From 436452dcbaa548dc4a7fdc5a06a3a1529db9541f Mon Sep 17 00:00:00 2001
From: Michael Mok <pmmmwh@gmail.com>
Date: Sun, 27 Jun 2021 19:31:20 +0200
Subject: [PATCH] fix: handle case when dep.request is undefined

---
 lib/index.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/index.js b/lib/index.js
index 3f9f88e7..2dc42372 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -87,8 +87,8 @@ class ReactRefreshPlugin {
           // Exhaustively search all entries for `integrationEntry`.
           // If found, mark those entries and the index of `integrationEntry`.
           for (const [name, entryData] of compilation.entries.entries()) {
-            const index = entryData.dependencies.findIndex((dep) =>
-              dep.request.includes(integrationEntry)
+            const index = entryData.dependencies.findIndex(
+              (dep) => dep.request && dep.request.includes(integrationEntry)
             );
             if (index !== -1) {
               socketEntryData.push({ name, index });