declarative javascript sollution to fizzbuzz

fizzbuzz.js

// It's more interesting if the numbers are -50 to +50.

const range = (x1,x2) => [...Array(x2-x1+1)].map( (_,i)=>x1+i )

const maybeFizz = x => x%3==0 ? 'fizz' : undefined
const maybeBuzz = x => x%5==0 ? 'buzz' : undefined

const join = (s1,s2) => [s1,s2].join('')

const maybeText = x => join(maybeFizz(x),maybeBuzz(x))

const textOrNum = x => maybeText(x) || x

const res = range(-50,50).map(textOrNum)

console.log(res)