Jest ESM Issues: A Meta Tech Cautionary Tale

Jest, ESM, and the Meta Tech Conundrum: A Cautionary Tale

You know that moment when you’re deep in your TypeScript project, everything’s going smooth, and then you import a simple CSV parsing library? Yeah, that’s when Jest decides to remind you about Facebook’s - sorry, Meta’s - opinions on JavaScript modules.

Here’s what happened in my project today: A simple import from csv-parse/lib/sync led me down a rabbit hole of Jest configuration hell. Why? Because Jest, in its infinite CommonJS wisdom, throws a tantrum when it sees modern ES Modules.