☰

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。

  1. // ==UserScript==
  2. // @name		        Jump to Top/Bottom
  3. // @author		        11ze
  4. // @description	        为网页增加向页尾、页首的按钮
  5. // @version				0.0.9
  6. // @icon			data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACAAAAAgBAMAAACBVGfHAAAALVBMVEUAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAD////BHg4sAAAADXRSTlMAK1RVW1x3f4CI+vv8UJ/ShgAAAAFiS0dEDm+9ME8AAABqSURBVCjPY2CgHuCYgCbQexNNwe29DagKjmijKOG448C0dwKKAgYGZCVABQwMyErYjoBIrQKEEgEQwchAb4BuLQfYYdpILoU4HcmluSDPXUcyg+1OADOyAqCSo9bX8QchQ+519GhooKK3APJHHdKCOOK5AAAAAElFTkSuQmCC
  7. // @match     	    *
  8. // @include   	    *
  9. // @grant			none
  10. // @license MIT
  11. // @namespace https://greasyfork.org/users/1076530
  12. // ==/UserScript==
  13.  
  14. /* ************************ 页面效果 ************************ */
  15.  
  16. //const buttonColor = '241,148,138,0.500'; // 红色
  17. const buttonColor = '247,220,111,0.667'; // 奶黄
  18.  
  19. const topImage =
  20.   'iVBORw0KGgoAAAANSUhEUgAAACAAAAAgCAYAAABzenr0AAAABmJLR0QA/wD/AP+gvaeTAAAAe0lEQVRYhe2QOwqAMBAFB0/jXazEwutYehsrz+aviE3SCH4SdQV5A9sEsjMsCCGEuEcDtF/KnR/ziCCf/Tj/Zi4vgQIYMbrEVh4widiTm0ScyV+NuCp/JSJW/mhEqjwqIjtYMAALUANdQkAPVMDkdyWRp358eIcQQvyYFerfNk+Wc2XSAAAAAElFTkSuQmCC';
  21. const downImage =
  22.   'iVBORw0KGgoAAAANSUhEUgAAACAAAAAgCAYAAABzenr0AAAABmJLR0QA/wD/AP+gvaeTAAAAlUlEQVRYhe3QMRLBUBRA0YMxtmIvqajsRCk6W1FYhMKamIyZKCQzmoT8SBTerf979/5HEARB0M7ylztyFFj1kGe44dD0YNoyfMUcx8SIDCcsql1JbFHijk2HubXn9UrsUuWpEV+Vd40YRP5pxKDydxGjyJsiRpXX5JWweJHnY8lr6kv0+vmsR8AFE5yx77EnCILgz3kAzr4zPi4gwh0AAAAASUVORK5CYII=';
  23.  
  24. const sameCssText = `opacity:0.3;
  25.                 -moz-transition-duration:0.2s;
  26.                 -webkit-transition-duration:0.2s;
  27.                 border-radius:5px 5px 5px 5px;
  28.                 cursor:pointer;
  29.                 position:fixed;
  30.                 width:40px;
  31.                 height:40px;
  32.                 right:0px;
  33.                 z-index:9999;`;
  34.  
  35. function createTopButton() {
  36.   const cssText = `${sameCssText}
  37.                   no-repeat scroll 50% 50% rgba(${buttonColor});
  38.                   background:url("data:image/png;base64,${topImage}")
  39.                   bottom:50%`;
  40.   createButton(cssText, true);
  41. }
  42. if (self == top) createTopButton();
  43.  
  44. function createBottomButton() {
  45.   const cssText = `${sameCssText}
  46.                   no-repeat scroll 50% 50% rgba(${buttonColor});
  47.                   background:url("data:image/png;base64,${downImage}")
  48.                   top:51%`;
  49.   createButton(cssText, false);
  50. }
  51. if (self == top) createBottomButton();
  52.  
  53. function createButton(cssText, isTop) {
  54.   const button = document.createElement('span');
  55.   button.style.cssText = cssText;
  56.   button.addEventListener(
  57.     'mouseover',
  58.     function () {
  59.       button.style.opacity = 0.8;
  60.     },
  61.     false
  62.   );
  63.   button.addEventListener(
  64.     'mouseout',
  65.     function () {
  66.       button.style.opacity = 0.2;
  67.     },
  68.     false
  69.   );
  70.   button.addEventListener(
  71.     'click',
  72.     function () {
  73.       if (window.scrollHeight) {
  74.         window.scrollTo(0, isTop ? 0 : document.body.scrollHeight);
  75.         return;
  76.       }
  77.  
  78.       const target = getTarget();
  79.       if (target) {
  80.         target.scrollIntoView({ block: isTop ? 'start' : 'end' });
  81.         return;
  82.       }
  83.  
  84.       runScrollableElements(isTop);
  85.     },
  86.     false
  87.   );
  88.   document.body.appendChild(button);
  89. }
  90.  
  91. function getTarget() {
  92.   // QQ 邮箱邮件详情 https://mail.qq.com/cgi-bin/frame_html
  93.   const iframe = document.getElementById('mainFrame');
  94.   if (iframe) {
  95.     const iframeDocument = iframe.contentDocument || iframe.contentWindow.document;
  96.     const mailText = iframeDocument.getElementById('qqmail_mailcontainer');
  97.     if (mailText) {
  98.       return mailText;
  99.     }
  100.   }
  101. }
  102.  
  103. function runScrollableElements(isTop) {
  104.   const elements = document.querySelectorAll('*');
  105.   for (const e of elements) {
  106.     if (
  107.       e.scrollHeight > e.clientHeight &&
  108.       e.scrollHeight > 300 &&
  109.       e.scrollWidth > 300 &&
  110.       !e.innerHTML.includes('<html')
  111.     ) {
  112.       if (isTop) {
  113.         e.scrollTo(0, 0);
  114.       } else {
  115.         e.scrollTo(0, e.scrollHeight);
  116.       }
  117.     }
  118.   }
  119. }