From c27c2569cc7e218c2e6216fdc441db9aa4d82987 Mon Sep 17 00:00:00 2001
From: Jean Honlet <jehon@users.noreply.github.com>
Date: Fri, 13 Nov 2020 22:00:42 +0100
Subject: [PATCH] fix(middleware): catch errors when loading a module

Fix karma-runner/karma#3572
---
 lib/middleware/karma.js | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/lib/middleware/karma.js b/lib/middleware/karma.js
index c48332d12..cabeb2f81 100644
--- a/lib/middleware/karma.js
+++ b/lib/middleware/karma.js
@@ -193,7 +193,11 @@ function createKarmaMiddleware (
             } else {
               const scriptType = (SCRIPT_TYPE[fileType] || 'text/javascript')
               const crossOriginAttribute = includeCrossOriginAttribute ? 'crossorigin="anonymous"' : ''
-              scriptTags.push(`<script type="${scriptType}" src="${filePath}" ${crossOriginAttribute}></script>`)
+              if (fileType === 'module') {
+                scriptTags.push(`<script onerror="throw 'Error loading ${filePath}'" type="${scriptType}" src="${filePath}" ${crossOriginAttribute}></script>`)
+              } else {
+                scriptTags.push(`<script type="${scriptType}" src="${filePath}" ${crossOriginAttribute}></script>`)
+              }
             }
           }