From a66a302b63f50e05654542e575c58f45d1596b4d Mon Sep 17 00:00:00 2001
From: "hemanth.hm" <hemanth.hm@gmail.com>
Date: Tue, 14 Jun 2022 00:29:33 +0000
Subject: [PATCH] module: add isBuiltIn method

---
 lib/internal/modules/cjs/loader.js     |  6 ++++++
 test/parallel/test-module-isBuiltIn.js | 16 ++++++++++++++++
 2 files changed, 22 insertions(+)
 create mode 100644 test/parallel/test-module-isBuiltIn.js

diff --git a/lib/internal/modules/cjs/loader.js b/lib/internal/modules/cjs/loader.js
index b7fc3f9b2a1ea5..3c88c0e543be97 100644
--- a/lib/internal/modules/cjs/loader.js
+++ b/lib/internal/modules/cjs/loader.js
@@ -191,6 +191,7 @@ for (const { 0: id, 1: mod } of NativeModule.map) {
 ObjectFreeze(builtinModules);
 Module.builtinModules = builtinModules;
 
+
 Module._cache = ObjectCreate(null);
 Module._pathCache = ObjectCreate(null);
 Module._extensions = ObjectCreate(null);
@@ -1293,5 +1294,10 @@ Module.syncBuiltinESMExports = function syncBuiltinESMExports() {
   }
 };
 
+Module.isBuiltIn = function isBuiltIn(moduleName) {
+  moduleName = String(moduleName).replace('node:', '');
+  return Module.builtinModules.includes(moduleName);
+};
+
 // Backwards compatibility
 Module.Module = Module;
diff --git a/test/parallel/test-module-isBuiltIn.js b/test/parallel/test-module-isBuiltIn.js
new file mode 100644
index 00000000000000..96d32efa44a748
--- /dev/null
+++ b/test/parallel/test-module-isBuiltIn.js
@@ -0,0 +1,16 @@
+'use strict';
+require('../common');
+const assert = require('assert');
+const { isBuiltIn } = require('module');
+
+// Includes modules in lib/ (even deprecated ones)
+assert(isBuiltIn('http'));
+assert(isBuiltIn('sys'));
+
+// Does not include internal modules
+assert(!isBuiltIn('internal'));
+assert(!isBuiltIn(''));
+assert(!isBuiltIn(undefined));
+
+
+