Linux.do一键滚动到底部和顶部（支持懒加载和拖拽）
// ==UserScript==
// @name Linux.do一键滚动到底部和顶部（支持懒加载和拖拽）
// @namespace http://tampermonkey.net/
// @version 0.4
// @description 实现网页滚动到底部、顶部，处理懒加载内容，支持按钮拖拽
// @match https://linux.do/*
// @grant none
// ==/UserScript==
(function() {
'use strict';
// 创建控制按钮
function createButton(text, onClick, top) {
const button = document.createElement('button');
button.textContent = text;
button.style.cssText = `
position: fixed;
right: 20px;
top: ${top}px;
padding: 10px;
z-index: 9999;
background-color: #4CAF50;
color: white;
border: none;
border-radius: 5px;
cursor: move;
opacity: 0.7;
transition: opacity 0.3s;
`;
button.addEventListener('mouseover', () => button.style.opacity = '1');
button.addEventListener('mouseout', () => button.style.opacity = '0.7');
button.addEventListener('click', onClick);
makeDraggable(button);
return button;
}
// 使元素可拖拽
function makeDraggable(element) {
let pos1 = 0, pos2 = 0, pos3 = 0, pos4 = 0;
element.onmousedown = dragMouseDown;
function dragMouseDown(e) {
e = e || window.event;
e.preventDefault();
pos3 = e.clientX;
pos4 = e.clientY;
document.onmouseup = closeDragElement;
document.onmousemove = elementDrag;
}
function elementDrag(e) {
e = e || window.event;
e.preventDefault();
pos1 = pos3 - e.clientX;
pos2 = pos4 - e.clientY;
pos3 = e.clientX;
pos4 = e.clientY;
element.style.top = (element.offsetTop - pos2) + "px";
element.style.right = (parseInt(element.style.right) + pos1) + "px";
}
function closeDragElement() {
document.onmouseup = null;
document.onmousemove = null;
}
}
// 滚动函数（通用于顶部和底部）
function smoothScroll(toTop) {
return new Promise((resolve) => {
let lastScrollHeight = document.documentElement.scrollHeight;
let scrollAttempts = 0;
const maxScrollAttempts = 50; // 最大滚动尝试次数
function scroll() {
if (toTop) {
window.scrollTo(0, 0);
} else {
window.scrollTo(0, document.documentElement.scrollHeight);
}
scrollAttempts++;
setTimeout(() => {
const currentScrollHeight = document.documentElement.scrollHeight;
if (currentScrollHeight !== lastScrollHeight && scrollAttempts < maxScrollAttempts) {
lastScrollHeight = currentScrollHeight;
scroll();
} else {
resolve();
}
}, 300); // 等待0.3秒，给懒加载内容时间加载
}
scroll();
});
}
// 创建并添加按钮
const scrollTopButton = createButton('⬆️ 顶部', () => smoothScroll(true), 20);
document.body.appendChild(scrollTopButton);
const scrollBottomButton = createButton('⬇️ 底部', () => smoothScroll(false), 70);
document.body.appendChild(scrollBottomButton);
})();