use reflect functions

lib/internal/modules/cjs/loader.js

@@ -48,6 +48,9 @@ const {
   ObjectSetPrototypeOf,
   Proxy,
   ReflectApply,
+  ReflectDeleteProperty,
+  ReflectGet,
+  ReflectHas,
   ReflectSet,
   RegExpPrototypeExec,
   SafeMap,
@@ -321,35 +324,24 @@ let patched = false;
 /* Make Module._cache case-insensitive on Windows */
 if (isWindows) {
   /* Create a proxy handler to intercept some operations */
+  const toLowerCaseIfString = (prop) => (typeof prop === 'string' ? StringPrototypeToLowerCase(prop) : prop);
   const cacheHandler = {
     __proto__: null,
-    get(target, prop) {
-      if (typeof prop === 'string') {
-        return target[StringPrototypeToLowerCase(prop)];
-      }
-      return target[prop];
+
+    get(target, prop, receiver) {
+      return ReflectGet(target, toLowerCaseIfString(prop), receiver);
     },
-    set(target, prop, value) {
-      if (typeof prop === 'string') {
-        target[StringPrototypeToLowerCase(prop)] = value;
-      } else {
-        target[prop] = value;
-      }
-      return true;
+
+    set(target, prop, value, receiver) {
+      return ReflectSet(target, toLowerCaseIfString(prop), value, receiver);
     },
+
     deleteProperty(target, prop) {
-      if (typeof prop === 'string') {
-        delete target[StringPrototypeToLowerCase(prop)];
-      } else {
-        delete target[prop];
-      }
-      return true;
+      return ReflectDeleteProperty(target, toLowerCaseIfString(prop));
     },
+
     has(target, prop) {
-      if (typeof prop === 'string') {
-        return StringPrototypeToLowerCase(prop) in target;
-      }
-      return prop in target;
+      return ReflectHas(target, toLowerCaseIfString(prop));
     },
   };