module: add isBuiltIn method

Author: hemanth

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;

test/parallel/test-module-isBuiltIn.js

@@ -0,0 +1,14 @@
+'use strict';
+require('../common');
+const assert = require('assert');
+const { builtinModules } = require('module');
+
+// Includes modules in lib/ (even deprecated ones)
+assert(builtinModules.includes('http'));
+assert(builtinModules.includes('sys'));
+
+// Does not include internal modules
+assert.deepStrictEqual(
+  builtinModules.filter((mod) => mod.startsWith('internal/')),
+  []
+);