Allow to disable __esModule (#2287)

src/Chunk.ts

@@ -763,6 +763,7 @@ export default class Chunk {
 		const renderOptions: RenderOptions = {
 			compact: options.compact,
 			freeze: options.freeze !== false,
+			esModule: options.esModule !== false,
 			namespaceToStringTag: options.namespaceToStringTag === true,
 			indent: this.indentString,
 			format: options.format

src/finalisers/amd.ts

@@ -71,7 +71,7 @@ export default function amd(
 		options.compact
 	);
 	if (exportBlock) magicString.append(n + n + exportBlock);
-	if (namedExportsMode && hasExports && isEntryModuleFacade)
+	if (namedExportsMode && hasExports && isEntryModuleFacade && options.esModule)
 		magicString.append(`${n}${n}${options.compact ? compactEsModuleExport : esModuleExport}`);
 	if (outro) magicString.append(outro);
 

src/finalisers/cjs.ts

@@ -23,7 +23,7 @@ export default function cjs(
 
 	intro =
 		(options.strict === false ? intro : `'use strict';${n}${n}${intro}`) +
-		(namedExportsMode && hasExports && isEntryModuleFacade
+		(namedExportsMode && hasExports && isEntryModuleFacade && options.esModule
 			? `${options.compact ? compactEsModuleExport : esModuleExport}${n}${n}`
 			: '');
 

src/finalisers/umd.ts

@@ -131,7 +131,7 @@ export default function umd(
 		options.compact
 	);
 	if (exportBlock) magicString.append(n + n + exportBlock);
-	if (namedExportsMode && hasExports)
+	if (namedExportsMode && hasExports && options.esModule)
 		magicString.append(n + n + (options.compact ? compactEsModuleExport : esModuleExport));
 	if (outro) magicString.append(outro);
 

src/rollup/types.d.ts

@@ -254,6 +254,7 @@ export interface OutputOptions {
 	indent?: boolean;
 	strict?: boolean;
 	freeze?: boolean;
+	esModule?: boolean;
 	namespaceToStringTag?: boolean;
 	compact?: boolean;
 

src/utils/mergeOptions.ts

@@ -254,6 +254,7 @@ function getOutputOptions(
 		footer: getOption('footer'),
 		format: format === 'esm' ? 'es' : format,
 		freeze: getOption('freeze'),
+		esModule: getOption('esModule'),
 		globals: getOption('globals'),
 		indent: getOption('indent', true),
 		interop: getOption('interop', true),

src/utils/renderHelpers.ts

@@ -4,6 +4,7 @@ import { Node, StatementNode } from '../ast/nodes/shared/Node';
 export interface RenderOptions {
 	compact: boolean;
 	freeze: boolean;
+	esModule: boolean;
 	namespaceToStringTag: boolean;
 	indent: string;
 	format: string;

test/form/samples/define-es-modules-false/_config.js

@@ -0,0 +1,7 @@
+module.exports = {
+  solo: true,
+	description: 'Not add __esModule property to exports with esModule: false',
+	options: {
+		output: { name: 'foo', esModule: false },
+	}
+};

test/form/samples/define-es-modules-false/_expected/amd.js

@@ -0,0 +1,10 @@
+define(['exports'], function (exports) { 'use strict';
+
+	const make1 = () => {};
+
+	const make2 = () => {};
+
+	exports.make1 = make1;
+	exports.make2 = make2;
+
+});

test/form/samples/define-es-modules-false/_expected/cjs.js

@@ -0,0 +1,8 @@
+'use strict';
+
+const make1 = () => {};
+
+const make2 = () => {};
+
+exports.make1 = make1;
+exports.make2 = make2;

test/form/samples/define-es-modules-false/_expected/es.js

@@ -0,0 +1,5 @@
+const make1 = () => {};
+
+const make2 = () => {};
+
+export { make1, make2 };

test/form/samples/define-es-modules-false/_expected/iife.js

@@ -0,0 +1,13 @@
+var foo = (function (exports) {
+	'use strict';
+
+	const make1 = () => {};
+
+	const make2 = () => {};
+
+	exports.make1 = make1;
+	exports.make2 = make2;
+
+	return exports;
+
+}({}));

test/form/samples/define-es-modules-false/_expected/system.js

@@ -0,0 +1,12 @@
+System.register('foo', [], function (exports, module) {
+	'use strict';
+	return {
+		execute: function () {
+
+			const make1 = exports('make1', () => {});
+
+			const make2 = exports('make2', () => {});
+
+		}
+	};
+});

test/form/samples/define-es-modules-false/_expected/umd.js

@@ -0,0 +1,14 @@
+(function (global, factory) {
+	typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
+	typeof define === 'function' && define.amd ? define(['exports'], factory) :
+	(factory((global.foo = {})));
+}(this, (function (exports) { 'use strict';
+
+	const make1 = () => {};
+
+	const make2 = () => {};
+
+	exports.make1 = make1;
+	exports.make2 = make2;
+
+})));

test/form/samples/define-es-modules-false/main.js

@@ -0,0 +1,3 @@
+export const make1 = () => {};
+
+export const make2 = () => {};