I am currently constructing a roulette system programme ( this is more to keep me from betting than to bet! ) and am just doing the basic framework but already hit a problem with the main window '#results' not scrolling when it is filled with the results. The scroll needs to follow the latest line of content so the latest returned from the input in the modal box is always showing at the bottom. I have spent hours on lots of possible solutions to no avail.
Here is the code: ( i apologise for the length of the full script )
<!DOCTYPE html>
<html>
<body>
<div id="results">
</div>
<div id="modal">
<div id="modal-content">
<p>Select a number between 0 and 36:</p>
<div id="numberButtons"></div>
<button id="close-button" onclick="closeModal()">Close</button>
</div>
</div>
</div>
<style>
/* The modal background */
#modal {
position: fixed;
z-index: 1;
left: 0;
top: 0;
width: 100%;
height: 100%;
overflow: auto;
background-color: rgba(0, 0, 0, 0.5);
}
/* The modal content */
#modal-content {
position: absolute;
left: 50%;
top: 50%;
transform: translate(-50%, -50%);
background-color: #fefefe;
padding: 20px;
width: 18%;
border: 3px solid black;
}
/* The close button */
#close-button {
display: block;
margin: 0 auto;
}
#numberButtons button {
color: white;
width: 50px;
height: 50px;
font-size:30px;
font-weight:600;
}
#modal.inactive{
opacity: 0.2;
}
</style>
<script>
var bankRoll = parseFloat(prompt("Please enter your starting bankroll:"));
if(isNaN(bankRoll)){
bankRoll = parseFloat(prompt("Invalid input. Please enter a valid number for your starting bankroll:"));
}
bankRoll = bankRoll.toFixed(2);
var spinNumber=0;
var backline="";
var isDragging = false;
var currentX;
var currentY;
var initialX;
var initialY;
var xOffset = 0;
var yOffset = 0;
const modalContent = document.querySelector("#modal-content");
modalContent.addEventListener("mousedown", dragStart);
modalContent.addEventListener("mouseup", dragEnd);
modalContent.addEventListener("mousemove", drag);
function dragStart(e) {
initialX = e.clientX - xOffset;
initialY = e.clientY - yOffset;
if (e.target === modalContent) {
isDragging = true;
}
}
let inactivityTimeout;
function dragEnd(e) {
initialX = currentX;
initialY = currentY;
isDragging = false;
clearTimeout(inactivityTimeout);
inactivityTimeout = setTimeout(() => {
modal.classList.add("inactive")
}, 15000)
}
function drag(e) {
if (e.buttons === 1) {
e.preventDefault();
currentX = e.clientX - initialX;
currentY = e.clientY - initialY;
xOffset = currentX;
yOffset = currentY;
setTranslate(currentX, currentY, modalContent);
clearTimeout(inactivityTimeout);
modal.classList.remove("inactive")
}
}
function setTranslate(xPos, yPos, el) {
el.style.transform = "translate3d(" + xPos + "px, " + yPos + "px, 0)";
}
function getNumberType(number) {
if (number === 0) {
return "green";
} else if (number % 2 === 0) {
return "even";
} else {
return "odd";
}
}
function roulette(number) {
// Determine the color of the number
var color;
if (number === 0) {
color = "Green";
} else if (number === 1 || number === 3 || number === 5 || number === 7 || number === 9 || number === 12 || number === 14 || number === 16 || number === 18 || number === 19 || number === 21 || number === 23 || number === 25 || number === 27 || number === 30 || number === 32 || number === 34 || number === 36) {
color = "Red";
} else {
color = "Black";
}
// Map the color names to CSS color values
if (color === "Green") {
return "rgb(0, 128, 0)";
} else if (color === "Red") {
return "rgb(255, 0, 0)";
} else {
return "rgb(0, 0, 0)";
}
}
function backgroundline() {
if (spinNumber % 2 === 0) {
backline="#D3D3D3"
} else {
backline="#E5E4E2";
}
}
function spin(number) {
// Determine the color of the number
var color = roulette(number);
spinNumber= spinNumber+1;
bankRoll=bankRoll-10;
backgroundline();
// Display the result
var resultsDiv = document.getElementById("results");
var resultHTML = `${number}`;
resultHTML = `<div style="padding:10px 0; background: ${backline};vertical-align:middle;margin-bottom:- 20px;">
<div style="padding:5px; display: inline-block; background: yellow; color:black;vertical-align:middle; width:30px; text-align:right;">${spinNumber}</div>
<div style="margin: 0 10px; display:inline-block; width: 70px; text-align:center;vertical-align:middle">£ ${bankRoll}</div>
<div style="color: white; padding: 5px; display: inline-block; width:30px; padding-top:15px;vertical-align:middle; font-size: 25px; font-weight:600; height:30px; text-align:center; background-color: ${color}; ">${resultHTML}</div>
</div>
<br style="height:0px;"/>`;
resultsDiv.innerHTML += resultHTML;
}
// Set up the buttons
for (let i = 0; i <= 36; i++) {
let button = document.createElement("button");
button.innerHTML = i;
button.style.backgroundColor = roulette(i);
button.addEventListener("click", function() {
spin(i);
});
document.getElementById("numberButtons").appendChild(button);
}
function closeModal() {
// Get the modal element
var modal = document.getElementById("modal");
// Remove the modal element from the DOM
modal.remove();
}
</script>
</body>
</html>
I have tried lots of solutions on Stack Overflow and across the Internet further field that I thought might work but it just doesn't seem to want to do it.
after adding element in Results div you have to call this function.
add this function window.scrollTo(0, document.body.scrollHeight) after this line resultsDiv.innerHTML += resultHTML;