//shorthand for selecting elements by id
                            let $ = function(id){
                                return document.getElementById(id);
                            }
                            
                            //get fizz buzz values from user
                            //Controller
                            function getValues(){
                                let fizzValue = $("fizzValue").value;
                                let buzzValue = $("buzzValue").value;
                            
                                //parse for numbers
                                fizzValue = parseInt(fizzValue);
                                buzzValue = parseInt(buzzValue);
                            
                                //validate numbers are ints
                                if(Number.isInteger(fizzValue) && Number.isInteger(buzzValue)){
                                    
                                    //call fizzBuzz and pass in user values, returns the array
                                    let fbArray = fizzBuzz(fizzValue, buzzValue);
                            
                                    //call displayResults, pass in the fbArray and write values to screen
                                    displayData(fbArray);
                                }
                                else{
                                    alert("You must enter integers.");
                                }
                            }
                            
                            //get numbers from 1 to 100 with a loop 
                            //determine multiples of each individual number
                            //determine multiples of both together
                            //logic
                            function fizzBuzz(fizzValue, buzzValue){
                                //init returnArray
                                let returnArray = [];
                            
                                //loop 0 to 100
                                for (let i = 1; i <= 100; i++) {
                            
                                    //check to see if divisable by both (3 & 5)
                                    if (i % fizzValue == 0 && i % buzzValue == 0) {     
                                        returnArray.push("FizzBuzz")
                                    } 
                                    //check if divisable by fizz value
                                    else if(i % fizzValue == 0){
                                        returnArray.push("Fizz")
                                    } 
                                    //check to see if divisable by buzz value (5)
                                    else if(i % buzzValue == 0){
                                        returnArray.push("Buzz")
                                    }
                                    else {
                                        returnArray.push(i);
                                    }
                                }
                                return returnArray;
                            }
                            
                            //display the data in table
                            //View
                            function displayData(fbArray){
                            
                                //get the table body element from the page
                                let tableBody = $("results");
                            
                                //get the template
                                let templateRow = $("fbTemplate");
                            
                                //clear table
                                tableBody.innerHTML = "";
                            
                                //loops over the array and creates tr for each item
                                for (let index = 0; index < fbArray.length; index += 5) {
                                    let tableRow = document.importNode(templateRow.content, true);
                            
                                    //select tds and put in an array
                                    let rowCols = tableRow.querySelectorAll("td");
                                    rowCols[0].classList.add(fbArray[index]);
                                    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);
                                }
                            }
                        
                    

The Code is structured in one function.

Hello World

Hello world is a function that displays an alert with a message of "hello world"