Judging from this page (https://www.npmjs.com/browse/depended/is-even https://www.npmjs.com/browse/depended/is-even), it appears that many of its dependents are

Judging from this page (https://www.npmjs.com/browse/depended/is-even https://www.npmjs.com/browse/depended/is-even), it appears that many of its dependents are joke packages. For example: - is-is-even: checks if the passed function is is-even - is-odd-or-even: determines if a given number is odd or even. - is-ice-cream: Amazing lib to check if string contain your favorite ice cream flavor Probably the main reason it has so many downloads is that it's imported as a module (rather than integrated as a constituent function) by the author's popular handlebars-helpers library of utility functions. Imagine if underscore.js were to separate out first() as its own module. Then you'd have a similar situation.