t matter if the module is one line or hundreds. It’s all about containing complexity. Think of node modules as Lego blocks. You don’t necessarily care about the details of how it’s made. All you need to know is how to use the Lego blocks to build your Lego castle. By making small focused modules you can easily build large complex systems without having to know every single detail of how everything works.

This is a macOS app for the gifski encoder, which converts videos to GIF animations using pngquant’s fancy features for efficient cross-frame palettes and temporal dithering. It produces animated GIFs that use thousands of colors per frame.

Sindre is so good at building these little Mac apps that do one thing well. 🥇

This works just like the classic, only it’s smaller, sets box-sizing: border-box, and includes normalizations for the latest Chrome, Firefox, and Safari.

Sindre Sorhus (author of the excellent Refined GitHub) is at it again, this time bringing his skills to bear on our most beloved/hated social network:

a browser extension that simplifies the Twitter interface and adds useful features

The list of improvements is vast, but a GIF is worth a million words.