Recursive implementation to convert decimal to binary

decimal-to-binary.js

const input1 = 233;
const input2 = 0;

const decimalToBinary = (quotient, remainder) => {    
    if (quotient === 0) {
        return (remainder ?? '').toString();
    }

    return `${decimalToBinary(Math.floor(quotient / 2), quotient % 2)} ${(remainder ?? '').toString()}`;
}

console.log(decimalToBinary(input1));
console.log(decimalToBinary(input2));