breaking: Migrate to ESM only.

.config/beemo.ts

@@ -12,4 +12,7 @@ export default {
 			},
 		],
 	],
+	settings: {
+		esm: true,
+	},
 };

.gitignore

@@ -15,6 +15,7 @@ coverage/
 dts/
 esm/
 lib/
+mjs/
 node_modules/
 
 # Custom

babel.config.js

@@ -1,3 +1,5 @@
+process.env.PACKEMON_FORMAT = 'mjs';
+
 const { createRootConfig } = require('packemon/babel');
 
 module.exports = createRootConfig();

optimal/CHANGELOG.md

@@ -9,6 +9,7 @@ The biggest change is that predicates are now known as schemas. For the purpose
 changelog will use the new verbiage, but may affect previous APIs.
 
 - Dropped Node.js v10 support. Minimum requirement v12.17.
+- Updated to ECMAScript modules, and now publishes `.mjs` for Node.js, and ESM `.js` for browsers.
 - Updated `optimal()` to no longer accept the object to validate and build as the 1st argument. Instead a `validate()` function is returned, in which that object should be passed to. Because of this change, TypeScript types are more powerful and accurate.
 - Updated the API to be immutable, so each chained method will return a new schema instance.
 - Updated `array()` to no longer accept a schema as an argument, use `array().of()` instead.

optimal/package.json

@@ -1,14 +1,15 @@
 {
   "name": "optimal",
+  "type": "module",
   "version": "5.0.0-alpha.0",
   "description": "A system for building and validating defined object structures with schemas.",
-  "main": "./lib/node/index.js",
-  "browser": "./lib/browser/index.js",
+  "main": "./mjs/index.mjs",
   "module": "./esm/index.js",
   "types": "./dts/index.d.ts",
   "keywords": [
     "opts",
     "options",
+    "schema",
     "predicate",
     "validator",
     "config",
@@ -30,7 +31,8 @@
   "files": [
     "dts/**/*.d.ts",
     "esm/**/*.{js,map}",
-    "lib/**/*.{js,map}",
+    "mjs/**/*.{js,map}",
+    "mjs/**/*.{mjs,map}",
     "src/**/*.{ts,tsx,json}"
   ],
   "engines": {
@@ -44,12 +46,28 @@
   "packemon": {
     "bundle": true,
     "format": [
-      "lib",
+      "mjs",
       "esm"
     ],
     "platform": [
       "browser",
       "node"
     ]
+  },
+  "devDependencies": {
+    "@jest/globals": "*"
+  },
+  "exports": {
+    "./package.json": "./package.json",
+    ".": {
+      "browser": {
+        "import": "./esm/index.js",
+        "module": "./esm/index.js"
+      },
+      "node": {
+        "import": "./mjs/index.mjs"
+      },
+      "types": "./dts/index.d.ts"
+    }
   }
 }

optimal/tests/schemas/runCommonTests.ts

@@ -1,3 +1,4 @@
+import { jest } from '@jest/globals';
 import { AnySchema, CommonCriterias, DefaultValue, Schema } from '../../src';
 
 interface TestCriterias<S> extends CommonCriterias<S> {
@@ -57,6 +58,7 @@ export function runCommonTests<T>(
 			it('passes the current path and objects to the lazy callback function', () => {
 				const spy = jest.fn().mockReturnValue(defaultValue);
 
+				// @ts-expect-error Ignore type requirement
 				schema = factory(spy) as any;
 				schema.validate(undefined, 'key.deep', {
 					currentObject: { foo: '' },
@@ -223,7 +225,7 @@ export function runCommonTests<T>(
 		});
 
 		it('logs a message when validating', () => {
-			const spy = jest.spyOn(console, 'info').mockImplementation();
+			const spy = jest.spyOn(console, 'info').mockImplementation(() => {});
 
 			schema.deprecate('Migrate away!').validate(value, 'key', {});
 

package.json

@@ -4,7 +4,7 @@
   "scripts": {
     "prepare": "beemo create-config",
     "build": "packemon build --addEngines",
-    "pack": "NODE_ENV=production packemon pack --addEngines --declaration=standard",
+    "pack": "NODE_ENV=production packemon pack --addEngines --addExports --declaration=standard",
     "check": "yarn run type && yarn run test && yarn run lint",
     "clean": "packemon clean",
     "coverage": "yarn run test --coverage",
@@ -21,9 +21,9 @@
   "devDependencies": {
     "@beemo/cli": "^2.0.1",
     "@beemo/core": "^2.0.2",
-    "@beemo/dev": "^1.5.0",
-    "@types/node": "^15.6.1",
-    "packemon": "^1.4.1"
+    "@beemo/dev": "^1.6.0",
+    "@types/node": "^15.14.9",
+    "packemon": "^1.4.2"
   },
   "workspaces": [
     "optimal/"