Add src/vxtwitter.user.js

src/vxtwitter.user.js

@@ -0,0 +1,28 @@
+// ==UserScript==
+// @name         Convert Twitter/X to FXTwitter
+// @namespace    http://tampermonkey.net/
+// @version      0.1
+// @description  Convert copied twitter.com and x.com links to vxtwitter.com
+// @author       You
+// @match        *://twitter.com/*
+// @match        *://x.com/*
+// @grant        none
+// ==/UserScript==
+
+(function() {
+    'use strict';
+
+    document.addEventListener('copy', function(e) {
+        let text = window.getSelection().toString();
+        const regex = /https?:\/\/(twitter\.com|x\.com)\/[a-zA-Z0-9_\-\/]+/g;
+
+        if (regex.test(text)) {
+            text = text.replace(regex, function(match) {
+                return match.replace(/(twitter\.com|x\.com)/, 'vxtwitter.com');
+            });
+            text = text.split('?')
+            e.clipboardData.setData('text/plain', text[0]);
+            e.preventDefault();
+        }
+    });
+})();