Merge pull request #13871 from Microsoft/master-fix13709

[Fix 13709] - Emit __esmodule

src/compiler/checker.ts

@@ -1,4 +1,4 @@
-/// <reference path="moduleNameResolver.ts"/>
+/// <reference path="moduleNameResolver.ts"/>
 /// <reference path="binder.ts"/>
 
 /* @internal */
@@ -22084,6 +22084,11 @@ namespace ts {
                 }
             }
 
+            if (compilerOptions.module !== ModuleKind.ES2015 && compilerOptions.module !== ModuleKind.System && !compilerOptions.noEmit &&
+                !isInAmbientContext(node.parent.parent) && hasModifier(node.parent.parent, ModifierFlags.Export)) {
+                checkESModuleMarker(node.name);
+            }
+
             const checkLetConstNames = (isLet(node) || isConst(node));
 
             // 1. LexicalDeclaration : LetOrConst BindingList ;
@@ -22096,6 +22101,22 @@ namespace ts {
             return checkLetConstNames && checkGrammarNameInLetOrConstDeclarations(node.name);
         }
 
+        function checkESModuleMarker(name: Identifier | BindingPattern): boolean {
+            if (name.kind === SyntaxKind.Identifier) {
+                if (unescapeIdentifier(name.text) === "__esModule") {
+                    return grammarErrorOnNode(name, Diagnostics.Identifier_expected_esModule_is_reserved_as_an_exported_marker_when_transforming_ECMAScript_modules);
+                }
+            }
+            else {
+                const elements = (<BindingPattern>name).elements;
+                for (const element of elements) {
+                    if (!isOmittedExpression(element)) {
+                        return checkESModuleMarker(element.name);
+                    }
+                }
+            }
+        }
+
         function checkGrammarNameInLetOrConstDeclarations(name: Identifier | BindingPattern): boolean {
             if (name.kind === SyntaxKind.Identifier) {
                 if ((<Identifier>name).originalKeywordKind === SyntaxKind.LetKeyword) {

src/compiler/diagnosticMessages.json

@@ -671,6 +671,10 @@
         "category": "Error",
         "code": 1215
     },
+    "Identifier expected. '__esModule' is reserved as an exported marker when transforming ECMAScript modules.": {
+        "category": "Error",
+        "code": 1216
+    },
     "Export assignment is not supported when '--module' flag is 'system'.": {
         "category": "Error",
         "code": 1218

src/compiler/transformers/module/module.ts

@@ -83,6 +83,11 @@ namespace ts {
 
             const statements: Statement[] = [];
             const statementOffset = addPrologueDirectives(statements, node.statements, /*ensureUseStrict*/ !compilerOptions.noImplicitUseStrict, sourceElementVisitor);
+
+            if (!currentModuleInfo.exportEquals) {
+                append(statements, createUnderscoreUnderscoreESModule());
+            }
+
             append(statements, visitNode(currentModuleInfo.externalHelpersImportDeclaration, sourceElementVisitor, isStatement, /*optional*/ true));
             addRange(statements, visitNodes(node.statements, sourceElementVisitor, isStatement, statementOffset));
             addRange(statements, endLexicalEnvironment());
@@ -92,7 +97,6 @@ namespace ts {
             if (currentModuleInfo.hasExportStarsToExportValues) {
                 addEmitHelper(updated, exportStarHelper);
             }
-
             return updated;
         }
 
@@ -371,6 +375,10 @@ namespace ts {
             const statements: Statement[] = [];
             const statementOffset = addPrologueDirectives(statements, node.statements, /*ensureUseStrict*/ !compilerOptions.noImplicitUseStrict, sourceElementVisitor);
 
+            if (!currentModuleInfo.exportEquals) {
+                append(statements, createUnderscoreUnderscoreESModule());
+            }
+
             // Visit each statement of the module body.
             append(statements, visitNode(currentModuleInfo.externalHelpersImportDeclaration, sourceElementVisitor, isStatement, /*optional*/ true));
             addRange(statements, visitNodes(node.statements, sourceElementVisitor, isStatement, statementOffset));
@@ -665,6 +673,7 @@ namespace ts {
             }
 
             const generatedName = getGeneratedNameForNode(node);
+
             if (node.exportClause) {
                 const statements: Statement[] = [];
                 // export { x, y } from "mod";
@@ -838,6 +847,7 @@ namespace ts {
             let statements: Statement[];
             let variables: VariableDeclaration[];
             let expressions: Expression[];
+
             if (hasModifier(node, ModifierFlags.Export)) {
                 let modifiers: NodeArray<Modifier>;
 
@@ -1127,43 +1137,39 @@ namespace ts {
          * @param allowComments Whether to allow comments on the export.
          */
         function appendExportStatement(statements: Statement[] | undefined, exportName: Identifier, expression: Expression, location?: TextRange, allowComments?: boolean): Statement[] | undefined {
-            if (exportName.text === "default") {
-                const sourceFile = getOriginalNode(currentSourceFile, isSourceFile);
-                if (sourceFile && !sourceFile.symbol.exports.get("___esModule")) {
-                    if (languageVersion === ScriptTarget.ES3) {
-                        statements = append(statements,
-                            createStatement(
-                                createExportExpression(
-                                    createIdentifier("__esModule"),
-                                    createTrue()
-                                )
-                            )
-                        );
-                    }
-                    else {
-                        statements = append(statements,
-                            createStatement(
-                                createCall(
-                                    createPropertyAccess(createIdentifier("Object"), "defineProperty"),
-                                    /*typeArguments*/ undefined,
-                                    [
-                                        createIdentifier("exports"),
-                                        createLiteral("__esModule"),
-                                        createObjectLiteral([
-                                            createPropertyAssignment("value", createTrue())
-                                        ])
-                                    ]
-                                )
-                            )
-                        );
-                    }
-                }
-            }
-
             statements = append(statements, createExportStatement(exportName, expression, location, allowComments));
             return statements;
         }
 
+        function createUnderscoreUnderscoreESModule() {
+            let statement: Statement;
+            if (languageVersion === ScriptTarget.ES3) {
+                statement = createStatement(
+                    createExportExpression(
+                        createIdentifier("__esModule"),
+                        createLiteral(true)
+                    )
+                )
+            }
+            else {
+                statement = createStatement(
+                    createCall(
+                        createPropertyAccess(createIdentifier("Object"), "defineProperty"),
+                        /*typeArguments*/ undefined,
+                        [
+                            createIdentifier("exports"),
+                            createLiteral("__esModule"),
+                            createObjectLiteral([
+                                createPropertyAssignment("value", createLiteral(true))
+                            ])
+                        ]
+                    )
+                );
+            }
+            setEmitFlags(statement, EmitFlags.CustomPrologue);
+            return statement;
+        }
+
         /**
          * Creates a call to the current file's export function to export a value.
          *

src/harness/unittests/compileOnSave.ts

@@ -520,7 +520,7 @@ namespace ts.projectSystem {
 
             const expectedEmittedFileName = "/a/b/f1.js";
             assert.isTrue(host.fileExists(expectedEmittedFileName));
-            assert.equal(host.readFile(expectedEmittedFileName), `"use strict";\r\nfunction Foo() { return 10; }\r\nexports.Foo = Foo;\r\n`);
+            assert.equal(host.readFile(expectedEmittedFileName), `"use strict";\r\nexports.__esModule = true;\r\nfunction Foo() { return 10; }\r\nexports.Foo = Foo;\r\n`);
         });
 
         it("shoud not emit js files in external projects", () => {

tests/baselines/reference/APISample_compile.js

@@ -41,6 +41,7 @@ compile(process.argv.slice(2), {
  *       Please log a "breaking change" issue for any API breaking change affecting this issue
  */
 "use strict";
+exports.__esModule = true;
 var ts = require("typescript");
 function compile(fileNames, options) {
     var program = ts.createProgram(fileNames, options);

tests/baselines/reference/APISample_linter.js

@@ -71,6 +71,7 @@ fileNames.forEach(fileName => {
  *       Please log a "breaking change" issue for any API breaking change affecting this issue
  */
 "use strict";
+exports.__esModule = true;
 var ts = require("typescript");
 function delint(sourceFile) {
     delintNode(sourceFile);

tests/baselines/reference/APISample_parseConfig.js

@@ -43,6 +43,7 @@ export function createProgram(rootFiles: string[], compilerOptionsJson: string):
  *       Please log a "breaking change" issue for any API breaking change affecting this issue
  */
 "use strict";
+exports.__esModule = true;
 var ts = require("typescript");
 function printError(error) {
     if (!error) {

tests/baselines/reference/APISample_transform.js

@@ -23,6 +23,7 @@ console.log(JSON.stringify(result));
  *       Please log a "breaking change" issue for any API breaking change affecting this issue
  */
 "use strict";
+exports.__esModule = true;
 var ts = require("typescript");
 var source = "let x: string  = 'string'";
 var result = ts.transpile(source, { module: ts.ModuleKind.CommonJS });

tests/baselines/reference/APISample_watcher.js

@@ -116,6 +116,7 @@ watch(currentDirectoryFiles, { module: ts.ModuleKind.CommonJS });
  *       Please log a "breaking change" issue for any API breaking change affecting this issue
  */
 "use strict";
+exports.__esModule = true;
 var ts = require("typescript");
 function watch(rootFileNames, options) {
     var files = {};

tests/baselines/reference/TwoInternalModulesThatMergeEachWithExportedLocalVarsOfTheSameName.js

@@ -31,6 +31,7 @@ export module A {
 
 //// [part1.js]
 "use strict";
+exports.__esModule = true;
 var A;
 (function (A) {
     var Utils;
@@ -44,6 +45,7 @@ var A;
 })(A = exports.A || (exports.A = {}));
 //// [part2.js]
 "use strict";
+exports.__esModule = true;
 var A;
 (function (A) {
     // collision with 'Origin' var in other part of merged module

tests/baselines/reference/aliasAssignments.js

@@ -15,6 +15,7 @@ y = moduleA; // should be error
 
 //// [aliasAssignments_moduleA.js]
 "use strict";
+exports.__esModule = true;
 var someClass = (function () {
     function someClass() {
     }
@@ -23,6 +24,7 @@ var someClass = (function () {
 exports.someClass = someClass;
 //// [aliasAssignments_1.js]
 "use strict";
+exports.__esModule = true;
 var moduleA = require("./aliasAssignments_moduleA");
 var x = moduleA;
 x = 1; // Should be error

tests/baselines/reference/aliasOnMergedModuleInterface.js

@@ -24,6 +24,7 @@ var x: foo.A = foo.bar("hello"); // foo.A should be ok but foo.bar should be err
 //// [aliasOnMergedModuleInterface_0.js]
 //// [aliasOnMergedModuleInterface_1.js]
 "use strict";
+exports.__esModule = true;
 var z;
 z.bar("hello"); // This should be ok
 var x = foo.bar("hello"); // foo.A should be ok but foo.bar should be error

tests/baselines/reference/aliasUsageInAccessorsOfClass.js

@@ -29,6 +29,7 @@ class C2 {
 
 //// [aliasUsage1_backbone.js]
 "use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
 var Model = (function () {
     function Model() {
     }
@@ -47,6 +48,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
+Object.defineProperty(exports, "__esModule", { value: true });
 var Backbone = require("./aliasUsage1_backbone");
 var VisualizationModel = (function (_super) {
     __extends(VisualizationModel, _super);
@@ -58,6 +60,7 @@ var VisualizationModel = (function (_super) {
 exports.VisualizationModel = VisualizationModel;
 //// [aliasUsage1_main.js]
 "use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
 var moduleA = require("./aliasUsage1_moduleA");
 var C2 = (function () {
     function C2() {

tests/baselines/reference/aliasUsageInArray.js

@@ -23,6 +23,7 @@ var xs2: typeof moduleA[] = [moduleA];
 
 //// [aliasUsageInArray_backbone.js]
 "use strict";
+exports.__esModule = true;
 var Model = (function () {
     function Model() {
     }
@@ -41,6 +42,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
+exports.__esModule = true;
 var Backbone = require("./aliasUsageInArray_backbone");
 var VisualizationModel = (function (_super) {
     __extends(VisualizationModel, _super);
@@ -52,6 +54,7 @@ var VisualizationModel = (function (_super) {
 exports.VisualizationModel = VisualizationModel;
 //// [aliasUsageInArray_main.js]
 "use strict";
+exports.__esModule = true;
 var moduleA = require("./aliasUsageInArray_moduleA");
 var xs = [moduleA];
 var xs2 = [moduleA];

tests/baselines/reference/aliasUsageInFunctionExpression.js

@@ -22,6 +22,7 @@ f = (x) => moduleA;
 
 //// [aliasUsageInFunctionExpression_backbone.js]
 "use strict";
+exports.__esModule = true;
 var Model = (function () {
     function Model() {
     }
@@ -40,6 +41,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
+exports.__esModule = true;
 var Backbone = require("./aliasUsageInFunctionExpression_backbone");
 var VisualizationModel = (function (_super) {
     __extends(VisualizationModel, _super);
@@ -51,6 +53,7 @@ var VisualizationModel = (function (_super) {
 exports.VisualizationModel = VisualizationModel;
 //// [aliasUsageInFunctionExpression_main.js]
 "use strict";
+exports.__esModule = true;
 var moduleA = require("./aliasUsageInFunctionExpression_moduleA");
 var f = function (x) { return x; };
 f = function (x) { return moduleA; };

tests/baselines/reference/aliasUsageInGenericFunction.js

@@ -26,6 +26,7 @@ var r2 = foo({ a: <IHasVisualizationModel>null });
 
 //// [aliasUsageInGenericFunction_backbone.js]
 "use strict";
+exports.__esModule = true;
 var Model = (function () {
     function Model() {
     }
@@ -44,6 +45,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
+exports.__esModule = true;
 var Backbone = require("./aliasUsageInGenericFunction_backbone");
 var VisualizationModel = (function (_super) {
     __extends(VisualizationModel, _super);
@@ -55,6 +57,7 @@ var VisualizationModel = (function (_super) {
 exports.VisualizationModel = VisualizationModel;
 //// [aliasUsageInGenericFunction_main.js]
 "use strict";
+exports.__esModule = true;
 var moduleA = require("./aliasUsageInGenericFunction_moduleA");
 function foo(x) {
     return x;

tests/baselines/reference/aliasUsageInIndexerOfClass.js

@@ -28,6 +28,7 @@ class N2 {
 
 //// [aliasUsageInIndexerOfClass_backbone.js]
 "use strict";
+exports.__esModule = true;
 var Model = (function () {
     function Model() {
     }
@@ -46,6 +47,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
+exports.__esModule = true;
 var Backbone = require("./aliasUsageInIndexerOfClass_backbone");
 var VisualizationModel = (function (_super) {
     __extends(VisualizationModel, _super);
@@ -57,6 +59,7 @@ var VisualizationModel = (function (_super) {
 exports.VisualizationModel = VisualizationModel;
 //// [aliasUsageInIndexerOfClass_main.js]
 "use strict";
+exports.__esModule = true;
 var moduleA = require("./aliasUsageInIndexerOfClass_moduleA");
 var N = (function () {
     function N() {

tests/baselines/reference/aliasUsageInObjectLiteral.js

@@ -23,6 +23,7 @@ var c: { y: { z: IHasVisualizationModel } } = { y: { z: moduleA } };
 
 //// [aliasUsageInObjectLiteral_backbone.js]
 "use strict";
+exports.__esModule = true;
 var Model = (function () {
     function Model() {
     }
@@ -41,6 +42,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
+exports.__esModule = true;
 var Backbone = require("./aliasUsageInObjectLiteral_backbone");
 var VisualizationModel = (function (_super) {
     __extends(VisualizationModel, _super);
@@ -52,6 +54,7 @@ var VisualizationModel = (function (_super) {
 exports.VisualizationModel = VisualizationModel;
 //// [aliasUsageInObjectLiteral_main.js]
 "use strict";
+exports.__esModule = true;
 var moduleA = require("./aliasUsageInObjectLiteral_moduleA");
 var a = { x: moduleA };
 var b = { x: moduleA };

tests/baselines/reference/aliasUsageInOrExpression.js

@@ -26,6 +26,7 @@ var f: { x: IHasVisualizationModel } = <{ x: IHasVisualizationModel }>null ? { x
 
 //// [aliasUsageInOrExpression_backbone.js]
 "use strict";
+exports.__esModule = true;
 var Model = (function () {
     function Model() {
     }
@@ -44,6 +45,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
+exports.__esModule = true;
 var Backbone = require("./aliasUsageInOrExpression_backbone");
 var VisualizationModel = (function (_super) {
     __extends(VisualizationModel, _super);
@@ -55,6 +57,7 @@ var VisualizationModel = (function (_super) {
 exports.VisualizationModel = VisualizationModel;
 //// [aliasUsageInOrExpression_main.js]
 "use strict";
+exports.__esModule = true;
 var moduleA = require("./aliasUsageInOrExpression_moduleA");
 var i;
 var d1 = i || moduleA;

tests/baselines/reference/aliasUsageInTypeArgumentOfExtendsClause.js

@@ -26,6 +26,7 @@ class D extends C<IHasVisualizationModel> {
 
 //// [aliasUsageInTypeArgumentOfExtendsClause_backbone.js]
 "use strict";
+exports.__esModule = true;
 var Model = (function () {
     function Model() {
     }
@@ -44,6 +45,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
+exports.__esModule = true;
 var Backbone = require("./aliasUsageInTypeArgumentOfExtendsClause_backbone");
 var VisualizationModel = (function (_super) {
     __extends(VisualizationModel, _super);
@@ -65,6 +67,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
+exports.__esModule = true;
 var moduleA = require("./aliasUsageInTypeArgumentOfExtendsClause_moduleA");
 var C = (function () {
     function C() {

tests/baselines/reference/aliasUsageInVarAssignment.js

@@ -22,6 +22,7 @@ var m: typeof moduleA = i;
 
 //// [aliasUsageInVarAssignment_backbone.js]
 "use strict";
+exports.__esModule = true;
 var Model = (function () {
     function Model() {
     }
@@ -40,6 +41,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
+exports.__esModule = true;
 var Backbone = require("./aliasUsageInVarAssignment_backbone");
 var VisualizationModel = (function (_super) {
     __extends(VisualizationModel, _super);
@@ -51,5 +53,6 @@ var VisualizationModel = (function (_super) {
 exports.VisualizationModel = VisualizationModel;
 //// [aliasUsageInVarAssignment_main.js]
 "use strict";
+exports.__esModule = true;
 var i;
 var m = i;

tests/baselines/reference/aliasUsedAsNameValue.js

@@ -20,12 +20,15 @@ export var a = function () {
 
 //// [aliasUsedAsNameValue_0.js]
 "use strict";
+exports.__esModule = true;
 //// [aliasUsedAsNameValue_1.js]
 "use strict";
+exports.__esModule = true;
 function b(a) { return null; }
 exports.b = b;
 //// [aliasUsedAsNameValue_2.js]
 "use strict";
+exports.__esModule = true;
 ///<reference path='aliasUsedAsNameValue_0.ts' />
 ///<reference path='aliasUsedAsNameValue_1.ts' />
 var mod = require("./aliasUsedAsNameValue_0");

tests/baselines/reference/aliasWithInterfaceExportAssignmentUsedInVarInitializer.js

@@ -12,6 +12,8 @@ var d = b.q3;
 
 //// [aliasWithInterfaceExportAssignmentUsedInVarInitializer_0.js]
 "use strict";
+exports.__esModule = true;
 //// [aliasWithInterfaceExportAssignmentUsedInVarInitializer_1.js]
 "use strict";
+exports.__esModule = true;
 var d = b.q3;

tests/baselines/reference/allowSyntheticDefaultImports1.js

@@ -12,6 +12,7 @@ export class Foo {
 
 //// [b.js]
 "use strict";
+exports.__esModule = true;
 var Foo = (function () {
     function Foo() {
     }
@@ -20,5 +21,6 @@ var Foo = (function () {
 exports.Foo = Foo;
 //// [a.js]
 "use strict";
+exports.__esModule = true;
 var b_1 = require("./b");
 exports.x = new b_1["default"].Foo();

tests/baselines/reference/allowSyntheticDefaultImports10.js

@@ -12,6 +12,7 @@ Foo.default.default.foo();
 
 //// [a.js]
 "use strict";
+exports.__esModule = true;
 var Foo = require("./b");
 Foo["default"].bar();
 Foo["default"]["default"].foo();

tests/baselines/reference/allowSyntheticDefaultImports4.js

@@ -13,5 +13,6 @@ export var x = new Foo();
 
 //// [a.js]
 "use strict";
+exports.__esModule = true;
 var b_1 = require("./b");
 exports.x = new b_1["default"]();

tests/baselines/reference/allowSyntheticDefaultImports9.js

@@ -12,6 +12,7 @@ Foo.foo();
 
 //// [a.js]
 "use strict";
+exports.__esModule = true;
 var b_1 = require("./b");
 b_1["default"].bar();
 b_1["default"].foo();

tests/baselines/reference/alwaysStrictModule4.js

@@ -5,5 +5,6 @@ export const a = 1
 
 //// [alwaysStrictModule4.js]
 "use strict";
+exports.__esModule = true;
 // Module commonjs
 exports.a = 1;

tests/baselines/reference/alwaysStrictModule6.js

@@ -5,5 +5,6 @@ export const a = 1;
 
 //// [alwaysStrictModule6.js]
 "use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
 // Targeting ES5
 exports.a = 1;

tests/baselines/reference/ambientDeclarationsExternal.js

@@ -28,6 +28,7 @@ var n: number;
 // Ambient external import declaration referencing ambient external module using top level module name 
 //// [consumer.js]
 "use strict";
+exports.__esModule = true;
 // Ambient external module members are always exported with or without export keyword when module lacks export assignment
 var imp3 = require("equ2");
 var n = imp3.x;

tests/baselines/reference/ambientDeclarationsPatterns.js

@@ -34,6 +34,7 @@ foo(fileText);
 
 //// [user.js]
 "use strict";
+exports.__esModule = true;
 ///<reference path="declarations.d.ts" />
 var foobarbaz_1 = require("foobarbaz");
 foobarbaz_1.foo(foobarbaz_1.baz);

tests/baselines/reference/ambientExternalModuleInsideNonAmbientExternalModule.js

@@ -4,4 +4,5 @@ export declare module "M" { }
 //// [ambientExternalModuleInsideNonAmbientExternalModule.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
+    exports.__esModule = true;
 });

tests/baselines/reference/ambientExternalModuleMerging.js

@@ -19,6 +19,7 @@ declare module "M" {
 //// [ambientExternalModuleMerging_use.js]
 define(["require", "exports", "M"], function (require, exports, M) {
     "use strict";
+    exports.__esModule = true;
     // Should be strings
     var x = M.x;
     var y = M.y;

tests/baselines/reference/ambientExternalModuleWithInternalImportDeclaration.js

@@ -22,5 +22,6 @@ var c = new A();
 //// [ambientExternalModuleWithInternalImportDeclaration_1.js]
 define(["require", "exports", "M"], function (require, exports, A) {
     "use strict";
+    exports.__esModule = true;
     var c = new A();
 });

tests/baselines/reference/ambientExternalModuleWithoutInternalImportDeclaration.js

@@ -21,5 +21,6 @@ var c = new A();
 //// [ambientExternalModuleWithoutInternalImportDeclaration_1.js]
 define(["require", "exports", "M"], function (require, exports, A) {
     "use strict";
+    exports.__esModule = true;
     var c = new A();
 });

tests/baselines/reference/ambientInsideNonAmbientExternalModule.js

@@ -8,4 +8,5 @@ export declare module M { }
 //// [ambientInsideNonAmbientExternalModule.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
+    exports.__esModule = true;
 });

tests/baselines/reference/ambientNameRestrictions.js

@@ -6,3 +6,4 @@ export declare namespace Foo {
 
 //// [ambientNameRestrictions.js]
 "use strict";
+exports.__esModule = true;

tests/baselines/reference/ambientShorthand.js

@@ -15,6 +15,7 @@ foo(bar, baz, boom);
 
 //// [user.js]
 "use strict";
+exports.__esModule = true;
 ///<reference path="declarations.d.ts"/>
 var jquery_1 = require("jquery");
 var baz = require("fs");

tests/baselines/reference/ambientShorthand_duplicate.js

@@ -14,3 +14,4 @@ import foo from "foo";
 
 //// [user.js]
 "use strict";
+exports.__esModule = true;

tests/baselines/reference/ambientShorthand_merging.js

@@ -16,3 +16,4 @@ import foo, {bar} from "foo";
 
 //// [user.js]
 "use strict";
+exports.__esModule = true;

tests/baselines/reference/ambientShorthand_reExport.js

@@ -18,6 +18,7 @@ x($);
 
 //// [reExportX.js]
 "use strict";
+exports.__esModule = true;
 var jquery_1 = require("jquery");
 exports.x = jquery_1.x;
 //// [reExportAll.js]
@@ -25,9 +26,11 @@ exports.x = jquery_1.x;
 function __export(m) {
     for (var p in m) if (!exports.hasOwnProperty(p)) exports[p] = m[p];
 }
+exports.__esModule = true;
 __export(require("jquery"));
 //// [reExportUser.js]
 "use strict";
+exports.__esModule = true;
 var reExportX_1 = require("./reExportX");
 var $ = require("./reExportAll");
 // '$' is not callable, it is an object.

tests/baselines/reference/amdDependencyComment1.js

@@ -7,5 +7,6 @@ m1.f();
 //// [amdDependencyComment1.js]
 ///<amd-dependency path='bar'/>
 "use strict";
+exports.__esModule = true;
 var m1 = require("m2");
 m1.f();

tests/baselines/reference/amdDependencyComment2.js

@@ -8,5 +8,6 @@ m1.f();
 ///<amd-dependency path='bar'/>
 define(["require", "exports", "m2", "bar"], function (require, exports, m1) {
     "use strict";
+    exports.__esModule = true;
     m1.f();
 });

tests/baselines/reference/amdDependencyCommentName1.js

@@ -7,5 +7,6 @@ m1.f();
 //// [amdDependencyCommentName1.js]
 ///<amd-dependency path='bar' name='b'/>
 "use strict";
+exports.__esModule = true;
 var m1 = require("m2");
 m1.f();

tests/baselines/reference/amdDependencyCommentName2.js

@@ -8,5 +8,6 @@ m1.f();
 ///<amd-dependency path='bar' name='b'/>
 define(["require", "exports", "bar", "m2"], function (require, exports, b, m1) {
     "use strict";
+    exports.__esModule = true;
     m1.f();
 });

tests/baselines/reference/amdDependencyCommentName3.js

@@ -12,5 +12,6 @@ m1.f();
 ///<amd-dependency path='goo' name='c'/>
 define(["require", "exports", "bar", "goo", "m2", "foo"], function (require, exports, b, c, m1) {
     "use strict";
+    exports.__esModule = true;
     m1.f();
 });

tests/baselines/reference/amdDependencyCommentName4.js

@@ -27,6 +27,7 @@ import "unaliasedModule2";
 ///<amd-dependency path='unaliasedModule4'/>
 define(["require", "exports", "aliasedModule5", "aliasedModule6", "aliasedModule1", "aliasedModule2", "aliasedModule3", "aliasedModule4", "unaliasedModule3", "unaliasedModule4", "unaliasedModule1", "unaliasedModule2"], function (require, exports, n1, n2, r1, aliasedModule2_1, aliasedModule3_1, ns) {
     "use strict";
+    exports.__esModule = true;
     r1;
     aliasedModule2_1.p1;
     aliasedModule3_1["default"];

tests/baselines/reference/amdImportAsPrimaryExpression.js

@@ -15,6 +15,7 @@ if(foo.E1.A === 0){
 //// [foo_0.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
+    exports.__esModule = true;
     var E1;
     (function (E1) {
         E1[E1["A"] = 0] = "A";
@@ -25,6 +26,7 @@ define(["require", "exports"], function (require, exports) {
 //// [foo_1.js]
 define(["require", "exports", "./foo_0"], function (require, exports, foo) {
     "use strict";
+    exports.__esModule = true;
     if (foo.E1.A === 0) {
         // Should cause runtime import - interesting optimization possibility, as gets inlined to 0.
     }

tests/baselines/reference/amdImportNotAsPrimaryExpression.js

@@ -34,6 +34,7 @@ var e: number = <foo.E1>0;
 //// [foo_0.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
+    exports.__esModule = true;
     var C1 = (function () {
         function C1() {
             this.m1 = 42;
@@ -52,6 +53,7 @@ define(["require", "exports"], function (require, exports) {
 //// [foo_1.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
+    exports.__esModule = true;
     var i;
     var x = {};
     var y = false;

tests/baselines/reference/anonymousDefaultExportsAmd.js

@@ -9,15 +9,15 @@ export default function() {}
 //// [a.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
+    Object.defineProperty(exports, "__esModule", { value: true });
     class default_1 {
     }
-    Object.defineProperty(exports, "__esModule", { value: true });
     exports.default = default_1;
 });
 //// [b.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    function default_1() { }
     Object.defineProperty(exports, "__esModule", { value: true });
+    function default_1() { }
     exports.default = default_1;
 });

tests/baselines/reference/anonymousDefaultExportsCommonjs.js

@@ -8,12 +8,12 @@ export default function() {}
 
 //// [a.js]
 "use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
 class default_1 {
 }
-Object.defineProperty(exports, "__esModule", { value: true });
 exports.default = default_1;
 //// [b.js]
 "use strict";
-function default_1() { }
 Object.defineProperty(exports, "__esModule", { value: true });
+function default_1() { }
 exports.default = default_1;

tests/baselines/reference/anonymousDefaultExportsUmd.js

@@ -17,9 +17,9 @@ export default function() {}
     }
 })(function (require, exports) {
     "use strict";
+    Object.defineProperty(exports, "__esModule", { value: true });
     class default_1 {
     }
-    Object.defineProperty(exports, "__esModule", { value: true });
     exports.default = default_1;
 });
 //// [b.js]
@@ -33,7 +33,7 @@ export default function() {}
     }
 })(function (require, exports) {
     "use strict";
-    function default_1() { }
     Object.defineProperty(exports, "__esModule", { value: true });
+    function default_1() { }
     exports.default = default_1;
 });

tests/baselines/reference/asOperator4.js

@@ -14,10 +14,12 @@ import { foo } from './foo';
 
 //// [foo.js]
 "use strict";
+exports.__esModule = true;
 function foo() { }
 exports.foo = foo;
 //// [bar.js]
 "use strict";
+exports.__esModule = true;
 var foo_1 = require("./foo");
 // These should emit identically
 foo_1.foo;

tests/baselines/reference/asyncAwaitIsolatedModules_es5.js

@@ -77,6 +77,7 @@ var __generator = (this && this.__generator) || function (thisArg, body) {
     }
 };
 var _this = this;
+Object.defineProperty(exports, "__esModule", { value: true });
 var missing_1 = require("missing");
 function f0() {
     return __awaiter(this, void 0, void 0, function () { return __generator(this, function (_a) {

tests/baselines/reference/asyncImportedPromise_es5.js

@@ -21,6 +21,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
+Object.defineProperty(exports, "__esModule", { value: true });
 var Task = (function (_super) {
     __extends(Task, _super);
     function Task() {
@@ -66,6 +67,7 @@ var __generator = (this && this.__generator) || function (thisArg, body) {
         if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
     }
 };
+Object.defineProperty(exports, "__esModule", { value: true });
 var task_1 = require("./task");
 var Test = (function () {
     function Test() {

tests/baselines/reference/asyncImportedPromise_es6.js

@@ -11,6 +11,7 @@ class Test {
 
 //// [task.js]
 "use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
 class Task extends Promise {
 }
 exports.Task = Task;
@@ -24,6 +25,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
         step((generator = generator.apply(thisArg, _arguments || [])).next());
     });
 };
+Object.defineProperty(exports, "__esModule", { value: true });
 class Test {
     example() {
         return __awaiter(this, void 0, void 0, function* () { return; });

tests/baselines/reference/augmentExportEquals1.js

@@ -28,9 +28,11 @@ define(["require", "exports"], function (require, exports) {
 //// [file2.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
+    exports.__esModule = true;
 });
 //// [file3.js]
 define(["require", "exports", "./file2"], function (require, exports) {
     "use strict";
+    exports.__esModule = true;
     var a; // should not work
 });

tests/baselines/reference/augmentExportEquals1_1.js

@@ -25,9 +25,11 @@ let a: x.A; // should not work
 //// [file2.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
+    exports.__esModule = true;
 });
 //// [file3.js]
 define(["require", "exports", "file2"], function (require, exports) {
     "use strict";
+    exports.__esModule = true;
     var a; // should not work
 });

tests/baselines/reference/augmentExportEquals2.js

@@ -27,9 +27,11 @@ define(["require", "exports"], function (require, exports) {
 //// [file2.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
+    exports.__esModule = true;
 });
 //// [file3.js]
 define(["require", "exports", "./file2"], function (require, exports) {
     "use strict";
+    exports.__esModule = true;
     var a; // should not work
 });

tests/baselines/reference/augmentExportEquals2_1.js

@@ -25,9 +25,11 @@ let a: x.A; // should not work
 //// [file2.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
+    exports.__esModule = true;
 });
 //// [file3.js]
 define(["require", "exports", "file2"], function (require, exports) {
     "use strict";
+    exports.__esModule = true;
     var a; // should not work
 });

tests/baselines/reference/augmentExportEquals3.js

@@ -36,11 +36,13 @@ define(["require", "exports"], function (require, exports) {
 //// [file2.js]
 define(["require", "exports", "./file1"], function (require, exports, x) {
     "use strict";
+    exports.__esModule = true;
     x.b = 1;
 });
 //// [file3.js]
 define(["require", "exports", "./file1", "./file2"], function (require, exports, x) {
     "use strict";
+    exports.__esModule = true;
     var a;
     var b = x.b;
 });

tests/baselines/reference/augmentExportEquals3_1.js

@@ -30,11 +30,13 @@ let b = x.b;
 //// [file2.js]
 define(["require", "exports", "file1"], function (require, exports, x) {
     "use strict";
+    exports.__esModule = true;
     x.b = 1;
 });
 //// [file3.js]
 define(["require", "exports", "file1", "file2"], function (require, exports, x) {
     "use strict";
+    exports.__esModule = true;
     var a;
     var b = x.b;
 });

tests/baselines/reference/augmentExportEquals4.js

@@ -40,11 +40,13 @@ define(["require", "exports"], function (require, exports) {
 //// [file2.js]
 define(["require", "exports", "./file1"], function (require, exports, x) {
     "use strict";
+    exports.__esModule = true;
     x.b = 1;
 });
 //// [file3.js]
 define(["require", "exports", "./file1", "./file2"], function (require, exports, x) {
     "use strict";
+    exports.__esModule = true;
     var a;
     var b = x.b;
 });

tests/baselines/reference/augmentExportEquals4_1.js

@@ -31,11 +31,13 @@ let b = x.b;
 //// [file2.js]
 define(["require", "exports", "file1"], function (require, exports, x) {
     "use strict";
+    exports.__esModule = true;
     x.b = 1;
 });
 //// [file3.js]
 define(["require", "exports", "file1", "file2"], function (require, exports, x) {
     "use strict";
+    exports.__esModule = true;
     var a;
     var b = x.b;
 });

tests/baselines/reference/augmentExportEquals5.js

@@ -85,10 +85,12 @@ const y = x.id;
 //// [augmentation.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
+    exports.__esModule = true;
 });
 //// [consumer.js]
 define(["require", "exports", "./augmentation"], function (require, exports) {
     "use strict";
+    exports.__esModule = true;
     var x;
     var y = x.id;
 });

tests/baselines/reference/augmentExportEquals6.js

@@ -52,11 +52,13 @@ define(["require", "exports"], function (require, exports) {
 //// [file2.js]
 define(["require", "exports", "./file1"], function (require, exports, x) {
     "use strict";
+    exports.__esModule = true;
     x.B.b = 1;
 });
 //// [file3.js]
 define(["require", "exports", "./file1", "./file2"], function (require, exports, x) {
     "use strict";
+    exports.__esModule = true;
     var a;
     var b = a.a;
     var c = x.B.b;

tests/baselines/reference/augmentExportEquals6_1.js

@@ -29,10 +29,12 @@ let b = a.a;
 //// [file2.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
+    exports.__esModule = true;
 });
 //// [file3.js]
 define(["require", "exports", "file2"], function (require, exports) {
     "use strict";
+    exports.__esModule = true;
     var a;
     var b = a.a;
 });

tests/baselines/reference/augmentedTypesExternalModule1.js

@@ -6,6 +6,7 @@ module c5 { } // should be ok everywhere
 //// [augmentedTypesExternalModule1.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
+    exports.__esModule = true;
     exports.a = 1;
     var c5 = (function () {
         function c5() {

tests/baselines/reference/badExternalModuleReference.js

@@ -9,4 +9,5 @@ export declare var a: {
 //// [badExternalModuleReference.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
+    exports.__esModule = true;
 });

tests/baselines/reference/bangInModuleName.js

@@ -21,4 +21,5 @@ import * as http from 'intern/dojo/node!http';
 /// <reference path="a.d.ts"/>
 define(["require", "exports"], function (require, exports) {
     "use strict";
+    exports.__esModule = true;
 });

tests/baselines/reference/cacheResolutions.js

@@ -13,15 +13,18 @@ export let x = 1;
 //// [app.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
+    exports.__esModule = true;
     exports.x = 1;
 });
 //// [lib1.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
+    exports.__esModule = true;
     exports.x = 1;
 });
 //// [lib2.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
+    exports.__esModule = true;
     exports.x = 1;
 });

tests/baselines/reference/cachedModuleResolution1.js

@@ -12,5 +12,7 @@ import {x} from "foo";
 
 //// [app.js]
 "use strict";
+exports.__esModule = true;
 //// [lib.js]
 "use strict";
+exports.__esModule = true;

tests/baselines/reference/cachedModuleResolution2.js

@@ -13,5 +13,7 @@ import {x} from "foo";
 
 //// [lib.js]
 "use strict";
+exports.__esModule = true;
 //// [app.js]
 "use strict";
+exports.__esModule = true;

tests/baselines/reference/cachedModuleResolution3.js

@@ -12,5 +12,7 @@ import {x} from "foo";
 
 //// [app.js]
 "use strict";
+exports.__esModule = true;
 //// [lib.js]
 "use strict";
+exports.__esModule = true;

tests/baselines/reference/cachedModuleResolution4.js

@@ -13,5 +13,7 @@ import {x} from "foo";
 
 //// [lib.js]
 "use strict";
+exports.__esModule = true;
 //// [app.js]
 "use strict";
+exports.__esModule = true;

tests/baselines/reference/cachedModuleResolution5.js

@@ -12,5 +12,7 @@ import {x} from "foo";
 
 //// [app.js]
 "use strict";
+exports.__esModule = true;
 //// [lib.js]
 "use strict";
+exports.__esModule = true;

tests/baselines/reference/cachedModuleResolution6.js

@@ -9,5 +9,7 @@ import {x} from "foo";
 
 //// [app.js]
 "use strict";
+exports.__esModule = true;
 //// [lib.js]
 "use strict";
+exports.__esModule = true;

tests/baselines/reference/cachedModuleResolution7.js

@@ -10,5 +10,7 @@ import {x} from "foo";
 
 //// [lib.js]
 "use strict";
+exports.__esModule = true;
 //// [app.js]
 "use strict";
+exports.__esModule = true;

tests/baselines/reference/cachedModuleResolution8.js

@@ -9,5 +9,7 @@ import {x} from "foo";
 
 //// [app.js]
 "use strict";
+exports.__esModule = true;
 //// [lib.js]
 "use strict";
+exports.__esModule = true;

tests/baselines/reference/cachedModuleResolution9.js

@@ -11,5 +11,7 @@ import {x} from "foo";
 
 //// [lib.js]
 "use strict";
+exports.__esModule = true;
 //// [app.js]
 "use strict";
+exports.__esModule = true;

tests/baselines/reference/chainedImportAlias.js

@@ -13,6 +13,7 @@ y.m.foo();
 
 //// [chainedImportAlias_file0.js]
 "use strict";
+exports.__esModule = true;
 var m;
 (function (m) {
     function foo() { }
@@ -20,6 +21,7 @@ var m;
 })(m = exports.m || (exports.m = {}));
 //// [chainedImportAlias_file1.js]
 "use strict";
+exports.__esModule = true;
 var x = require("./chainedImportAlias_file0");
 var y = x;
 y.m.foo();

tests/baselines/reference/circularReference.js

@@ -35,6 +35,7 @@ export module M1 {
 
 //// [foo1.js]
 "use strict";
+exports.__esModule = true;
 var foo2 = require("./foo2");
 var M1;
 (function (M1) {
@@ -50,6 +51,7 @@ var M1;
 })(M1 = exports.M1 || (exports.M1 = {}));
 //// [foo2.js]
 "use strict";
+exports.__esModule = true;
 var foo1 = require("./foo1");
 var M1;
 (function (M1) {

tests/baselines/reference/circularReferenceInImport.js

@@ -17,6 +17,7 @@ export function foo() {
 
 //// [app.js]
 "use strict";
+exports.__esModule = true;
 function foo() {
     return new Object();
 }

tests/baselines/reference/classExtendsAcrossFiles.js

@@ -31,6 +31,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
+Object.defineProperty(exports, "__esModule", { value: true });
 var a_1 = require("./a");
 exports.b = {
     f: function () {
@@ -61,6 +62,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
+Object.defineProperty(exports, "__esModule", { value: true });
 var b_1 = require("./b");
 exports.a = {
     f: function () {

tests/baselines/reference/classMemberInitializerWithLamdaScoping3.js

@@ -21,6 +21,7 @@ export class Test1 {
 var field1;
 //// [classMemberInitializerWithLamdaScoping3_1.js]
 "use strict";
+exports.__esModule = true;
 var Test1 = (function () {
     function Test1(field1) {
         this.field1 = field1;

tests/baselines/reference/classMemberInitializerWithLamdaScoping4.js

@@ -17,8 +17,10 @@ export class Test1 {
 
 //// [classMemberInitializerWithLamdaScoping3_0.js]
 "use strict";
+exports.__esModule = true;
 //// [classMemberInitializerWithLamdaScoping3_1.js]
 "use strict";
+exports.__esModule = true;
 var Test1 = (function () {
     function Test1(field1) {
         this.field1 = field1;

tests/baselines/reference/collisionExportsRequireAndAlias.js

@@ -20,6 +20,7 @@ export function foo2() {
 //// [collisionExportsRequireAndAlias_file1.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
+    exports.__esModule = true;
     function bar() {
     }
     exports.bar = bar;
@@ -27,6 +28,7 @@ define(["require", "exports"], function (require, exports) {
 //// [collisionExportsRequireAndAlias_file3333.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
+    exports.__esModule = true;
     function bar2() {
     }
     exports.bar2 = bar2;
@@ -34,6 +36,7 @@ define(["require", "exports"], function (require, exports) {
 //// [collisionExportsRequireAndAlias_file2.js]
 define(["require", "exports", "collisionExportsRequireAndAlias_file1", "collisionExportsRequireAndAlias_file3333"], function (require, exports, require, exports) {
     "use strict";
+    exports.__esModule = true;
     function foo() {
         require.bar();
     }

tests/baselines/reference/collisionExportsRequireAndAmbientClass.js

@@ -40,6 +40,7 @@ module m4 {
 //// [collisionExportsRequireAndAmbientClass_externalmodule.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
+    exports.__esModule = true;
     var m2;
     (function (m2) {
     })(m2 || (m2 = {}));

tests/baselines/reference/collisionExportsRequireAndAmbientEnum.js

@@ -63,6 +63,7 @@ module m4 {
 //// [collisionExportsRequireAndAmbientEnum_externalmodule.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
+    exports.__esModule = true;
     var m2;
     (function (m2) {
     })(m2 || (m2 = {}));

tests/baselines/reference/collisionExportsRequireAndAmbientFunction.js

@@ -16,6 +16,7 @@ module m2 {
 //// [collisionExportsRequireAndAmbientFunction.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
+    exports.__esModule = true;
     var m2;
     (function (m2) {
         var a = 10;

tests/baselines/reference/collisionExportsRequireAndAmbientModule.js

@@ -97,6 +97,7 @@ module m4 {
 //// [collisionExportsRequireAndAmbientModule_externalmodule.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
+    exports.__esModule = true;
     function foo() {
         return null;
     }

tests/baselines/reference/collisionExportsRequireAndAmbientVar.js

@@ -29,6 +29,7 @@ module m4 {
 //// [collisionExportsRequireAndAmbientVar_externalmodule.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
+    exports.__esModule = true;
     var m2;
     (function (m2) {
         var a = 10;

tests/baselines/reference/collisionExportsRequireAndClass.js

@@ -39,6 +39,7 @@ module m4 {
 //// [collisionExportsRequireAndClass_externalmodule.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
+    exports.__esModule = true;
     var require = (function () {
         function require() {
         }

tests/baselines/reference/collisionExportsRequireAndEnum.js

@@ -63,6 +63,7 @@ module m4 {
 //// [collisionExportsRequireAndEnum_externalmodule.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
+    exports.__esModule = true;
     var require;
     (function (require) {
         require[require["_thisVal1"] = 0] = "_thisVal1";

tests/baselines/reference/collisionExportsRequireAndFunction.js

@@ -25,6 +25,7 @@ module m2 {
 //// [collisionExportsRequireAndFunction.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
+    exports.__esModule = true;
     function exports() {
         return 1;
     }

tests/baselines/reference/collisionExportsRequireAndInternalModuleAlias.js

@@ -25,6 +25,7 @@ module m2 {
 //// [collisionExportsRequireAndInternalModuleAlias.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
+    exports.__esModule = true;
     var m;
     (function (m) {
         var c = (function () {

tests/baselines/reference/collisionExportsRequireAndModule.js

@@ -94,6 +94,7 @@ module m4 {
 //// [collisionExportsRequireAndModule_externalmodule.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
+    exports.__esModule = true;
     var require;
     (function (require) {
         var C = (function () {

tests/baselines/reference/collisionExportsRequireAndUninstantiatedModule.js

@@ -17,6 +17,7 @@ export function foo2(): exports.I {
 //// [collisionExportsRequireAndUninstantiatedModule.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
+    exports.__esModule = true;
     function foo() {
         return null;
     }

tests/baselines/reference/collisionExportsRequireAndVar.js

@@ -29,6 +29,7 @@ module m4 {
 //// [collisionExportsRequireAndVar_externalmodule.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
+    exports.__esModule = true;
     function foo() {
     }
     exports.foo = foo;

tests/baselines/reference/commentOnExportEnumDeclaration.js

@@ -8,6 +8,7 @@ export enum Color {
 
 //// [commentOnExportEnumDeclaration.js]
 "use strict";
+exports.__esModule = true;
 /**
  * comment
  */