Require Node.js 12.20 and move to ESM

.github/workflows/main.yml

@@ -10,13 +10,10 @@ jobs:
       fail-fast: false
       matrix:
         node-version:
-          - 14
-          - 12
-          - 10
-          - 8
+          - 16
     steps:
       - uses: actions/checkout@v2
-      - uses: actions/setup-node@v1
+      - uses: actions/setup-node@v2
         with:
           node-version: ${{ matrix.node-version }}
       - run: npm install

index.d.ts

@@ -1,30 +1,26 @@
-declare namespace monthDays {
-	interface Options {
-		/**
-		Note that the month is zero-index to be consistent with the native date methods.
+export interface Options {
+	/**
+	Note that the month is zero-index to be consistent with the native date methods.
 
-		@default (new Date()).getUTCMonth()
-		*/
-		readonly month?: number;
+	@default (new Date()).getUTCMonth()
+	*/
+	readonly month?: number;
 
-		/**
-		@default (new Date).getUTCFullYear()
-		*/
-		readonly year?: number;
-	}
+	/**
+	@default (new Date).getUTCFullYear()
+	*/
+	readonly year?: number;
 }
 
 /**
 Get the number of days in a month.
 
 @example
 ```
-import monthDays = require('month-days');
+import monthDays from 'month-days';
 
 monthDays({month: 1, year: 2016});
 //=> 29
 ```
 */
-declare function monthDays(options?: monthDays.Options): number;
-
-export = monthDays;
+export default function monthDays(options?: Options): number;

index.js

@@ -1,7 +1,6 @@
-'use strict';
 const isDefined = value => value !== undefined;
 
-module.exports = ({month, year} = {}) => {
+export default function monthDays({month, year} = {}) {
 	if (isDefined(month) && typeof month !== 'number') {
 		throw new TypeError(`Expected \`month\` to be of type \`number\`, got \`${typeof month}\``);
 	}
@@ -15,4 +14,4 @@ module.exports = ({month, year} = {}) => {
 	year = isDefined(year) ? year : now.getUTCFullYear();
 
 	return new Date(Date.UTC(year, month + 1, 0)).getUTCDate();
-};
+}

index.test-d.ts

@@ -1,5 +1,5 @@
 import {expectType} from 'tsd';
-import monthDays = require('.');
+import monthDays from './index.js';
 
 expectType<number>(monthDays());
 expectType<number>(monthDays({month: 1}));

license

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) Sindre Sorhus <[email protected]> (sindresorhus.com)
+Copyright (c) Sindre Sorhus <[email protected]> (https://sindresorhus.com)
 
 Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
 

package.json

@@ -4,13 +4,16 @@
 	"description": "Get the number of days in a month",
 	"license": "MIT",
 	"repository": "sindresorhus/month-days",
+	"funding": "https://github.com/sponsors/sindresorhus",
 	"author": {
 		"name": "Sindre Sorhus",
 		"email": "[email protected]",
-		"url": "sindresorhus.com"
+		"url": "https://sindresorhus.com"
 	},
+	"type": "module",
+	"exports": "./index.js",
 	"engines": {
-		"node": ">=8"
+		"node": "^12.20.0 || ^14.13.1 || >=16.0.0"
 	},
 	"scripts": {
 		"test": "xo && ava && tsd"
@@ -29,8 +32,8 @@
 		"count"
 	],
 	"devDependencies": {
-		"ava": "^1.4.1",
-		"tsd": "^0.7.2",
-		"xo": "^0.24.0"
+		"ava": "^3.15.0",
+		"tsd": "^0.18.0",
+		"xo": "^0.45.0"
 	}
 }

readme.md

@@ -2,45 +2,37 @@
 
 > Get the number of days in a month
 
-
 ## Install
 
-```
-$ npm install month-days
+```sh
+npm install month-days
 ```
 
-
 ## Usage
 
 ```js
-const monthDays = require('month-days');
+import monthDays from 'month-days';
 
 monthDays({month: 1, year: 2016});
 //=> 29
 ```
 
-
 ## API
 
-### monthDays([options])
+### monthDays(options?)
 
 #### options
 
 Type: `object`
 
 ##### month
 
-Type: `number`<br>
+Type: `number`\
 Default: Current UTC month
 
 Note that the month is zero-index to be consistent with the native date methods.
 
 ##### year
 
-Type: `number`<br>
+Type: `number`\
 Default: Current UTC year
-
-
-## License
-
-MIT © [Sindre Sorhus](https://sindresorhus.com)

test.js

@@ -1,18 +1,24 @@
 import test from 'ava';
-import monthDays from '.';
+import monthDays from './index.js';
 
 test('main', t => {
 	t.throws(() => {
 		monthDays({month: '5'});
-	}, TypeError);
+	}, {
+		instanceOf: TypeError,
+	});
 
 	t.throws(() => {
 		monthDays({month: false});
-	}, TypeError);
+	}, {
+		instanceOf: TypeError,
+	});
 
 	t.throws(() => {
 		monthDays({month: 5, year: true});
-	}, TypeError);
+	}, {
+		instanceOf: TypeError,
+	});
 
 	t.is(monthDays({month: 5, year: 2014}), 30);
 	t.is(monthDays({month: 5}), 30);