Adds sleek top and bottom navigation buttons with hover scrolling functionality for all websites
// ==UserScript==
// @name Top/Bottom Navigation Buttons
// @namespace https://openuserjs.org/
// @version 1.0.0
// @description Adds sleek top and bottom navigation buttons with hover scrolling functionality for all websites
// @author r3dhack3r
// @license MIT
// @match *://*/*
// @grant none
// ==/UserScript==
(function() {
'use strict';
// Create CSS styles
const style = document.createElement('style');
style.textContent = `
.nav-button {
position: fixed;
right: 20px;
top: 50%;
width: 36px;
height: 36px;
background: rgba(255, 255, 255, 0.95);
border: 1px solid rgba(0, 0, 0, 0.1);
border-radius: 6px;
cursor: pointer;
z-index: 10000;
box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
display: flex;
align-items: center;
justify-content: center;
backdrop-filter: blur(8px);
}
.nav-button:hover {
background: rgba(255, 255, 255, 1);
border-color: rgba(0, 0, 0, 0.15);
box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
transform: scale(1.05);
}
.nav-button:active {
transform: scale(0.95);
transition: all 0.1s ease;
}
.nav-button svg {
width: 16px;
height: 16px;
fill: #374151;
transition: all 0.25s ease;
}
.nav-button:hover svg {
fill: #1f2937;
}
.nav-button.top {
transform: translateY(-24px);
opacity: 0;
visibility: hidden;
}
.nav-button.bottom {
transform: translateY(24px);
opacity: 0;
visibility: hidden;
}
.nav-button.visible {
opacity: 1;
visibility: visible;
}
.nav-button.scrolling {
background: rgba(249, 250, 251, 1);
border-color: rgba(0, 0, 0, 0.2);
box-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
}
`;
document.head.appendChild(style);
// Create top button
const topButton = document.createElement('button');
topButton.className = 'nav-button top';
topButton.innerHTML = `
<svg viewBox="0 0 24 24">
<path d="M7.41 15.41L12 10.83l4.59 4.58L18 14l-6-6-6 6z"/>
</svg>
`;
// Create bottom button
const bottomButton = document.createElement('button');
bottomButton.className = 'nav-button bottom';
bottomButton.innerHTML = `
<svg viewBox="0 0 24 24">
<path d="M7.41 8.59L12 13.17l4.59-4.58L18 10l-6 6-6-6 1.41-1.41z"/>
</svg>
`;
// Add buttons to page
document.body.appendChild(topButton);
document.body.appendChild(bottomButton);
// Scroll variables
let scrollInterval;
let isScrolling = false;
// Smooth scroll function
function smoothScroll(targetY, duration = 800) {
const startY = window.pageYOffset;
const distance = targetY - startY;
const startTime = performance.now();
function easeInOutCubic(t) {
return t < 0.5 ? 4 * t * t * t : (t - 1) * (2 * t - 2) * (2 * t - 2) + 1;
}
function step(currentTime) {
const elapsed = currentTime - startTime;
const progress = Math.min(elapsed / duration, 1);
const easedProgress = easeInOutCubic(progress);
window.scrollTo(0, startY + distance * easedProgress);
if (progress < 1) {
requestAnimationFrame(step);
}
}
requestAnimationFrame(step);
}
// Continuous scroll function
function startContinuousScroll(direction) {
if (isScrolling) return;
isScrolling = true;
const button = direction === 'up' ? topButton : bottomButton;
button.classList.add('scrolling');
scrollInterval = setInterval(() => {
const scrollAmount = direction === 'up' ? -15 : 15;
window.scrollBy(0, scrollAmount);
// Stop if reached limits
if (direction === 'up' && window.pageYOffset <= 0) {
stopContinuousScroll();
} else if (direction === 'down') {
const documentHeight = Math.max(
document.body.scrollHeight,
document.body.offsetHeight,
document.documentElement.clientHeight,
document.documentElement.scrollHeight,
document.documentElement.offsetHeight
);
if ((window.innerHeight + window.pageYOffset) >= documentHeight - 10) {
stopContinuousScroll();
}
}
}, 20);
}
function stopContinuousScroll() {
if (scrollInterval) {
clearInterval(scrollInterval);
scrollInterval = null;
}
isScrolling = false;
topButton.classList.remove('scrolling');
bottomButton.classList.remove('scrolling');
}
// Button event listeners
topButton.addEventListener('click', (e) => {
e.preventDefault();
smoothScroll(0);
});
bottomButton.addEventListener('click', (e) => {
e.preventDefault();
const documentHeight = Math.max(
document.body.scrollHeight,
document.body.offsetHeight,
document.documentElement.clientHeight,
document.documentElement.scrollHeight,
document.documentElement.offsetHeight
);
smoothScroll(documentHeight - window.innerHeight);
});
// Hover events for continuous scrolling
topButton.addEventListener('mouseenter', () => {
setTimeout(() => {
if (topButton.matches(':hover')) {
startContinuousScroll('up');
}
}, 500); // Delay before starting continuous scroll
});
topButton.addEventListener('mouseleave', stopContinuousScroll);
bottomButton.addEventListener('mouseenter', () => {
setTimeout(() => {
if (bottomButton.matches(':hover')) {
startContinuousScroll('down');
}
}, 500); // Delay before starting continuous scroll
});
bottomButton.addEventListener('mouseleave', stopContinuousScroll);
// Show/hide buttons based on scroll position
function updateButtonVisibility() {
const scrollTop = window.pageYOffset;
const documentHeight = Math.max(
document.body.scrollHeight,
document.body.offsetHeight,
document.documentElement.clientHeight,
document.documentElement.scrollHeight,
document.documentElement.offsetHeight
);
const windowHeight = window.innerHeight;
// Show top button if scrolled down
if (scrollTop > 200) {
topButton.classList.add('visible');
} else {
topButton.classList.remove('visible');
}
// Show bottom button if not at bottom
if (scrollTop + windowHeight + 100 < documentHeight) {
bottomButton.classList.add('visible');
} else {
bottomButton.classList.remove('visible');
}
}
// Throttled scroll listener
let scrollTimeout;
window.addEventListener('scroll', () => {
if (scrollTimeout) {
clearTimeout(scrollTimeout);
}
scrollTimeout = setTimeout(updateButtonVisibility, 10);
});
// Initial visibility check
setTimeout(updateButtonVisibility, 100);
// Keyboard shortcuts (optional)
document.addEventListener('keydown', (e) => {
if (e.ctrlKey || e.metaKey) {
if (e.key === 'Home') {
e.preventDefault();
smoothScroll(0);
} else if (e.key === 'End') {
e.preventDefault();
smoothScroll(document.body.scrollHeight - window.innerHeight);
}
}
});
})();