fizzbuzz.js

/**
 * FizzBuzz short and quick method. 
 */

const fizzbuzz = (int) => !(int % 15) ? "FizzBuzz" : !(int % 5) ? "Buzz" : !(int % 3)  ? "Fizz" : int;

let i = 1;
console.log(new Array(100).fill().map(_ => fizzbuzz(i++)))


/**
 * FizzBuzz longer but versatile method. 
 */
 const getFizzBuzz = (testCases, j) => {
    const outArray = [];
    for (let i = 1; i <= j; i++){
        output = '';
        for (let key in testCases){
            if (!(i%key)){
                output += testCases[key]
            }
        }
        if (output == '')
            output = i;
        outArray.push(output);
    }
    return outArray;
}

const testCases = {3: "Fizz", 5: "Buzz", 6: "HAHA"}

console.log(getFizzBuzz(testCases, 100))