Add native ESM support

package.json

@@ -2,18 +2,27 @@
   "name": "@wojtekmaj/react-datetimerange-picker",
   "version": "5.3.0",
   "description": "A datetime range picker for your React app.",
-  "main": "dist/cjs/index.js",
-  "module": "dist/esm/index.js",
-  "source": "src/index.ts",
-  "types": "dist/cjs/index.d.ts",
+  "type": "module",
   "sideEffects": [
     "*.css"
   ],
+  "main": "./dist/cjs/index.js",
+  "module": "./dist/esm/index.js",
+  "source": "./src/index.ts",
+  "types": "./dist/cjs/index.d.ts",
+  "exports": {
+    ".": {
+      "import": "./dist/esm/index.js",
+      "require": "./dist/cjs/index.js"
+    },
+    "./dist/DateTimeRangePicker.css": "./dist/DateTimeRangePicker.css"
+  },
   "scripts": {
     "build": "yarn build-js && yarn copy-styles",
-    "build-js": "yarn build-js-esm && yarn build-js-cjs",
+    "build-js": "yarn build-js-esm && yarn build-js-cjs && yarn build-js-cjs-package",
     "build-js-esm": "tsc --project tsconfig.build.json --outDir dist/esm --module esnext",
     "build-js-cjs": "tsc --project tsconfig.build.json --outDir dist/cjs --module commonjs",
+    "build-js-cjs-package": "echo '{\n  \"type\": \"commonjs\"\n}' > dist/cjs/package.json",
     "clean": "rimraf dist",
     "copy-styles": "cpy 'src/**/*.css' dist",
     "lint": "eslint . --ext .js,.jsx,.ts,.tsx",
@@ -23,7 +32,7 @@
     "test": "yarn lint && yarn tsc && yarn prettier && yarn unit",
     "tsc": "tsc --noEmit",
     "unit": "vitest",
-    "watch": "yarn build-js-esm --watch & yarn build-js-cjs --watch & nodemon --watch src --ext css --exec \"yarn copy-styles\""
+    "watch": "yarn build-js-esm --watch & yarn build-js-cjs --watch & yarn build-js-cjs-package & nodemon --watch src --ext css --exec \"yarn copy-styles\""
   },
   "keywords": [
     "calendar",

src/DateTimeRangePicker.spec.tsx

@@ -3,7 +3,7 @@ import React from 'react';
 import { act, fireEvent, render, waitFor, waitForElementToBeRemoved } from '@testing-library/react';
 import userEvent from '@testing-library/user-event';
 
-import DateTimeRangePicker from './DateTimeRangePicker';
+import DateTimeRangePicker from './DateTimeRangePicker.js';
 
 async function waitForElementToBeRemovedOrHidden(callback: () => HTMLElement | null) {
   const element = callback();

src/DateTimeRangePicker.tsx

@@ -11,10 +11,17 @@ import Fit from 'react-fit';
 
 import DateTimeInput from 'react-datetime-picker/dist/cjs/DateTimeInput';
 
-import { isMaxDate, isMinDate, rangeOf } from './shared/propTypes';
+import { isMaxDate, isMinDate, rangeOf } from './shared/propTypes.js';
 
 import type { ReactNodeArray } from 'prop-types';
-import type { ClassName, CloseReason, Detail, LooseValue, OpenReason, Value } from './shared/types';
+import type {
+  ClassName,
+  CloseReason,
+  Detail,
+  LooseValue,
+  OpenReason,
+  Value,
+} from './shared/types.js';
 
 const baseClassName = 'react-datetimerange-picker';
 const outsideActionEvents = ['mousedown', 'focusin', 'touchstart'] as const;

src/index.ts

@@ -1,6 +1,6 @@
-import DateTimeRangePicker from './DateTimeRangePicker';
+import DateTimeRangePicker from './DateTimeRangePicker.js';
 
-export type { DateTimeRangePickerProps } from './DateTimeRangePicker';
+export type { DateTimeRangePickerProps } from './DateTimeRangePicker.js';
 
 export { DateTimeRangePicker };
 

src/shared/propTypes.ts

@@ -1,7 +1,7 @@
 import PropTypes from 'prop-types';
 
 import type { Requireable, Validator } from 'prop-types';
-import type { Range } from './types';
+import type { Range } from './types.js';
 
 export const isMinDate: Validator<Date | null | undefined> = function isMinDate(
   props,