feat!: make SuperJSON esm-only

benchmark.js

@@ -1,5 +1,5 @@
-const Benchmark = require('benchmark');
-const SuperJSON = require('./dist/').default;
+import Benchmark from "benchmark"
+import SuperJSON from "./dist/index.js"
 
 const instances = {
   'toy example': {

package.json

@@ -1,20 +1,17 @@
 {
   "version": "1.13.3",
   "license": "MIT",
-  "main": "dist/index.js",
+  "type": "module",
   "typings": "dist/index.d.ts",
-  "module": "dist/esm/index.js",
-  "files": [
-    "dist",
-    "src"
-  ],
+  "exports": {
+    ".": "./dist/index.js"
+  },
+  "files": ["dist"],
   "engines": {
-    "node": ">=10"
+    "node": ">=16"
   },
   "scripts": {
-    "build": "yarn build:cjs && yarn build:esm",
-    "build:cjs": "tsc",
-    "build:esm": "tsc --module es2015 --outDir dist/esm",
+    "build": "tsc",
     "test": "tsdx test --notify --verbose",
     "lint": "tsdx lint",
     "prepack": "yarn build",

src/accessDeep.test.ts

@@ -1,4 +1,4 @@
-import { setDeep } from './accessDeep';
+import { setDeep } from './accessDeep.js';
 
 describe('setDeep', () => {
   it('correctly sets values in maps', () => {

src/accessDeep.ts

@@ -1,5 +1,5 @@
-import { isMap, isArray, isPlainObject, isSet } from './is';
-import { includes } from './util';
+import { isMap, isArray, isPlainObject, isSet } from './is.js';
+import { includes } from './util.js';
 
 const getNthKey = (value: Map<any, any> | Set<any>, n: number): any => {
   const keys = value.keys();

src/class-registry.ts

@@ -1,5 +1,5 @@
-import { Registry } from './registry';
-import { Class } from './types';
+import { Registry } from './registry.js';
+import { Class } from './types.js';
 
 export interface RegisterOptions {
   identifier?: string;

src/custom-transformer-registry.ts

@@ -1,5 +1,5 @@
-import { JSONValue } from './types';
-import { find } from './util';
+import { JSONValue } from './types.js';
+import { find } from './util.js';
 
 export interface CustomTransfomer<I, O extends JSONValue> {
   name: string;

src/index.test.ts

@@ -3,16 +3,16 @@
 
 import * as fs from 'fs';
 
-import SuperJSON from './';
-import { JSONValue, SuperJSONResult, SuperJSONValue } from './types';
+import SuperJSON from './index.js';
+import { JSONValue, SuperJSONResult, SuperJSONValue } from './types.js';
 import {
   isArray,
   isMap,
   isPlainObject,
   isPrimitive,
   isSet,
   isTypedArray,
-} from './is';
+} from './is.js';
 
 import { ObjectID } from 'mongodb';
 import { Decimal } from 'decimal.js';

src/index.ts

@@ -1,16 +1,16 @@
-import { Class, JSONValue, SuperJSONResult, SuperJSONValue } from './types';
-import { ClassRegistry, RegisterOptions } from './class-registry';
-import { Registry } from './registry';
+import { Class, JSONValue, SuperJSONResult, SuperJSONValue } from './types.js';
+import { ClassRegistry, RegisterOptions } from './class-registry.js';
+import { Registry } from './registry.js';
 import {
   CustomTransfomer,
   CustomTransformerRegistry,
-} from './custom-transformer-registry';
+} from './custom-transformer-registry.js';
 import {
   applyReferentialEqualityAnnotations,
   applyValueAnnotations,
   generateReferentialEqualityAnnotations,
   walker,
-} from './plainer';
+} from './plainer.js';
 import { copy } from 'copy-anything';
 
 export default class SuperJSON {

src/is.test.ts

@@ -12,7 +12,7 @@ import {
   isPlainObject,
   isTypedArray,
   isURL,
-} from './is';
+} from './is.js';
 
 test('Basic true tests', () => {
   expect(isUndefined(undefined)).toBe(true);

src/pathstringifier.test.ts

@@ -1,4 +1,4 @@
-import { parsePath, escapeKey } from './pathstringifier';
+import { parsePath, escapeKey } from './pathstringifier.js';
 
 describe('parsePath', () => {
   it.each([

src/plainer.spec.ts

@@ -1,5 +1,5 @@
-import SuperJSON from '.';
-import { walker } from './plainer';
+import SuperJSON from './index.js';
+import { walker } from './plainer.js';
 
 test('walker', () => {
   expect(

src/plainer.ts

@@ -5,18 +5,18 @@ import {
   isPlainObject,
   isPrimitive,
   isSet,
-} from './is';
-import { escapeKey, stringifyPath } from './pathstringifier';
+} from './is.js';
+import { escapeKey, stringifyPath } from './pathstringifier.js';
 import {
   isInstanceOfRegisteredClass,
   transformValue,
   TypeAnnotation,
   untransformValue,
-} from './transformer';
-import { includes, forEach } from './util';
-import { parsePath } from './pathstringifier';
-import { getDeep, setDeep } from './accessDeep';
-import SuperJSON from '.';
+} from './transformer.js';
+import { includes, forEach } from './util.js';
+import { parsePath } from './pathstringifier.js';
+import { getDeep, setDeep } from './accessDeep.js';
+import SuperJSON from './index.js';
 
 type Tree<T> = InnerNode<T> | Leaf<T>;
 type Leaf<T> = [T];

src/registry.test.ts

@@ -1,5 +1,5 @@
-import { Registry } from './registry';
-import { Class } from './types';
+import { Registry } from './registry.js';
+import { Class } from './types.js';
 
 test('class registry', () => {
   const registry = new Registry<Class>(c => c.name);

src/registry.ts

@@ -1,4 +1,4 @@
-import { DoubleIndexedKV } from './double-indexed-kv';
+import { DoubleIndexedKV } from './double-indexed-kv.js';
 
 export class Registry<T> {
   private kv = new DoubleIndexedKV<string, T>();

src/transformer.ts

@@ -13,9 +13,9 @@ import {
   isTypedArray,
   TypedArrayConstructor,
   isURL,
-} from './is';
-import { findArr } from './util';
-import SuperJSON from '.';
+} from './is.js';
+import { findArr } from './util.js';
+import SuperJSON from './index.js';
 
 export type PrimitiveTypeAnnotation = 'number' | 'undefined' | 'bigint';
 

src/types.ts

@@ -1,5 +1,5 @@
-import { TypeAnnotation } from './transformer';
-import { MinimisedTree, ReferentialEqualityAnnotations } from './plainer';
+import { TypeAnnotation } from './transformer.js';
+import { MinimisedTree, ReferentialEqualityAnnotations } from './plainer.js';
 
 export type Class = { new (...args: any[]): any };
 

tsconfig.json

@@ -2,7 +2,8 @@
   "include": ["src"],
   "exclude": ["**/*.spec.ts", "**/*.test.ts"],
   "compilerOptions": {
-    "module": "CommonJS",
+    "module": "ES6",
+    "moduleResolution": "node",
     "lib": ["esnext"],
     "importHelpers": false,
     "declaration": true,
@@ -14,7 +15,6 @@
     "noUnusedParameters": true,
     "noImplicitReturns": true,
     "noFallthroughCasesInSwitch": true,
-    "moduleResolution": "node",
     "esModuleInterop": true,
     "downlevelIteration": true
   }