From ad139bfb630ce00ffd95b7a07c25f901bb6b5a50 Mon Sep 17 00:00:00 2001
From: PKlknr <60601481+PKlknr@users.noreply.github.com>
Date: Tue, 18 Feb 2020 09:31:04 +0100
Subject: [PATCH] Log warnings in svelte/register when in dev-mode (#4365)

---
 register.js | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/register.js b/register.js
index 3278c1cbf5..25f8aa4309 100644
--- a/register.js
+++ b/register.js
@@ -36,7 +36,15 @@ function registerExtension(extension) {
 			format: 'cjs'
 		});
 
-		const { js } = compile(fs.readFileSync(filename, 'utf-8'), options);
+		const { js, warnings } = compile(fs.readFileSync(filename, 'utf-8'), options);
+		
+		if (options.dev) {
+			warnings.forEach(warning => {
+				console.warn(`\nSvelte Warning in ${warning.filename}:`);
+				console.warn(warning.message);
+				console.warn(warning.frame);
+			})
+		}
 
 		return module._compile(js.code, filename);
 	};