Jump to Top/Bottom

为网页增加向页尾、页首的按钮
当前为 2023-05-12 提交的版本，查看最新版本。
换行
// ==UserScript==
// @name		        Jump to Top/Bottom
// @author		        11ze
// @description	        为网页增加向页尾、页首的按钮
// @version				0.0.6
// @icon			data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACAAAAAgBAMAAACBVGfHAAAALVBMVEUAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAD////BHg4sAAAADXRSTlMAK1RVW1x3f4CI+vv8UJ/ShgAAAAFiS0dEDm+9ME8AAABqSURBVCjPY2CgHuCYgCbQexNNwe29DagKjmijKOG448C0dwKKAgYGZCVABQwMyErYjoBIrQKEEgEQwchAb4BuLQfYYdpILoU4HcmluSDPXUcyg+1OADOyAqCSo9bX8QchQ+519GhooKK3APJHHdKCOOK5AAAAAElFTkSuQmCC
// @match     	    *
// @include   	    *
// @exclude     	https://mail.google.com/*
// @exclude     	http://dzh.mop.com/*
// @exclude     	http://www.douban.com/photos/*
// @grant			none
// @license MIT
// @namespace https://greasyfork.org/users/1076530
// ==/UserScript==

/* ************************ 页面效果 ************************ */

//const buttonColor = '241,148,138,0.500'; // 红色
const buttonColor = '247,220,111,0.667'; // 奶黄

const topImage =
  'iVBORw0KGgoAAAANSUhEUgAAACAAAAAgCAYAAABzenr0AAAABmJLR0QA/wD/AP+gvaeTAAAAe0lEQVRYhe2QOwqAMBAFB0/jXazEwutYehsrz+aviE3SCH4SdQV5A9sEsjMsCCGEuEcDtF/KnR/ziCCf/Tj/Zi4vgQIYMbrEVh4widiTm0ScyV+NuCp/JSJW/mhEqjwqIjtYMAALUANdQkAPVMDkdyWRp358eIcQQvyYFerfNk+Wc2XSAAAAAElFTkSuQmCC';
const downImage =
  'iVBORw0KGgoAAAANSUhEUgAAACAAAAAgCAYAAABzenr0AAAABmJLR0QA/wD/AP+gvaeTAAAAlUlEQVRYhe3QMRLBUBRA0YMxtmIvqajsRCk6W1FYhMKamIyZKCQzmoT8SBTerf979/5HEARB0M7ylztyFFj1kGe44dD0YNoyfMUcx8SIDCcsql1JbFHijk2HubXn9UrsUuWpEV+Vd40YRP5pxKDydxGjyJsiRpXX5JWweJHnY8lr6kv0+vmsR8AFE5yx77EnCILgz3kAzr4zPi4gwh0AAAAASUVORK5CYII=';

function createTopButton() {
  const cssText = `opacity:0.3;
                  -moz-transition-duration:0.2s;
                  -webkit-transition-duration:0.2s;
                  background:url("data:image/png;base64,${topImage}")
                  no-repeat scroll 50% 50% rgba(${buttonColor});
                  border-radius:5px 5px 5px 5px;cursor:pointer;
                  position:fixed;
                  bottom:50%;
                  width:40px;
                  height:40px;
                  right:0px;
                  z-index:9999`;
  createButton(cssText, function () {
    window.scrollTo(0, 0);

    let target = getTarget();
    if (!target) {
      target = getBottomTarget();
    }

    if (target) {
      target.scrollIntoView();
    }
  });
}
if (self == top) createTopButton();

function createBottomButton() {
  const cssText = `opacity:0.3;
                  -moz-transition-duration:0.2s;
                  -webkit-transition-duration:0.2s;
                  background:url("data:image/png;base64,${downImage}")
                  no-repeat scroll 50% 50% rgba(${buttonColor});
                  border-radius:5px 5px 5px 5px;
                  cursor:pointer;
                  position:fixed;
                  top:51%;
                  width:40px;
                  height:40px;
                  right:0px;
                  z-index:9999`;
  createButton(cssText, function () {
    window.scrollTo(0, document.body.scrollHeight);

    let target = getTarget();
    if (!target) {
      target = getBottomTarget();
    }

    if (target) {
      target.scrollIntoView({ block: 'end' });
    }
  });
}
if (self == top) createBottomButton();

function createButton(cssText, clickFn) {
  const button = document.createElement('span');
  button.style.cssText = cssText;
  button.addEventListener(
    'mouseover',
    function () {
      button.style.opacity = 0.8;
    },
    false
  );
  button.addEventListener(
    'mouseout',
    function () {
      button.style.opacity = 0.2;
    },
    false
  );
  button.addEventListener('click', clickFn, false);
  document.body.appendChild(button);
}

function getTarget() {
  // 极客时间文章页面 https://time.geekbang.org/column/article/
  const geek = document.getElementById('article-content-container');
  if (geek) {
    return geek;
  }

  // QQ 邮箱邮件详情 https://mail.qq.com/cgi-bin/frame_html
  const iframe = document.getElementById('mainFrame');
  if (iframe) {
    const iframeDocument = iframe.contentDocument || iframe.contentWindow.document;
    const mailText = iframeDocument.getElementById('qqmail_mailcontainer');
    if (mailText) {
      return mailText;
    }
  }

  // https://www.notion.so
  const notion = document.querySelector('.whenContentEditable');
  if (notion) {
    return notion;
  }

  // https://discord.com/channels
  const discord = document.querySelector("#app-mount > div.appAsidePanelWrapper-ev4hlp > div.notAppAsidePanel-3yzkgB > div.app-3xd6d0 > div > div.layers-OrUESM.layers-1YQhyW > div > div > div > div.content-1SgpWY > div.chat-2ZfjoI > div.content-1jQy2l > main > div.messagesWrapper-RpOMA3.group-spacing-16 > div > div")
  if (discord) {
    return discord;
  }
}

function getTopTarget() {
  // https://docs.qq.com/doc
  const qqDoc = document.querySelector('#zoomable-container');
  if (qqDoc) {
    return qqDoc;
  }
}

function getBottomTarget() {
  // https://docs.qq.com/doc
  const qqDoc = document.querySelector('#zoomable-container');
  if (qqDoc) {
    return qqDoc;
  }
}