fix: only reuse ident for whitelisted loaders

fix #1214

Author: yyx990803

Diff for: lib/plugin.js

@@ -121,7 +121,7 @@ function cloneRule (rule, normalizedRule) {
       }
       return true
     },
-    use: normalizedRule.use ? normalizedRule.use.map(reuseIdent) : undefined
+    use: normalizedRule.use ? normalizedRule.use.map(cleanIdent) : undefined
   })
 
   // delete shorthand since we have normalized use
@@ -138,16 +138,15 @@ function cloneRule (rule, normalizedRule) {
   return res
 }
 
-// Some loaders like babel-loader passes its own option directly to babel
-// and since babel validates the options, "ident" would cause an unknown option
-// error. For these loaders we'll bail out on the ident reuse.
-const reuseIdentBlackList = /babel-loader/
+const reuseIdentWhitelist = /css-loader/
 
-// Reuse options ident, so that imports from within css-loader would get the
-// exact same request prefixes, avoiding duplicated modules (#1199)
-function reuseIdent (use) {
-  if (use.ident && !reuseIdentBlackList.test(use.loader)) {
-    use.options.ident = use.ident
+function cleanIdent (use) {
+  if (use.ident) {
+    if (reuseIdentWhitelist.test(use.loader)) {
+      // Reuse options ident, so that imports from within css-loader would get the
+      // exact same request prefixes, avoiding duplicated modules (#1199)
+      use.options.ident = use.ident
+    }
     delete use.ident
   }
   return use