From 1f2aaf9376ec7c05c46850fefd81a0dd12943df2 Mon Sep 17 00:00:00 2001
From: Marvin Hagemeister <hello@marvinh.dev>
Date: Sun, 4 Jul 2021 09:25:51 +0200
Subject: [PATCH] Redirect Chrome specific source map URLs

---
 packages/wmr/src/server.js | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/packages/wmr/src/server.js b/packages/wmr/src/server.js
index b111528c8..82ccc9733 100644
--- a/packages/wmr/src/server.js
+++ b/packages/wmr/src/server.js
@@ -106,6 +106,20 @@ export default async function server({ cwd, root, overlayDir, middleware, http2,
 
 	app.use('/@npm', npmMiddleware({ alias, optimize, cwd }));
 
+	// Chrome devtools often adds `?%20[sm]` to the url
+	// to differentiate between sourcemaps
+	app.use((req, res, next) => {
+		if (/\?%20\[sm\]$/.test(req.url)) {
+			res.writeHead(302, {
+				Location: req.url.replace('?%20[sm]', '.map')
+			});
+			res.end();
+			return;
+		}
+
+		next();
+	});
+
 	if (middleware) {
 		app.use(...middleware);
 	}