The Code

                    

                        // get the sart and end numbers from the page
function getValues() {
    //get the fizz number
    let fizzNumber = document.getElementById('fizzValue').value;  // "0"

    // get the buzz number
    let buzzNumber = document.getElementById('buzzValue').value; // "0"

    // get the end number
    let endNumber = document.getElementById('endValue').value; // "100"


    // turn the values into actual numbers

    fizzNumber = parseInt(fizzNumber); // 0
    buzzNumber = parseInt(buzzNumber); //0
    endNumber = parseInt(endNumber);  // 100

    if (Number(endNumber) > 5000) {
        Swal.fire({
            icon: 'error',
            title: 'Whoa!',
            text: 'That is a little too much Fizz.'
        });
    }
    else if (Number.isInteger(fizzNumber) && Number.isInteger(buzzNumber) && Number.isInteger(endNumber)) {
        // generate teh range of numbers
        let generatedNumbers = generateValues(endNumber);

        displayValues(fizzNumber, buzzNumber, generatedNumbers);

    } else {
        // Uh oh! Something is wrong!  
        Swal.fire({
            icon: 'error',
            title: 'Ooops!',
            text: 'Please enter valid numbers and ensure your start number is less than your end number'
        });
    };

}

//generate a list of all numbers between the start and end
function generateValues(end) {
    // create a variable that can hold a bunch of numbers
    let numbers = [];

    // put a number into that variable 
    // add one to that number, then add that to the variable.
    // keep adding one and putting it inot the variable until we get to the end number
    for (let n = 1; n <= end; n = n + 1) {

        numbers.push(n);
    }

    // return the array of numbers
    return numbers;

}

// display each of those numbers on the page
function displayValues(fizz, buzz, numbers) {

    let html = '';
    let className = '';


    // make a loop to get each number from the array
    for (let index = 0; index < numbers.length; index = index += 1) {

        let currentNumber = numbers[index];

        if (currentNumber % fizz == 0 && currentNumber % buzz == 0) {

            html += ` ${currentNumber} FizzBuzz !  `

        } else if (currentNumber % fizz == 0) {
            html += ` ${currentNumber}Fizz `;
        }
        else if (currentNumber % buzz == 0) {
            html += ` ${currentNumber}Buzz`;
        } 
        
        else (html += `${currentNumber}`);

        // html += `${currentNumber}`;
        html += `${currentNumber}`;

    }

    let tbody = document.getElementById('results');

    tbody.innerHTML = html;


}