add MANGLING_DEBUG option

vercel · Sep 27, 2022 · 2537fdb · 2537fdb
1 parent c86a9b9
commit 2537fdb
Showing 1 changed file with 16 additions and 1 deletion.
diff --git a/packages/next/build/webpack-config.ts b/packages/next/build/webpack-config.ts
@@ -902,13 +902,28 @@ export default async function getBaseWebpackConfig(
       comparisons: false,
       inline: 2, // https://github.com/vercel/next.js/issues/7178#issuecomment-493048965
     },
-    mangle: { safari10: true },
+    mangle: {
+      safari10: true,
+      ...(process.env.MANGLING_DEBUG
+        ? {
+            toplevel: true,
+            module: true,
+            keep_classnames: true,
+            keep_fnames: true,
+          }
+        : {}),
+    },
     output: {
       ecma: 5,
       safari10: true,
       comments: false,
       // Fixes usage of Emoji and certain Regex
       ascii_only: true,
+      ...(process.env.MANGLING_DEBUG
+        ? {
+            beautify: true,
+          }
+        : {}),
     },
   }