From b594f5bcc0349c670b04a1f089ef448c2db3c763 Mon Sep 17 00:00:00 2001
From: Tobias Koppers <tobias.koppers@googlemail.com>
Date: Tue, 17 Aug 2021 19:48:48 +0200
Subject: [PATCH] let loaders automatically infer source map setting (#28204)

These loaders automatically use the global source map setting when this option is omitted
---
 packages/next/build/webpack/config/blocks/css/loaders/global.ts | 2 --
 .../next/build/webpack/config/blocks/css/loaders/modules.ts     | 2 --
 2 files changed, 4 deletions(-)

diff --git a/packages/next/build/webpack/config/blocks/css/loaders/global.ts b/packages/next/build/webpack/config/blocks/css/loaders/global.ts
index 1c3de40ec68996d..984345f5b86f52e 100644
--- a/packages/next/build/webpack/config/blocks/css/loaders/global.ts
+++ b/packages/next/build/webpack/config/blocks/css/loaders/global.ts
@@ -27,7 +27,6 @@ export function getGlobalCssLoader(
     loader: require.resolve('next/dist/compiled/css-loader'),
     options: {
       importLoaders: 1 + preProcessors.length,
-      sourceMap: true,
       // Next.js controls CSS Modules eligibility:
       modules: false,
       url: cssFileResolve,
@@ -41,7 +40,6 @@ export function getGlobalCssLoader(
     loader: require.resolve('next/dist/compiled/postcss-loader'),
     options: {
       postcssOptions: { plugins: postCssPlugins, config: false },
-      sourceMap: true,
     },
   })
 
diff --git a/packages/next/build/webpack/config/blocks/css/loaders/modules.ts b/packages/next/build/webpack/config/blocks/css/loaders/modules.ts
index b9888f165c22712..e9b3034408545f3 100644
--- a/packages/next/build/webpack/config/blocks/css/loaders/modules.ts
+++ b/packages/next/build/webpack/config/blocks/css/loaders/modules.ts
@@ -28,7 +28,6 @@ export function getCssModuleLoader(
     loader: require.resolve('next/dist/compiled/css-loader'),
     options: {
       importLoaders: 1 + preProcessors.length,
-      sourceMap: true,
       // Use CJS mode for backwards compatibility:
       esModule: false,
       url: cssFileResolve,
@@ -57,7 +56,6 @@ export function getCssModuleLoader(
     loader: require.resolve('next/dist/compiled/postcss-loader'),
     options: {
       postcssOptions: { plugins: postCssPlugins, config: false },
-      sourceMap: true,
     },
   })