JavaScript Implementation of FizzBuzz in functional programming

const isFizz = number => number%3 ==0;const isBuzz = number => number%5 ==0;const range = (start, end) => [...new Array(end - start).keys()].map((n) => n + start);const doFizzBuzz = (start, end) => range(start, end).map((number => {  if(isFizz(number) && isBuzz(number)) {    return 'FizzBuzz';  } else if(isFizz(number)) {    return 'Fizz';  } else if(isBuzz(number)) {    return 'Buzz';  } else {    return number;  } })) .join(`
`);console.log(doFizzBuzz(1, 101));