Don't force module output when targeting ES6

index.ts

@@ -197,7 +197,6 @@ function ensureTypeScriptInstance(loaderOptions: LoaderOptions, loader: any): {
     };
 
     var compilerOptions: typescript.CompilerOptions = {
-        module: 1 /* CommonJS */
     };
 
     // Load any available tsconfig.json file
@@ -275,14 +274,14 @@ function ensureTypeScriptInstance(loaderOptions: LoaderOptions, loader: any): {
     instance.compilerOptions = objectAssign<typescript.CompilerOptions>(compilerOptions, configParseResult.options);
     filesToLoad = configParseResult.fileNames;
 
-    var libFileName = 'lib.d.ts';
-
-    // Special handling for ES6 targets
-    if (compilerOptions.target == 2 /* ES6 */) {
+    // if `module` is not specified and not using ES6 target, default to CJS module output
+    if (compilerOptions.module == null && compilerOptions.target !== 2 /* ES6 */) {
+        compilerOptions.module = 1 /* CommonJS */
+    }
+    // special handling for TS 1.6 and target: es6
+    else if (compilerCompatible && semver.lt(compiler.version, '1.7.3-0') && compilerOptions.target == 2 /* ES6 */) {
         compilerOptions.module = 0 /* None */;
-        libFileName = 'lib.es6.d.ts';
     }
-    libFileName = path.join(path.dirname(require.resolve(loaderOptions.compiler)), libFileName);
 
     if (loaderOptions.transpileOnly) {
         // quick return for transpiling
@@ -297,10 +296,6 @@ function ensureTypeScriptInstance(loaderOptions: LoaderOptions, loader: any): {
         return { instance: instances[loaderOptions.instance] = { compiler, compilerOptions, loaderOptions, files }};
     }
 
-    if (!compilerOptions.noLib) {
-        filesToLoad.push(libFileName);
-    }
-
     // Load initial files (core lib files, any files specified in tsconfig.json)
     filesToLoad.forEach(filePath => {
         filePath = path.normalize(filePath);
@@ -356,7 +351,7 @@ function ensureTypeScriptInstance(loaderOptions: LoaderOptions, loader: any): {
         },
         getCurrentDirectory: () => process.cwd(),
         getCompilationSettings: () => compilerOptions,
-        getDefaultLibFileName: options => libFileName,
+        getDefaultLibFileName: options => compiler.getDefaultLibFilePath(options),
         getNewLine: () => newLine,
         log: log,
         resolveModuleNames: (moduleNames: string[], containingFile: string) => {

test/es6withCJS/app.ts

@@ -0,0 +1 @@
+export default 'a';

test/es6withCJS/expectedOutput-1.6/output.txt

@@ -0,0 +1,6 @@
+
+ERROR in ./.test/es6withCJS/app.ts
+Module parse failed: index.js!app.ts Line 1: Unexpected token
+You may need an appropriate loader to handle this file type.
+| export default 'a';
+| 

test/es6withCJS/expectedOutput-1.7/bundle.js

@@ -0,0 +1,51 @@
+/******/ (function(modules) { // webpackBootstrap
+/******/ 	// The module cache
+/******/ 	var installedModules = {};
+
+/******/ 	// The require function
+/******/ 	function __webpack_require__(moduleId) {
+
+/******/ 		// Check if module is in cache
+/******/ 		if(installedModules[moduleId])
+/******/ 			return installedModules[moduleId].exports;
+
+/******/ 		// Create a new module (and put it into the cache)
+/******/ 		var module = installedModules[moduleId] = {
+/******/ 			exports: {},
+/******/ 			id: moduleId,
+/******/ 			loaded: false
+/******/ 		};
+
+/******/ 		// Execute the module function
+/******/ 		modules[moduleId].call(module.exports, module, module.exports, __webpack_require__);
+
+/******/ 		// Flag the module as loaded
+/******/ 		module.loaded = true;
+
+/******/ 		// Return the exports of the module
+/******/ 		return module.exports;
+/******/ 	}
+
+
+/******/ 	// expose the modules object (__webpack_modules__)
+/******/ 	__webpack_require__.m = modules;
+
+/******/ 	// expose the module cache
+/******/ 	__webpack_require__.c = installedModules;
+
+/******/ 	// __webpack_public_path__
+/******/ 	__webpack_require__.p = "";
+
+/******/ 	// Load entry module and return exports
+/******/ 	return __webpack_require__(0);
+/******/ })
+/************************************************************************/
+/******/ ([
+/* 0 */
+/***/ function(module, exports) {
+
+	exports.default = 'a';
+
+
+/***/ }
+/******/ ]);

test/es6withCJS/expectedOutput-1.7/output.txt

@@ -0,0 +1,4 @@
+    Asset     Size  Chunks             Chunk Names
+bundle.js  1.41 kB       0  [emitted]  main
+chunk    {0} bundle.js (main) 23 bytes [rendered]
+    [0] ./.test/es6withCJS/app.ts 23 bytes {0} [built]

test/es6withCJS/expectedOutput-1.8/bundle.js

@@ -0,0 +1,53 @@
+/******/ (function(modules) { // webpackBootstrap
+/******/ 	// The module cache
+/******/ 	var installedModules = {};
+
+/******/ 	// The require function
+/******/ 	function __webpack_require__(moduleId) {
+
+/******/ 		// Check if module is in cache
+/******/ 		if(installedModules[moduleId])
+/******/ 			return installedModules[moduleId].exports;
+
+/******/ 		// Create a new module (and put it into the cache)
+/******/ 		var module = installedModules[moduleId] = {
+/******/ 			exports: {},
+/******/ 			id: moduleId,
+/******/ 			loaded: false
+/******/ 		};
+
+/******/ 		// Execute the module function
+/******/ 		modules[moduleId].call(module.exports, module, module.exports, __webpack_require__);
+
+/******/ 		// Flag the module as loaded
+/******/ 		module.loaded = true;
+
+/******/ 		// Return the exports of the module
+/******/ 		return module.exports;
+/******/ 	}
+
+
+/******/ 	// expose the modules object (__webpack_modules__)
+/******/ 	__webpack_require__.m = modules;
+
+/******/ 	// expose the module cache
+/******/ 	__webpack_require__.c = installedModules;
+
+/******/ 	// __webpack_public_path__
+/******/ 	__webpack_require__.p = "";
+
+/******/ 	// Load entry module and return exports
+/******/ 	return __webpack_require__(0);
+/******/ })
+/************************************************************************/
+/******/ ([
+/* 0 */
+/***/ function(module, exports) {
+
+	"use strict";
+	Object.defineProperty(exports, "__esModule", { value: true });
+	exports.default = 'a';
+
+
+/***/ }
+/******/ ]);

test/es6withCJS/expectedOutput-1.8/output.txt

@@ -0,0 +1,4 @@
+    Asset     Size  Chunks             Chunk Names
+bundle.js  1.49 kB       0  [emitted]  main
+chunk    {0} bundle.js (main) 100 bytes [rendered]
+    [0] ./.test/es6withCJS/app.ts 100 bytes {0} [built]

test/es6withCJS/tsconfig.json

@@ -0,0 +1,6 @@
+{
+    "compilerOptions": {
+        "target": "es6",
+        "module": "commonjs"
+    }
+}

test/es6withCJS/webpack.config.js

@@ -0,0 +1,17 @@
+module.exports = {
+    entry: './app.ts',
+    output: {
+        filename: 'bundle.js'
+    },
+    resolve: {
+        extensions: ['', '.ts', '.js']
+    },
+    module: {
+        loaders: [
+            { test: /\.ts$/, loader: 'ts-loader' }
+        ]
+    }
+}
+
+// for test harness purposes only, you would not need this in a normal project
+module.exports.resolveLoader = { alias: { 'ts-loader': require('path').join(__dirname, "../../index.js") } }

test/ignoreDiagnostics/expectedOutput-1.8/output.txt

@@ -4,5 +4,4 @@ chunk    {0} bundle.js (main) 247 bytes [rendered]
     [0] ./.test/ignoreDiagnostics/app.ts 247 bytes {0} [built] [1 error]
 
 ERROR in ./.test/ignoreDiagnostics/app.ts
-(9,5): error TS2322: Type 'string' is not assignable to type 'Number'.
-  Property 'toFixed' is missing in type 'String'.
+(9,5): error TS2322: Type 'string' is not assignable to type 'Number'.