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YouTube Channel Hover Popup

Display a hover popup with channel info on YouTube after dynamic content load, with immediate loading indicator

当前为 2024-05-07 提交的版本，查看 最新版本。

  1. // ==UserScript==
  2. // @name         YouTube Channel Hover Popup
  3. // @namespace    http://tampermonkey.net/
  4. // @version      0.6
  5. // @description  Display a hover popup with channel info on YouTube after dynamic content load, with immediate loading indicator
  6. // @author       @dmtri
  7. // @match        https://www.youtube.com/*
  8. // @grant        none
  9. // @license MIT
  10. // ==/UserScript==
  11.  
  12. (function() {
  13.     'use strict';
  14.  
  15.     const MAGIC_NUMBER = 2500;
  16.     const initTag = '.youtube-popup-desc-init';
  17.  
  18.     const createPopup = () => {
  19.         const popup = document.createElement('div');
  20.         popup.style.position = 'fixed';
  21.         popup.style.zIndex = '1000';
  22.         popup.style.width = '300px';
  23.         popup.style.background = 'white';
  24.         popup.style.border = '1px solid black';
  25.         popup.style.borderRadius = '8px';
  26.         popup.style.padding = '16px';
  27.         popup.style.boxShadow = '0 4px 6px rgba(0,0,0,0.1)';
  28.         popup.style.display = 'none';
  29.         popup.style.fontSize = '16px';
  30.         document.body.appendChild(popup);
  31.         return popup;
  32.     };
  33.  
  34.     const popup = createPopup(); // Initialize the popup
  35.  
  36.     const showLoadingPopup = (popup, x, y) => {
  37.         popup.innerHTML = '<strong>Loading...</strong>';
  38.         popup.style.left = `${x}px`;
  39.         popup.style.top = `${y}px`;
  40.         popup.style.display = 'block';
  41.     };
  42.  
  43.     const updatePopupContent = (popup, content) => {
  44.         popup.innerHTML = content;
  45.         // Close button
  46.         const closeButton = document.createElement('button');
  47.         closeButton.textContent = 'X';
  48.         closeButton.style.position = 'absolute';
  49.         closeButton.style.top = '5px';
  50.         closeButton.style.right = '10px';
  51.         closeButton.style.border = 'none';
  52.         closeButton.style.background = 'none';
  53.         closeButton.style.cursor = 'pointer';
  54.         closeButton.style.color = '#333';
  55.         closeButton.style.fontSize = '16px';
  56.         closeButton.style.fontWeight = 'bold';
  57.  
  58.         closeButton.onclick = () => {
  59.             popup.style.display = 'none';
  60.         };
  61.  
  62.         popup.appendChild(closeButton);
  63.     };
  64.  
  65.     const hidePopup = (popup) => {
  66.         popup.style.display = 'none';
  67.     };
  68.  
  69.     const fetchChannelInfo = async (url) => {
  70.         try {
  71.             const response = await fetch(url);
  72.             const html = await response.text();
  73.             const parser = new DOMParser();
  74.             const doc = parser.parseFromString(html, 'text/html');
  75.             const meta = doc.querySelector('meta[property="og:description"]');
  76.             const description = meta ? meta.getAttribute('content') : 'No description available.';
  77.             return `<strong>Description:</strong> ${description}<br><a href="${url}">View Channel</a>`;
  78.         } catch (error) {
  79.             return 'Failed to load description.';
  80.         }
  81.     };
  82.  
  83.     const init = () => {
  84.         document.querySelectorAll('.ytd-channel-name#text-container').forEach(channelElement => {
  85.             let popupTimeout;
  86.  
  87.             channelElement.addEventListener('mouseenter', async (e) => {
  88.                 clearTimeout(popupTimeout);
  89.                 popupTimeout = setTimeout(async () => {
  90.                     const url = channelElement.querySelector('a').href;
  91.                     showLoadingPopup(popup, e.clientX, e.clientY + 20);
  92.                     const content = await fetchChannelInfo(url);
  93.                     updatePopupContent(popup, content);
  94.                 }, 500); // Reduced the delay to show the loading message sooner
  95.             });
  96.  
  97.             channelElement.addEventListener('mouseleave', setTimeout(() => {
  98.                 clearTimeout(popupTimeout);
  99.                 hidePopup(popup);
  100.             }, 1000));
  101.  
  102.             channelElement.addEventListener('mousemove', (e) => {
  103.                 if (popup.style.display !== 'none') {
  104.                     popup.style.left = `${e.clientX}px`;
  105.                     popup.style.top = `${e.clientY + 20}px`;
  106.                 }
  107.             });
  108.         });
  109.     };
  110.     const tryInit = () => {
  111. 		if (!document.querySelector(initTag)) {
  112. 			setTimeout(() => {
  113. 				init();
  114. 				tryInit();
  115. 			}, MAGIC_NUMBER);
  116. 		}
  117. 	};
  118. 	tryInit();
  119. })();