feat(unskim): strip tracking params from extracted destination URL

bookmarklets.json

@@ -98,7 +98,7 @@
     {
       "name": "unskim",
       "file": "unskim.bookmarklet",
-      "version": "2.0.2"
+      "version": "2.1.0"
     },
     {
       "name": "x-man",

dist/unskim.bookmarklet

@@ -1 +1 @@
-javascript:'use%20strict'%3B(()=%3E%7Blet%20e=new%20URL(document.location.href)%3Bif('safari-resource:%2FErrorPage.html'===e.href)%7Bconst%20t=document.querySelector('p.error-message')%3F.textContent%3F.match(%2FSafari%20can't%20open%20the%20page%20%22(https%3F:%5B%5E%22%5D%2B)%22%2F)%3F.%5B1%5D%3Bt%26%26(e=new%20URL(t))%7Dif(13%3Ee.search.length)return%3Bconst%20t=new%20URLSearchParams(e.search)%2Cr=%5B'url'%2C'destination'%2C'redirect'%2C'target'%2C'goto'%2C'u'%2C'dest'%2C'link'%2C'out'%5D.filter(e=%3Et.has(e)).map(e=%3E%7Bconst%20r=t.get(e)%3Breturn%20r%3FdecodeURIComponent(r):''%7D).find(e=%3Ee.match(%2F%5Ehttps%3F:%2F))%3Br%26%26window.location.replace(new%20URL(r))%7D)()%3Bvoid'2.0.2'
+javascript:'use%20strict'%3B(()=%3E%7Blet%20e=new%20URL(document.location.href)%3Bif('safari-resource:%2FErrorPage.html'===e.href)%7Bconst%20t=document.querySelector('p.error-message')%3F.textContent%3F.match(%2FSafari%20can't%20open%20the%20page%20%22(https%3F:%5B%5E%22%5D%2B)%22%2F)%3F.%5B1%5D%3Bt%26%26(e=new%20URL(t))%7Dif(13%3Ee.search.length)return%3Bconst%20t=new%20URLSearchParams(e.search)%2Cr=%5B'url'%2C'destination'%2C'redirect'%2C'target'%2C'goto'%2C'u'%2C'dest'%2C'link'%2C'out'%5D.filter(e=%3Et.has(e)).map(e=%3E%7Bconst%20r=t.get(e)%3Breturn%20r%3FdecodeURIComponent(r):''%7D).find(e=%3Ee.match(%2F%5Ehttps%3F:%2F))%3Bif(r)%7Bconst%20e=new%20URL(r)%3Bif(e.searchParams.size%3E0)%7Bconst%20t=new%20URLSearchParams(e.search)%3Bfor(const%20e%20of%5B...t.keys()%5D)%7Bconst%20r=e.toLowerCase()%3B(r.startsWith('utm%5F')%7C%7Cr.startsWith('fb%5F')%7C%7C%5B'fbclid'%2C'gclid'%2C'msclkid'%2C'ref'%2C'referrer'%2C'ttclid'%2C'twclid'%5D.includes(r))%26%26t.delete(e)%7De.search=t.toString()%7Dwindow.location.replace(e)%7D%7D)()%3Bvoid'2.1.0'

src/unskim.ts

@@ -35,9 +35,21 @@
         })
         .find((url: string) => url.match(/^https?:/));
 
-    // navigate to new URL if found
+    // navigate to new URL if found, after stripping common tracking params
     if (urlCandidate) {
-        window.location.replace(new URL(urlCandidate));
+        const targetUrl: URL = new URL(urlCandidate);
+        if (targetUrl.searchParams.size > 0) {
+            const targetParams: URLSearchParams = new URLSearchParams(targetUrl.search);
+            for (const key of [...targetParams.keys()]) {
+                const k: string = key.toLowerCase();
+                if (k.startsWith('utm_') || k.startsWith('fb_') ||
+                    ['fbclid', 'gclid', 'msclkid', 'ref', 'referrer', 'ttclid', 'twclid'].includes(k)) {
+                    targetParams.delete(key);
+                }
+            }
+            targetUrl.search = targetParams.toString();
+        }
+        window.location.replace(targetUrl);
     }
 
 })();