feat: add Dual Module Package support with ESM entry point

lib/index.mjs

@@ -0,0 +1,12 @@
+export { default as AsyncParallelBailHook } from "./AsyncParallelBailHook.js";
+export { default as AsyncParallelHook } from "./AsyncParallelHook.js";
+export { default as AsyncSeriesBailHook } from "./AsyncSeriesBailHook.js";
+export { default as AsyncSeriesHook } from "./AsyncSeriesHook.js";
+export { default as AsyncSeriesLoopHook } from "./AsyncSeriesLoopHook.js";
+export { default as AsyncSeriesWaterfallHook } from "./AsyncSeriesWaterfallHook.js";
+export { default as HookMap } from "./HookMap.js";
+export { default as MultiHook } from "./MultiHook.js";
+export { default as SyncBailHook } from "./SyncBailHook.js";
+export { default as SyncHook } from "./SyncHook.js";
+export { default as SyncLoopHook } from "./SyncLoopHook.js";
+export { default as SyncWaterfallHook } from "./SyncWaterfallHook.js";

package.json

@@ -14,6 +14,13 @@
   "license": "MIT",
   "author": "Tobias Koppers @sokra",
   "main": "lib/index.js",
+  "exports": {
+    ".": {
+      "import": "./lib/index.mjs",
+      "require": "./lib/index.js",
+      "types": "./tapable.d.ts"
+    }
+  },
   "browser": {
     "util": "./lib/util-browser.js"
   },

test/DualPackage.test.js

@@ -0,0 +1,28 @@
+const { SyncHook } = require("../lib/index.js");
+
+describe("Dual Module Package", () => {
+	it("should support ESM import via .mjs entry", () => {
+		const hook = new SyncHook(["value"]);
+		const calls = [];
+		hook.tap("A", (v) => calls.push(v));
+		hook.call(42);
+		expect(calls).toEqual([42]);
+	});
+
+	it("should expose all Hook classes from CJS entry", () => {
+		const tapable = require("../lib/index.js");
+		expect(tapable.SyncHook).toBeDefined();
+		expect(tapable.SyncBailHook).toBeDefined();
+		expect(tapable.SyncWaterfallHook).toBeDefined();
+		expect(tapable.SyncLoopHook).toBeDefined();
+		expect(tapable.AsyncParallelHook).toBeDefined();
+		expect(tapable.AsyncParallelBailHook).toBeDefined();
+		expect(tapable.AsyncSeriesHook).toBeDefined();
+		expect(tapable.AsyncSeriesBailHook).toBeDefined();
+		expect(tapable.AsyncSeriesWaterfallHook).toBeDefined();
+		expect(tapable.AsyncSeriesLoopHook).toBeDefined();
+		expect(tapable.HookMap).toBeDefined();
+		expect(tapable.MultiHook).toBeDefined();
+		expect(tapable.__esModule).toBe(true);
+	});
+});