Hi @Don, I made a small personal tweak to the FKB pro theme to add a floating chat button in the bottom right for tablet and desktop, and in the bottom left on mobile, with the same effect as the create topic button. I think there might be a better way to do it in code, but this works 
Here is my component code: css
// 1. MAIN FLOATING BUTTON
.header-dropdown-toggle.chat-header-icon {
position: fixed !important;
bottom: 60px !important;
right: 20px !important;
z-index: 9999 !important;
/* Perfect dimensions (circle) */
width: 60px !important;
height: 60px !important;
min-width: 60px !important;
min-height: 60px !important;
border-radius: 50% !important;
/* Bright blue color and colored shadow */
background: #0084ff !important;
box-shadow: 0 4px 14px rgba(0, 132, 255, 0.4), 0 2px 4px rgba(0, 0, 0, 0.1) !important;
/* Margin cleanup */
display: flex !important;
align-items: center !important;
justify-content: center !important;
padding: 0 !important;
margin: 0 !important;
border: none !important;
/* Smooth transition */
transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275), opacity 0.3s ease, box-shadow 0.2s ease !important;
}
/* Specific position on Mobile (Screens <= 640px) */
@media (max-width: 640px) {
.header-dropdown-toggle.chat-header-icon {
bottom: 80px !important;
left: 20px !important; /* Change to right: 20px if you prefer to put it back on the right */
}
}
/* Hover effect (slight enlargement) */
.header-dropdown-toggle.chat-header-icon:hover {
transform: scale(1.08) !important;
box-shadow: 0 6px 20px rgba(0, 132, 255, 0.5), 0 4px 8px rgba(0, 0, 0, 0.15) !important;
}
/* 2. CLEANUP OF NATIVE DISCOURSE GRAY BACKGROUND */
.header-dropdown-toggle.chat-header-icon .icon,
.header-dropdown-toggle.chat-header-icon span:not(.badge-notification):not(.chat-badge):not([class*="unread"]):not([class*="count"]) {
background-color: transparent !important;
box-shadow: none !important;
border: none !important;
}
/* 3. PERFECT CENTERING OF THE ICON (The bubble) */
.header-dropdown-toggle.chat-header-icon .d-icon,
.header-dropdown-toggle.chat-header-icon svg {
position: absolute !important;
top: 50% !important;
left: 50% !important;
transform: translate(-50%, -50%) !important;
margin: 0 !important;
padding: 0 !important;
width: 32px !important;
height: 32px !important;
color: #ffffff !important;
filter: drop-shadow(0 2px 2px rgba(0, 0, 0, 0.1)) !important;
}
/* 4. NOTIFICATION BADGE (Green counter + Visible number) */
.header-dropdown-toggle.chat-header-icon .badge-notification,
.header-dropdown-toggle.chat-header-icon .chat-badge,
.header-dropdown-toggle.chat-header-icon .unread-notifications,
.header-dropdown-toggle.chat-header-icon [class*="badge"],
.d-header-icons .header-dropdown-toggle.chat-header-icon .badge-notification {
position: absolute !important;
top: -4px !important;
right: -4px !important;
left: auto !important;
margin: 0 !important;
z-index: 10 !important;
/* Forced green color */
background-color: #53A548 !important;
background: #53A548 !important;
color: #ffffff !important;
/* Forced typography to make the number visible */
font-size: 13px !important;
font-weight: bold !important;
line-height: 18px !important;
letter-spacing: normal !important;
text-indent: 0 !important;
/* Dimensions and shape */
padding: 0 6px !important;
min-width: 22px !important;
height: 22px !important;
border-radius: 50px !important;
border: 2px solid #ffffff !important;
box-sizing: border-box !important;
/* Centering of the number */
display: flex !important;
align-items: center !important;
justify-content: center !important;
white-space: nowrap !important;
overflow: visible !important;
/* Green Pulse Animation (linked to your keyframes) */
animation: badge-pulse 2s infinite !important;
}
/* Forces all child elements (if Discourse wraps the number in a span) to display */
.header-dropdown-toggle.chat-header-icon .badge-notification *,
.header-dropdown-toggle.chat-header-icon .chat-badge *,
.header-dropdown-toggle.chat-header-icon [class*="badge"] * {
color: #ffffff !important;
background: transparent !important;
display: inline-block !important;
visibility: visible !important;
opacity: 1 !important;
font-size: inherit !important;
}
/* 5. CORRECTED ANIMATIONS (Radar Effect & Bounce) */
/* 5.1 - The radar wave (pulse) around the red badge */
.header-dropdown-toggle.chat-header-icon .badge-notification,
.header-dropdown-toggle.chat-header-icon .chat-badge,
.header-dropdown-toggle.chat-header-icon .chat-channel-unread-indicator {
animation: badge-pulse 2s infinite !important;
transform-origin: center !important;
}
/* 5.2 - The bounce effect on the entire blue button when there is a message */
.header-dropdown-toggle.chat-header-icon:has(.badge-notification),
.header-dropdown-toggle.chat-header-icon:has(.chat-badge),
.header-dropdown-toggle.chat-header-icon:has(.chat-channel-unread-indicator) {
animation: chat-bounce 3s infinite !important;
}
/* --- KEYFRAMES DEFINITION (Do not modify) --- */
/* Definition of the wave: we only use box-shadow to avoid display bugs */
@keyframes badge-pulse {
0% {
box-shadow: 0 0 0 0 rgba(250, 62, 62, 0.8);
}
70% {
box-shadow: 0 0 0 10px rgba(250, 62, 62, 0);
}
100% {
box-shadow: 0 0 0 0 rgba(250, 62, 62, 0);
}
}
/* Definition of the bounce: the button jumps slightly every 3 seconds */
@keyframes chat-bounce {
0%, 20%, 50%, 80%, 100% {
transform: translateY(0);
}
40% {
transform: translateY(-6px);
}
60% {
transform: translateY(-3px);
}
}
/* 6. PULSATION IN THE CHANNEL LIST AND PRIVATE MESSAGES */
/* 6.1 - Allow overflow on list containers */
.chat-channel-row,
.chat-channel-list-item,
.chat-drawer-container .chat-channel-unread-indicator,
.chat-channel-row .chat-channel-unread-indicator {
overflow: visible !important;
}
/* 6.2 - Style and margins of the indicator dot */
.chat-channel-row .chat-channel-unread-indicator,
.chat-channel-row .badge-notification,
.chat-channel-row .unread-indicator,
.chat-drawer-container .chat-channel-unread-indicator,
.chat-full-page .chat-channel-unread-indicator,
.chat-channel-list-item .chat-channel-unread-indicator {
animation: list-dot-pulse 1.8s infinite !important;
border-radius: 50% !important;
position: relative !important;
overflow: visible !important;
margin: 0 6px !important; /* Space to not stick to the text and date */
}
/* 6.3 - Adjusted animation (more compact wave of max 6px) */
@keyframes list-dot-pulse {
0% {
box-shadow: 0 0 0 0 rgba(0, 132, 255, 0.7); /* Adapts to the color of the dot */
}
70% {
box-shadow: 0 0 0 6px rgba(0, 132, 255, 0); /* Reduced radius to stay within the line */
}
100% {
box-shadow: 0 0 0 0 rgba(0, 132, 255, 0);
}
}
and the JS:
import { apiInitializer } from "discourse/lib/api";
export default apiInitializer((api) => {
let lastScrollTop = 0;
let isHiddenByScroll = false;
// 1. Scroll handler (Active ONLY on mobile)
window.addEventListener("scroll", () => {
const isMobile = window.innerWidth <= 640;
const floatBtn = document.querySelector('.header-dropdown-toggle.chat-header-icon');
if (!floatBtn) return;
// If we are on a computer, we ensure the button remains always visible
if (!isMobile) {
if (isHiddenByScroll) {
floatBtn.style.setProperty('transform', 'translateY(0) scale(1)', 'important');
floatBtn.style.setProperty('opacity', '1', 'important');
isHiddenByScroll = false;
}
return;
}
const currentScrollTop = window.pageYOffset || document.documentElement.scrollTop;
// If we scroll down (and have passed 100px)
if (currentScrollTop > lastScrollTop && currentScrollTop > 100) {
if (!isHiddenByScroll) {
floatBtn.style.setProperty('transform', 'translateY(100px) scale(0.8)', 'important');
floatBtn.style.setProperty('opacity', '0', 'important');
isHiddenByScroll = true;
}
}
// If we scroll up
else if (currentScrollTop < lastScrollTop) {
if (isHiddenByScroll) {
floatBtn.style.setProperty('transform', 'translateY(0) scale(1)', 'important');
floatBtn.style.setProperty('opacity', '1', 'important');
isHiddenByScroll = false;
}
}
lastScrollTop = currentScrollTop <= 0 ? 0 : currentScrollTop;
}, { passive: true });
// 2. MutationObserver to handle base display
const observer = new MutationObserver(() => {
const chatOpen = document.querySelector('.chat-drawer, .d-chat-floating-panel, .chat-widget, .chat-panel, .chat-out-of-container, .chat-full-page');
const isChatRoute = window.location.pathname.startsWith('/chat');
const hasFullPageClass = document.body.classList.contains('has-full-page-chat');
const isMobile = window.innerWidth <= 640;
const isTopicRoute = window.location.pathname.includes('/t/') || document.body.classList.contains('archetype-regular');
const hideOnMobileTopic = isMobile && isTopicRoute;
const floatBtn = document.querySelector('.header-dropdown-toggle.chat-header-icon');
if (floatBtn) {
if (chatOpen || isChatRoute || hasFullPageClass || hideOnMobileTopic) {
floatBtn.style.setProperty('display', 'none', 'important');
} else {
floatBtn.style.setProperty('display', 'flex', 'important');
// Proper handling of mobile / desktop placement
if (isMobile) {
floatBtn.style.setProperty('left', '10px', 'important'); // Change the value if you want to offset it more
floatBtn.style.removeProperty('right');
} else {
floatBtn.style.setProperty('right', '20px', 'important');
floatBtn.style.removeProperty('left');
}
}
}
});
observer.observe(document.body, { childList: true, subtree: true, attributes: true });
});