Lockfile contains exact state of the npm-managed code, making it reproducible exactly the same every time.

For example without lockfile in your package.json you can have version 5.2.x. In your working directory, you use 5.2.1, however on repo, 5.2.2 has appeared, matching your criteria. Now let’s say a new bug appeared in 5.2.2.

Now you have mismatched vendor code, that can make your code behave differently on your machine, and your coworker’s machine, making you hunt for bug that wasn’t even on your side.

Lockfile prevents that by saving an actual state of vendor code.

The way I use it is ‘undefined’ is literally undefined (not set), but null means no value - explicitly.

Co-pilot?

Because terminal emulators are literally the old terminal emulators (ye oldy screens + keyboard combos that looked like a computer but were just IO) and everything modern they do is just a hack.

Arch is buying furniture, Gentoo is Ikea and LFS is making everything out of plywood yourself.