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在每个页面添加一个小按钮，一键回到页面顶部/底部，高仿酷安的回到顶部按钮样式。
// ==UserScript==
// @name 仿酷安回到顶部/底部（增强版）
// @namespace https://viayoo.com/
// @version 3
// @description 在每个页面添加一个小按钮，一键回到页面顶部/底部，高仿酷安的回到顶部按钮样式。
// @author You
// @run-at document-start
// @match *
// @grant none
// ==/UserScript==
(function() {
'use strict';
function toTopLikeKuAn() {
var toTopBtn = document.createElement("div");
toTopBtn.id = "toTopBtn";
toTopBtn.setAttribute("style","font-size:25px !important;width:40px !important;height:40px !important;line-height:45px !important;text-align:center !important;background:url('data:image/png;base64,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') no-repeat center center !important;background-size:12px 12px !important;background-color:rgba(250,250,250,0.9) !important;box-shadow:0px 1px 1px rgba(0,0,0,0.4);color:#000 !important;position:fixed !important;bottom:20px !important;right:45% !important;z-index:99999999999999999 !important;border-radius:100% !important;display:none;");
document.body.appendChild(toTopBtn);
};
function isScrollToTop() {
var toTopTimer,mystartY,myendY;
var topTopBtn = document.getElementById('toTopBtn');
document.addEventListener('touchstart',function (e) {
if (toTopTimer) {
clearTimeout(toTopTimer);
};
mystartY = e.changedTouches[0].clientY;
});
document.addEventListener('touchmove',function (e) {
myendY = e.changedTouches[0].clientY;
var myY = myendY - mystartY;
if (myY > 0){
toTopBtn.style.opacity = "1";
toTopBtn.style.display = "block";
toTopBtn.style.transform = "rotateZ(0deg)";
toTopBtn.style.boxShadow = "0px 1px 1px rgba(0,0,0,0.4)";
toTopBtn.addEventListener('click',function () {
window.scrollTo(0,0);
this.style.display = "none";
toTopBtn.removeEventListener('click',this,false);
});
} else if (myY < 0) {
toTopBtn.style.opacity = "1";
toTopBtn.style.display = "block";
toTopBtn.style.transform = "rotateZ(180deg)";
toTopBtn.style.boxShadow = "0px -1px 1px rgba(0,0,0,0.4)";
toTopBtn.addEventListener('click',function () {
window.scrollTo(0,document.documentElement.scrollHeight);
this.style.display = "none";
toTopBtn.removeEventListener('click',this,false);
});
}else {
toTopBtn.style.display = "none";
};
});
document.addEventListener('touchend',function (e) {
toTopTimer = setTimeout(function () {
toTopBtn.style.transitionProperty="opacity,background-color";
toTopBtn.style.transitionDuration="500ms";
toTopBtn.style.transitionTimingFunction = "linear";
toTopBtn.style.opacity = "0";
toTopBtn.style.backgroundColor = "rgba(200,200,200,1)";
setTimeout(function() {
toTopBtn.style.display = "none";
toTopBtn.style.backgroundColor = "rgba(250,250,250,0.9)";
},500);
},2000);
});
};
if (!document.getElementById('toTopBtn')) {
toTopLikeKuAn();
isScrollToTop();
};
})()