From 2a6bbc56d2ecad904a6a0dea4208b8cc6e6a3f07 Mon Sep 17 00:00:00 2001
From: Devon Govett <devongovett@gmail.com>
Date: Mon, 25 Nov 2024 09:01:47 -0800
Subject: [PATCH] Fix non file scheme in SASS

Fixes #10019
---
 packages/core/integration-tests/test/sass.js | 26 ++++++++++++++++++++
 packages/transformers/sass/src/modern.js     |  2 +-
 2 files changed, 27 insertions(+), 1 deletion(-)

diff --git a/packages/core/integration-tests/test/sass.js b/packages/core/integration-tests/test/sass.js
index b3574588593..98199d8d5f2 100644
--- a/packages/core/integration-tests/test/sass.js
+++ b/packages/core/integration-tests/test/sass.js
@@ -399,4 +399,30 @@ describe('sass', function () {
       inputFS: overlayFS,
     });
   });
+
+  it('should support npm scheme', async function () {
+    const dir = path.join(__dirname, 'sass-extensions');
+    overlayFS.mkdirp(dir);
+
+    await fsFixture(overlayFS, dir)`
+      index.js:
+        import './main.scss';
+
+      main.scss:
+        @use 'npm:test' as test;
+
+      node_modules/test/package.json:
+        { "name": "test" }
+
+      node_modules/test/_index.scss:
+        @use 'other';
+
+      node_modules/test/_other.scss:
+        .foo { color: red }
+      `;
+
+    await bundle(path.join(dir, '/index.js'), {
+      inputFS: overlayFS,
+    });
+  });
 });
diff --git a/packages/transformers/sass/src/modern.js b/packages/transformers/sass/src/modern.js
index 1f7bcdc81eb..4bf6732399d 100644
--- a/packages/transformers/sass/src/modern.js
+++ b/packages/transformers/sass/src/modern.js
@@ -98,7 +98,7 @@ function resolvePathImporter({
       let containingPath = containingUrl
         ? fileURLToPath(containingUrl)
         : asset.filePath;
-      if (!containingUrl) {
+      if (!containingUrl && url.startsWith('file:')) {
         // If containingUrl is not provided, then url should be an absolute file:/// URL.
         let filePath = fileURLToPath(url);
         url = path.relative(path.dirname(containingPath), filePath);