//get values from the page for start and ending inputs
  const getValues = () => {
    let fizzValue = document.getElementById('fizzValue').value;
    let buzzValue = document.getElementById('buzzValue').value;
  
    //input validation, parse into integers
    fizzValue = parseInt(fizzValue);
    buzzValue = parseInt(buzzValue);
  
    //integer check:
    if (Number.isInteger(fizzValue) && Number.isInteger(buzzValue)) {
      //generateNumbers, or fizzBuzz
      let fbArray = fizzBuzz(fizzValue, buzzValue);
  
      displayData(fbArray);
    } else {
      alert('You must enter integers');
    }
  };
  
  const fizzBuzz = (fizzValue, buzzValue) => {
    let returnArray = [];
    for (let i = 1; i <= 100; i++) {
      let value =
        (i % fizzValue === 0 ? 'Fizz' : '') +
          (i % buzzValue === 0 ? 'Buzz' : '') || i;
      returnArray.push(value);
    }
    return returnArray;
  };
  //empty string '' evaluates to false
  
  //loop over the array and create a tablerow for each item.
  const displayData = (fbArray) => {
    let tableBody = document.getElementById('results');
  
    //get the template row
    let templateRow = document.getElementById('fbTemplate');
  
    //clear the table
    tableBody.innerHTML = '';
  
    for (let index = 0; index < fbArray.length; index += 5) {
      let tableRow = document.importNode(templateRow.content, true);
  
      //grab the td's to put into the array
      let rowCols = tableRow.querySelectorAll('td');
  
      //add css styling with classList.add
      rowCols[0].classList.add(fbArray[index]);
      //column 1 on the table, etc...
      rowCols[0].textContent = fbArray[index];
  
      rowCols[1].classList.add(fbArray[index + 1]);
      rowCols[1].textContent = fbArray[index + 1];
  
      rowCols[2].classList.add(fbArray[index + 2]);
      rowCols[2].textContent = fbArray[index + 2];
  
      rowCols[3].classList.add(fbArray[index + 3]);
      rowCols[3].textContent = fbArray[index + 3];
  
      rowCols[4].classList.add(fbArray[index + 4]);
      rowCols[4].textContent = fbArray[index + 4];
  
      tableBody.appendChild(tableRow);
    }
  };
              
                
            

Hello World!