feat: native ES Module support for Node.js

See: https://nodejs.org/docs/latest-v12.x/api/esm.html#esm_dual_commonjs_es_module_packages

Closes #342

.local/wrapper.mjs

@@ -0,0 +1 @@
+../wrapper.mjs

examples/node-esmodules/README.md

@@ -0,0 +1,6 @@
+# uuid example Node.js ESModules
+
+```
+npm install
+npm test
+```

examples/node-esmodules/example.js

@@ -0,0 +1,43 @@
+import { v1 as uuidv1, v4 as uuidv4, v3 as uuidv3, v5 as uuidv5 } from 'uuid';
+import * as uuid from 'uuid';
+
+console.log('uuidv1()', uuidv1());
+
+console.log('uuidv4()', uuidv4());
+
+// ... using predefined DNS namespace (for domain names)
+console.log('uuidv3() DNS', uuidv3('hello.example.com', uuidv3.DNS));
+
+// ... using predefined URL namespace (for, well, URLs)
+console.log('uuidv3() URL', uuidv3('http://example.com/hello', uuidv3.URL));
+
+// ... using a custom namespace
+//
+// Note: Custom namespaces should be a UUID string specific to your application!
+// E.g. the one here was generated using this modules `uuid` CLI.
+const MY_NAMESPACE = '55238d15-c926-4598-b49d-cf4e913ba13c';
+console.log('uuidv3() MY_NAMESPACE', uuidv3('Hello, World!', MY_NAMESPACE));
+
+// ... using predefined DNS namespace (for domain names)
+console.log('uuidv5() DNS', uuidv5('hello.example.com', uuidv5.DNS));
+
+// ... using predefined URL namespace (for, well, URLs)
+console.log('uuidv5() URL', uuidv5('http://example.com/hello', uuidv5.URL));
+
+// ... using a custom namespace
+//
+// Note: Custom namespaces should be a UUID string specific to your application!
+// E.g. the one here was generated using this modules `uuid` CLI.
+// const MY_NAMESPACE = '1b671a64-40d5-491e-99b0-da01ff1f3341';
+console.log('uuidv5() MY_NAMESPACE', uuidv5('Hello, World!', MY_NAMESPACE));
+
+console.log('Same with default export');
+
+console.log('uuid.v1()', uuid.v1());
+console.log('uuid.v4()', uuid.v4());
+console.log('uuid.v3() DNS', uuid.v3('hello.example.com', uuid.v3.DNS));
+console.log('uuid.v3() URL', uuid.v3('http://example.com/hello', uuid.v3.URL));
+console.log('uuid.v3() MY_NAMESPACE', uuid.v3('Hello, World!', MY_NAMESPACE));
+console.log('uuid.v5() DNS', uuid.v5('hello.example.com', uuid.v5.DNS));
+console.log('uuid.v5() URL', uuid.v5('http://example.com/hello', uuid.v5.URL));
+console.log('uuid.v5() MY_NAMESPACE', uuid.v5('Hello, World!', MY_NAMESPACE));

examples/node-esmodules/package.json

@@ -0,0 +1,12 @@
+{
+  "name": "uuid-example-node-esmodules",
+  "version": "0.0.0",
+  "private": true,
+  "type": "module",
+  "scripts": {
+    "test": "node --experimental-modules example.js"
+  },
+  "dependencies": {
+    "uuid": "file:../../.local"
+  }
+}

package.json

@@ -18,6 +18,10 @@
   },
   "sideEffects": false,
   "main": "dist/index.js",
+  "exports": {
+    "require": "dist/index.js",
+    "import": "./wrapper.mjs"
+  },
   "module": "dist/esm-node/index.js",
   "browser": {
     "./dist/md5.js": "./dist/md5-browser.js",
@@ -34,7 +38,8 @@
     "v1.js",
     "v3.js",
     "v4.js",
-    "v5.js"
+    "v5.js",
+    "wrapper.mjs"
   ],
   "devDependencies": {
     "@babel/cli": "7.8.4",

wrapper.mjs

@@ -0,0 +1,5 @@
+import uuid from './dist/index.js';
+export const v1 = uuid.v1;
+export const v3 = uuid.v3;
+export const v4 = uuid.v4;
+export const v5 = uuid.v5;