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Block reddit click tracking

Stops reddit from tracking your inbound and outbound clicks

当前为 2018-04-29 提交的版本，查看 最新版本。

  1. // ==UserScript==
  2. // @name        Block reddit click tracking
  3. // @namespace   mjhcfwlmjfzg778evppa995xavvt2nmb
  4. // @description Stops reddit from tracking your inbound and outbound clicks
  5. // @match       *://*.reddit.com/*
  6. // @version     1.2
  7. // @grant       unsafeWindow
  8. // @run-at      document-start
  9. // ==/UserScript==
  10.  
  11. (function () {
  12. 	"use strict";
  13.  
  14. 	const expiredDate = Date.now().toString();
  15. 	const targetLink = Symbol();
  16.  
  17.  
  18. 	// Capturing event listener on the outermost element.
  19. 	// Runs FIRST, before any others.
  20. 	const beforeClick = function (event) {
  21. 		let target = event.target;
  22.  
  23. 		// Did we click on an element?
  24. 		if (target.nodeType === 1) {
  25. 			//  Is that element inside a link?
  26. 			target = target.closest("a");
  27.  
  28. 			if (target) {
  29. 				// Stash link in the event object so that
  30. 				// the second handler doesn't have to dig
  31. 				// through the DOM with .closest() again
  32. 				event[targetLink] = target;
  33.  
  34. 				if (target.dataset.hrefUrl) {
  35. 					// Remove link tracking attributes
  36. 					delete target.dataset.inboundUrl;
  37. 					delete target.dataset.outboundUrl;
  38.  
  39. 					// Mark outbound link as expired so reddit code
  40. 					// does not try to use it
  41. 					if (target.dataset.outboundExpiration) {
  42. 						target.dataset.outboundExpiration = expiredDate;
  43. 					}
  44. 				}
  45. 			}
  46. 		}
  47. 	};
  48.  
  49.  
  50. 	// Bubbling event listener on the outermost element.
  51. 	// Runs LAST, just before the click goes through
  52. 	// (unless reddit code adds any others afterwards)
  53. 	const justBeforeClick = function (event) {
  54. 		const target = event[targetLink];
  55.  
  56. 		// If reddit event handlers modified the link, change it back
  57. 		if (target && target.dataset.hrefUrl) {
  58. 			target.href = target.dataset.hrefUrl;
  59. 		}
  60. 	};
  61.  
  62.  
  63. 	// Mark both event listeners as passive so they
  64. 	// won't impact scroll performance
  65. 	const doCapture = { capture: true,  passive: true };
  66. 	const doBubble  = { capture: false, passive: true };
  67.  
  68. 	window.addEventListener("mousedown",  beforeClick, doCapture);
  69. 	window.addEventListener("keydown",    beforeClick, doCapture);
  70. 	window.addEventListener("touchstart", beforeClick, doCapture);
  71.  
  72. 	window.addEventListener("mousedown",  justBeforeClick, doBubble);
  73. 	window.addEventListener("keydown",    justBeforeClick, doBubble);
  74. 	window.addEventListener("touchstart", justBeforeClick, doBubble);
  75.  
  76.  
  77. 	// Patch navigator.sendBeacon() if it is available
  78. 	if (typeof unsafeWindow.Navigator.prototype.sendBeacon === "function") {
  79. 		// Firefox/Greasemonkey defines exportFunction to make
  80. 		// sandboxed functions callable by the page script.
  81. 		const exportFunction = (window.exportFunction) ? window.exportFunction : (f) => f;
  82.  
  83. 		// Fake sendBeacon() function that does nothing
  84. 		Reflect.defineProperty(unsafeWindow.Navigator.prototype, "sendBeacon", {
  85. 			value: exportFunction(function sendBeacon(url) { return true; }, unsafeWindow)
  86. 		});
  87. 	}
  88. })();