From 94e6486b3727e2b58875ea523241a6b4b2c4e363 Mon Sep 17 00:00:00 2001
From: Anton Evzhakov <anton@evz.name>
Date: Sun, 28 Nov 2021 14:39:43 +0200
Subject: [PATCH] fix(webpack): don't use default extensions if it's empty
 (fixes #855)

---
 packages/webpack4-loader/src/index.ts | 6 ++++++
 packages/webpack5-loader/src/index.ts | 6 ++++++
 2 files changed, 12 insertions(+)

diff --git a/packages/webpack4-loader/src/index.ts b/packages/webpack4-loader/src/index.ts
index cf11dd875..3a4848e26 100644
--- a/packages/webpack4-loader/src/index.ts
+++ b/packages/webpack4-loader/src/index.ts
@@ -80,6 +80,12 @@ export default function webpack4Loader(
   // This API is used by many loaders/plugins, so hope we're safe for a while
   const webpackResolveOptions = this._compilation?.options.resolve;
 
+  // Resolved configuration contains empty list of extensions as a default value
+  // https://github.com/callstack/linaria/issues/855
+  if (webpackResolveOptions.extensions?.length === 0) {
+    delete webpackResolveOptions.extensions;
+  }
+
   // Let's try to create a resolver with the webpack config
   let resolveSync = enhancedResolve.create.sync({
     ...resolveOptionsDefaults,
diff --git a/packages/webpack5-loader/src/index.ts b/packages/webpack5-loader/src/index.ts
index a5484d65f..7d100aede 100644
--- a/packages/webpack5-loader/src/index.ts
+++ b/packages/webpack5-loader/src/index.ts
@@ -68,6 +68,12 @@ export default function webpack5Loader(
   // This API is used by many loaders/plugins, so hope we're safe for a while
   const webpackResolveOptions = this._compilation?.options.resolve;
 
+  // Resolved configuration contains empty list of extensions as a default value
+  // https://github.com/callstack/linaria/issues/855
+  if (webpackResolveOptions.extensions?.length === 0) {
+    delete webpackResolveOptions.extensions;
+  }
+
   // Let's try to create a resolver with the webpack config
   let resolveSync = enhancedResolve.create.sync({
     ...resolveOptionsDefaults,