is-odd Dependency Disaster

is-odd npm v3.0.1 downloads 4M/month downloads 127M Travis passing Returns true if the given number is odd, and is an integer that does not exceed the JavaScript MAXIMUM_SAFE_INTEGER. is-even npm v1.0.0 downloads 218k/month downloads 2M Travis passing Return true if the given number is even. Dependencies (1) is-odd var isOdd = require('is-odd'); module.exports = function isEven(i) { return !isOdd(i); };

A video alternates between npm package pages for is-odd and is-even with increasingly astonished Vince McMahon reaction shots. The punchline is that the supposedly separate is-even package simply depends on is-odd and returns its negation, turning a trivial function into an unnecessary dependency and prompting shock.

• @dev_meme / 357 2019-05-03
• @dev_meme / 3462 2021-07-26