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允许/禁止跳转到外部站点

默认允许从当前网页跳转到外部站点，点击按钮后开始拦截，7秒后自动隐藏(点击按钮后重置隐藏时间)，页面刷新后重置。可用于阅读漫画、小说时拦截跳转到广告

  1. // ==UserScript==
  2. // @name         允许/禁止跳转到外部站点
  3. // @namespace    https://greasyfork.org/zh-CN/users/1305708-ayours
  4. // @version      2.4
  5. // @description  默认允许从当前网页跳转到外部站点，点击按钮后开始拦截，7秒后自动隐藏(点击按钮后重置隐藏时间)，页面刷新后重置。可用于阅读漫画、小说时拦截跳转到广告
  6. // @author       AYour
  7. // @match        *://*/*
  8. // @grant        none
  9. // @run-at       document-idle
  10. // @license MIT
  11. // ==/UserScript==
  12.  
  13. (function() {
  14.     'use strict';
  15.  
  16.     let blockExternalLinks = false;
  17.     let button;
  18.     let hideButtonTimeout;
  19.     let confirmTimeout;
  20.  
  21.     function createButton() {
  22.         if (button) {
  23.             clearTimeout(hideButtonTimeout);
  24.             button.remove();
  25.         }
  26.         button = document.createElement('button');
  27.         button.id = 'block-external-links-btn';
  28.         button.style.position = 'fixed';
  29.         button.style.bottom = '50px';
  30.         button.style.right = '20px';
  31.         button.style.zIndex = '20000';
  32.         button.textContent = '允许外部链接';
  33.         document.body.appendChild(button);
  34.  
  35.         button.addEventListener('click', toggleBlockExternalLinks);
  36.  
  37.         hideButtonTimeout = setTimeout(hideButton, 7000);
  38.     }
  39.  
  40.     function toggleBlockExternalLinks() {
  41.         blockExternalLinks = !blockExternalLinks;
  42.         button.textContent = blockExternalLinks ? '禁止外部链接' : '允许外部链接';
  43.         clearTimeout(hideButtonTimeout);
  44.         hideButtonTimeout = setTimeout(hideButton, 7000);
  45.     }
  46.  
  47.     function hideButton() {
  48.         button.style.display = 'none';
  49.     }
  50.  
  51.     function initialize() {
  52.         createButton();
  53.         document.addEventListener('click', checkExternalLinks);
  54.     }
  55.  
  56.     function checkExternalLinks(event) {
  57.         var target = event.target;
  58.         while (target != null) {
  59.             if (target.tagName === 'A') {
  60.                 var url = new URL(target.href);
  61.                 var currentUrl = new URL(window.location.href);
  62.                 if (blockExternalLinks && url.origin !== currentUrl.origin) {
  63.                     event.preventDefault();
  64.                     // 自定义确认对话框
  65.                     customConfirm('您确定不跳转到外部链接吗？', function(result) {
  66.                         if (result) {
  67.                             clearTimeout(confirmTimeout);
  68.                         } else {
  69.                             blockExternalLinks = false;
  70.                             button.textContent = '允许外部链接';
  71.                         }
  72.                     });
  73.                     break;
  74.                 }
  75.             }
  76.             target = target.parentElement;
  77.         }
  78.     }
  79.  
  80.     // 自定义确认对话框
  81.     function customConfirm(message, callback) {
  82.         // 创建一个自定义对话框
  83.         const dialog = document.createElement('div');
  84.         dialog.style.position = 'fixed';
  85.         dialog.style.top = '50%';
  86.         dialog.style.left = '50%';
  87.         dialog.style.transform = 'translate(-50%, -50%)';
  88.         dialog.style.backgroundColor = 'white';
  89.         dialog.style.padding = '10px';
  90.         dialog.style.border = '1px solid #ccc';
  91.         dialog.textContent = message;
  92.  
  93.         const confirmButton = document.createElement('button');
  94.         confirmButton.textContent = '不跳转';
  95.         confirmButton.addEventListener('click', function() {
  96.             document.body.removeChild(dialog);
  97.             callback(true);
  98.         });
  99.  
  100.         const cancelButton = document.createElement('button');
  101.         cancelButton.textContent = '要跳转';
  102.         cancelButton.addEventListener('click', function() {
  103.             document.body.removeChild(dialog);
  104.             callback(false);
  105.         });
  106.  
  107.         dialog.appendChild(confirmButton);
  108.         dialog.appendChild(cancelButton);
  109.         document.body.appendChild(dialog);
  110.  
  111.         // 设置一个2秒的超时，如果用户不点击，则自动选择“不跳转”
  112.         confirmTimeout = setTimeout(function() {
  113.             document.body.removeChild(dialog);
  114.             callback(true);
  115.         }, 2000);
  116.     }
  117.  
  118.     window.addEventListener('beforeunload', function() {
  119.         blockExternalLinks = false;
  120.         if (button) {
  121.             button.remove();
  122.         }
  123.     });
  124.  
  125.     initialize();
  126. })();