Number(process.env.PORT) || 3000
That line shows up in a lot of config files, and it has two bugs hiding in it.
Misspell PORT in your .env and you don't get an error, you get 3000, and you find out in production. Want to set PORT=0 on purpose? You can't: Number('0') || 3000 is 3000 too. The || fallback can't tell "missing" from "zero," and process.env hands you string | undefined regardless, so every read sits one coercion away from a quiet bug.
I got tired of writing that coercion by hand and keeping it correct, so I built envapt. On Node, Bun, and Deno it reads process.env and your .env files; off Node the source is pluggable, so the same reads work on Cloudflare Workers and in the browser.
The typed read
