feat: do not hash localName if the localName is inlined

webpack-contrib · Jan 26, 2022 · f7f3072 · f7f3072
1 parent cbe3898
commit f7f3072
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Showing 2 changed files with 838 additions and 829 deletions.
diff --git a/src/utils.js b/src/utils.js
@@ -336,8 +336,17 @@ function defaultGetLocalIdent(
     path.relative(context, resourcePath)
   );
 
-  // eslint-disable-next-line no-param-reassign
-  options.content = `${relativeResourcePath}\x00${localName}`;
+  if (/\[local\]/.test(localIdentName)) {
+    // We don't have to include the localName in the string to be hashed if it
+    // would be present in the generated identifier anyway.
+    // All identifiers from the same module gets the same hash - good for GZIP!
+
+    // eslint-disable-next-line no-param-reassign
+    options.content = relativeResourcePath;
+  } else {
+    // eslint-disable-next-line no-param-reassign
+    options.content = `${relativeResourcePath}\x00${localName}`;
+  }
 
   let { hashFunction, hashDigest, hashDigestLength } = options;
   const matches = localIdentName.match(