Add MediaWiki Redirects Fixer

MediaWiki Redirects Fixer.user.js

@@ -0,0 +1,46 @@
+// ==UserScript==
+// @name        MediaWiki Redirects Fixer
+// @namespace   blankie-scripts
+// @match       https://*.wikipedia.org/*
+// @grant       none
+// @version     1.0.0
+// @author      blankie
+// @description Fixes redirects of pages with anchors on Wikipedia/MediaWiki instances when Javascript is disabled
+// @inject-into content
+// @run-at      document-end
+// ==/UserScript==
+
+"use strict";
+
+function scrollToHash(scrollTo) {
+    if (!scrollTo) {
+        return;
+    }
+
+    let element = document.querySelector(scrollTo);
+    if (element) {
+        element.scrollIntoView();
+    }
+}
+
+for (let script of document.querySelectorAll("script")) {
+    let match = /;RLCONF=({"[\s\S]+?});RLSTATE={"/.exec(script.textContent);
+    if (!match) {
+        continue;
+    }
+
+    let rlconf = JSON.parse(match[1]);
+    if (rlconf.wgInternalRedirectTargetUrl) {
+        let url = new URL(rlconf.wgInternalRedirectTargetUrl, location);
+        let scrollTo = url.hash;
+        if (location.hash) {
+            url.hash = location.hash;
+            scrollTo = null;
+        }
+
+        history.replaceState(null, "", url);
+        scrollToHash(scrollTo);
+    }
+
+    break;
+}

README.md

@@ -87,6 +87,11 @@ elements
 Removes image loading placeholders from images loaded via Javascript, such as
 https://closeronline.co.uk, https://wired.com, and https://knowyourmeme.com.
 
+## MediaWiki Redirects Fixer
+
+Fixes redirects of pages with anchors on Wikipedia/MediaWiki instances when
+Javascript is disabled
+
 ## nightly.link buttons
 
 A script to add [nightly.link](https://nightly.link) buttons on artifacts and