Github返回顶部
// ==UserScript==
// @name Github一键返回顶部
// @namespace http://tampermonkey.net/
// @version 0.1
// @description Github返回顶部
// @author JIAHE
// @match https://github.com/*
// @grant none
// @license GPL-3.0 License
// @sandbox JavaScript
// @run-at document-end
// @icon data:image/png;base64,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
// ==/UserScript==
(function() {
'use strict';
let css=`
.back2top {
cursor: pointer;
bottom: 1vw;
position: fixed;
right: 1vw;
font-family: 'Open Sans', sans-serif;
padding: 0;
font-size: inherit;
color: inherit;
box-sizing: inherit;
backface-visibility: hidden;
-webkit-font-smoothing: antialiased;
text-decoration: none;
transition: all 0.35s;
transition-timing-function: cubic-bezier(0.31, -0.105, 0.43, 1.59);
display: inline-block;
background-color: #fff;
width: 50px;
height: 50px;
line-height: 50px;
margin: 0 10px;
text-align: center;
overflow: hidden;
border-radius: 28%;
box-shadow: 0 5px 15px -5px rgba(0,0,0,0.45);
opacity: 0.99;
background-position: center;
background-image: url('data:image/png;base64,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');
background-repeat: no-repeat;
background-size: 50%;
}
.back2top:hover {
background-color: var(--bgColor-muted);
}
`;
document.getElementsByTagName('style')[0].textContent+=document.getElementsByTagName('style')[0].textContent+css; // 第一个style内容
let body = document.querySelector('body');
let a=document.createElement('i');
a.className='back2top';
a.style.display='none'
body.appendChild(a);
let now =document.documentElement.scrollTop||document.body.scrollTop;
if(now>window.innerHeight){
a.style.display='block';
}
a.onclick=function(){
window.scrollTo({
top: 0,
behavior: 'smooth',
});
return false;
}
window.onscroll=function(){
let t =document.documentElement.scrollTop||document.body.scrollTop;
if(t > window.innerHeight){
//滚动到完一页后显示回到顶部
a.style.display='block';
}else{
a.style.display='none';
}
}
})();