fonction

A modern practical functional library

💚 Friendly type definition

All functions written by TypeScript. The type system infers the optimal return value for the argument.

Provide universal functions as ES modules and UMD

We pay particular attention to the bundle size to prevent unused code from getting in when bundling.

All functions have TSDoc-style comments. This is useful because you can learn more about the function when using the latest editors.

Not only number but also bigint is supported as standard.

Support multi platform of Node and Deno.