Tiny, recursive autocurry (https://medium.com/javascript-scene/a-functional-programmers-introduction-to-javascript-composing-software-d670d14ede30)

curry.js

const curry = (
  f, arr = []
) => (...args) => (
  a => a.length === f.length ?
    f(...a) :
    curry(f, a)
)([...arr, ...args]);

// Unbound native-friendly since you can specify arity (typicaly native.length + 1)
const curry2 = (
  fn, arity = fn.length, arr = []
) => (...args) => (
  a => a.length === arity ?
    fn(...a) :
    curry2(fn, arity, a)
)([...arr, ...args]);