From 6c986a5180134c49b760843237d6e99a31dd61e3 Mon Sep 17 00:00:00 2001
From: fan wu <336798967+FanWu-ai@users.noreply.github.com>
Date: Sun, 11 Oct 2026 11:18:05 -0700
Subject: [PATCH] fix(isMagnetURI): restore case-insensitive scheme matching

Restore the scheme case-insensitivity lost by the prefix guard in #1992.
Add v1/v2, parameter-order and invalid-prefix regression cases.
---
 src/lib/isMagnetURI.js  |  2 +-
 test/validators.test.js | 26 ++++++++++++++++++++++++++
 2 files changed, 27 insertions(+), 1 deletion(-)

diff --git a/src/lib/isMagnetURI.js b/src/lib/isMagnetURI.js
index e00ee3c32..745a561d2 100644
--- a/src/lib/isMagnetURI.js
+++ b/src/lib/isMagnetURI.js
@@ -5,7 +5,7 @@ const magnetURIComponent = /(?:^magnet:\?|[^?&]&)xt(?:\.1)?=urn:(?:(?:aich|bitpr
 export default function isMagnetURI(url) {
   assertString(url);
 
-  if (url.indexOf('magnet:?') !== 0) {
+  if (!/^magnet:\?/i.test(url)) {
     return false;
   }
 
diff --git a/test/validators.test.js b/test/validators.test.js
index 98d2a12ff..8762b3601 100644
--- a/test/validators.test.js
+++ b/test/validators.test.js
@@ -12771,6 +12771,32 @@ describe('Validators', () => {
   });
 
 
+  it('should validate magnet URI schemes case-insensitively', () => {
+    const btih = '0123456789012345678901234567890123456789';
+    const btmh = `1220${'a'.repeat(64)}`;
+    test({
+      validator: 'isMagnetURI',
+      valid: [
+        `MAGNET:?xt=urn:btih:${btih}`,
+        `MaGnEt:?xt=urn:btih:${btih}`,
+        `MAGNET:?dn=example&xt=urn:btih:${btih}`,
+        `MaGnEt:?dn=example&xt=urn:btih:${btih}`,
+        `MAGNET:?xt=urn:btmh:${btmh}`,
+        `MaGnEt:?dn=example&xt=urn:btmh:${btmh}`,
+      ],
+      invalid: [
+        ` MAGNET:?xt=urn:btih:${btih}`,
+        `prefixMAGNET:?xt=urn:btih:${btih}`,
+        `MAGNETA:?xt=urn:btih:${btih}`,
+        `MAGNET::?xt=urn:btih:${btih}`,
+        `MAGNET:xt=urn:btih:${btih}`,
+        'MAGNET:?dn=example',
+        'MAGNET:?xt=urn:btih:1234',
+      ],
+    });
+  });
+
+
   it('should validate LatLong', () => {
     test({
       validator: 'isLatLong',