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Youtube channel description popup on hover

Cool stuffs!

当前为 2023-09-08 提交的版本，查看 最新版本。

  1. // ==UserScript==
  2. // @name         Youtube channel description popup on hover
  3. // @namespace    http://tampermonkey.net/
  4. // @version      0.1
  5. // @description  Cool stuffs!
  6. // @author       Duc Trinh @dmtri
  7. // @match        https://www.youtube.com/*
  8. // @icon
  9. // @grant        none
  10. // @license MIT
  11. // ==/UserScript==
  12.  
  13. (function () {
  14. 	'use strict';
  15. 	const initTag = '.youtube-popup-desc-init';
  16.  
  17. 	// a tampermonkey script to get the profile details
  18. 	// upon hover a channel profile on youtube (after 1.5 sec)
  19. 	// and then display the channel desc in a popup
  20.  
  21. 	const profileIdentifierUrlContainer = '#container.ytd-channel-name';
  22.  
  23. 	// get the url from element with profileIdentifier
  24. 	const getProfileUrl = (profileMetaDataElement) => {
  25. 		const anchor = profileMetaDataElement.getElementsByTagName('a')[0];
  26. 		return anchor.href;
  27. 	};
  28.  
  29. 	const wait = (ms) => new Promise((resolve) => setTimeout(resolve, ms));
  30.  
  31. 	// display a popup when hover over the profileMetaData element
  32. 	const init = (force = false) => {
  33. 		if (!force && document.querySelector(initTag)) {
  34. 			return;
  35. 		}
  36.  
  37. 		const profileMetaDataElement = document.querySelectorAll(profileIdentifierUrlContainer);
  38. 		if (!profileMetaDataElement || !profileMetaDataElement.length) {
  39. 			return;
  40. 		}
  41. 		profileMetaDataElement.forEach((element) => {
  42. 			element.addEventListener('mouseenter', async () => {
  43. 				let isValidGesture = true;
  44.  
  45. 				const mouseLeaveHandler = () => {
  46. 					isValidGesture = false;
  47. 				};
  48. 				element.removeEventListener('mouseleave', mouseLeaveHandler);
  49. 				element.addEventListener('mouseleave', mouseLeaveHandler);
  50.  
  51. 				await wait(1500);
  52. 				// valid gesture meaning a mouse enter event
  53. 				// is not followed by a mouse leave event
  54. 				// within 1.5 seconds
  55. 				handler(element, isValidGesture);
  56. 			});
  57. 		});
  58.  
  59. 		// append init tag to document
  60. 		const initTagElement = document.createElement('div');
  61. 		initTagElement.classList.add(initTag.replace('.', ''));
  62. 		document.body.appendChild(initTagElement);
  63.  
  64. 		// try init when popstate event happen
  65. 		window.addEventListener('popstate', () => {
  66. 			tryInit(true);
  67. 		});
  68. 	};
  69.  
  70. 	const handler = async (profileMetaDataElement, isValidGesture) => {
  71. 		if (!isValidGesture) return;
  72.  
  73. 		// display a native dialog element
  74. 		const dialog = document.createElement('dialog');
  75. 		const url = getProfileUrl(profileMetaDataElement);
  76.  
  77. 		let desc = '';
  78.  
  79. 		// append a spinner next to a channel name, then close it after 3 sec
  80. 		const spinner = document.createElement('div');
  81. 		spinner.innerHTML = 'loading...';
  82. 		profileMetaDataElement.appendChild(spinner);
  83. 		setTimeout(() => {
  84. 			spinner.remove();
  85. 		}, 3000);
  86.  
  87. 		await fetch(url)
  88. 			.then((response) => response.text())
  89. 			.then((html) => {
  90. 				// <meta property="og:description" content="This is a place for all the things that are awesome on stream. ">
  91. 				const parser = new DOMParser();
  92. 				const doc = parser.parseFromString(html, 'text/html');
  93. 				const meta = doc.querySelector('meta[property="og:description"]');
  94.  
  95. 				desc = !meta ? (desc = 'No desc available') : meta.getAttribute('content');
  96. 			});
  97.  
  98. 		dialog.innerHTML = `
  99.     <div>
  100.       <h2>${desc}</h2>
  101.       <h1>
  102.         <a href="${url}">${url}</h1>
  103.       </h1>
  104.     </div>
  105.   `;
  106. 		document.body.appendChild(dialog);
  107. 		dialog.showModal();
  108.  
  109. 		setTimeout(() => {
  110. 			dialog.close();
  111. 		}, 3000);
  112. 	};
  113.  
  114. 	// while there is no init tag in the document, keep trying to init
  115. 	const tryInit = (force = false) => {
  116. 		if (!document.querySelector(initTag)) {
  117. 			setTimeout(() => {
  118. 				init(force);
  119. 				tryInit(force);
  120. 			}, 1500);
  121. 		}
  122. 	};
  123. 	tryInit();
  124. })();