Require Node.js 14

Author: sindresorhus

index.d.ts

@@ -1,4 +1,4 @@
-import {
+import type {
 	CamelCasedProperties,
 	PackageJson,
 } from 'type-fest';
@@ -15,21 +15,21 @@ Callback function to determine if a flag is required during runtime.
 */
 export type IsRequiredPredicate = (flags: Readonly<AnyFlags>, input: readonly string[]) => boolean;
 
-export interface Flag<Type extends FlagType, Default, IsMultiple = false> {
+export type Flag<Type extends FlagType, Default, IsMultiple = false> = {
 	readonly type?: Type;
 	readonly alias?: string;
 	readonly default?: Default;
 	readonly isRequired?: boolean | IsRequiredPredicate;
 	readonly isMultiple?: IsMultiple;
-}
+};
 
 type StringFlag = Flag<'string', string> | Flag<'string', string[], true>;
 type BooleanFlag = Flag<'boolean', boolean> | Flag<'boolean', boolean[], true>;
 type NumberFlag = Flag<'number', number> | Flag<'number', number[], true>;
 type AnyFlag = StringFlag | BooleanFlag | NumberFlag;
 type AnyFlags = Record<string, AnyFlag>;
 
-export interface Options<Flags extends AnyFlags> {
+export type Options<Flags extends AnyFlags> = {
 	/**
 	Pass in [`import.meta`](https://nodejs.org/dist/latest/docs/api/esm.html#esm_import_meta). This is used to find the correct package.json file.
 	*/
@@ -216,7 +216,7 @@ export interface Options<Flags extends AnyFlags> {
 	@default true
 	*/
 	readonly allowUnknownFlags?: boolean;
-}
+};
 
 type TypedFlag<Flag extends AnyFlag> =
 		Flag extends {type: 'number'}
@@ -240,7 +240,7 @@ export type TypedFlags<Flags extends AnyFlags> = {
 		: PossiblyOptionalFlag<Flags[F], TypedFlag<Flags[F]>>
 };
 
-export interface Result<Flags extends AnyFlags> {
+export type Result<Flags extends AnyFlags> = {
 	/**
 	Non-flag arguments.
 	*/
@@ -277,7 +277,7 @@ export interface Result<Flags extends AnyFlags> {
 	Show the version text and exit.
 	*/
 	showVersion: () => void;
-}
+};
 /**
 @param helpMessage - Shortcut for the `help` option.
 

index.js

@@ -82,7 +82,7 @@ const buildParserFlags = ({flags, booleanDefault}) => {
 
 		if (flag.isMultiple) {
 			flag.type = flag.type ? `${flag.type}-array` : 'array';
-			flag.default = flag.default || [];
+			flag.default = flag.default ?? [];
 			delete flag.isMultiple;
 		}
 
@@ -107,7 +107,7 @@ const meow = (helpText, options = {}) => {
 		helpText = '';
 	}
 
-	if (!(options.importMeta && options.importMeta.url)) {
+	if (!options.importMeta?.url) {
 		throw new TypeError('The `importMeta` option is required. Its value must be `import.meta`.');
 	}
 
@@ -176,7 +176,7 @@ const meow = (helpText, options = {}) => {
 
 	const {pkg: package_} = options;
 	const argv = parseArguments(options.argv, parserOptions);
-	let help = redent(trimNewlines((options.help || '').replace(/\t+\n*$/, '')), 2);
+	let help = redent(trimNewlines((options.help ?? '').replace(/\t+\n*$/, '')), 2);
 
 	normalizePackageData(package_);
 

index.test-d.ts

@@ -1,6 +1,6 @@
 import {expectAssignable, expectError, expectType} from 'tsd';
-import {PackageJson} from 'type-fest';
-import meow, {Result, AnyFlag} from './index.js';
+import type {PackageJson} from 'type-fest';
+import meow, {type Result, type AnyFlag} from './index.js';
 
 const importMeta = import.meta;
 

package.json

@@ -11,9 +11,12 @@
 		"url": "https://sindresorhus.com"
 	},
 	"type": "module",
-	"exports": "./index.js",
+	"exports": {
+		"types": "./index.d.ts",
+		"default": "./index.js"
+	},
 	"engines": {
-		"node": "^12.20.0 || ^14.13.1 || >=16.0.0"
+		"node": ">=14.16"
 	},
 	"scripts": {
 		"test": "xo && ava && tsd"
@@ -43,25 +46,25 @@
 	],
 	"dependencies": {
 		"@types/minimist": "^1.2.2",
-		"camelcase-keys": "^7.0.0",
-		"decamelize": "^5.0.0",
+		"camelcase-keys": "^8.0.2",
+		"decamelize": "^6.0.0",
 		"decamelize-keys": "^1.1.0",
 		"hard-rejection": "^2.1.0",
 		"minimist-options": "4.1.0",
-		"normalize-package-data": "^3.0.2",
-		"read-pkg-up": "^8.0.0",
+		"normalize-package-data": "^4.0.1",
+		"read-pkg-up": "^9.1.0",
 		"redent": "^4.0.0",
 		"trim-newlines": "^4.0.2",
 		"type-fest": "^3.1.0",
-		"yargs-parser": "^20.2.9"
+		"yargs-parser": "^21.1.1"
 	},
 	"devDependencies": {
-		"ava": "^3.15.0",
+		"ava": "^4.3.3",
 		"execa": "^6.1.0",
 		"indent-string": "^5.0.0",
 		"read-pkg": "^7.1.0",
-		"tsd": "^0.20.0",
-		"xo": "^0.48.0"
+		"tsd": "^0.24.1",
+		"xo": "^0.52.4"
 	},
 	"xo": {
 		"rules": {

test/test.js

@@ -101,13 +101,13 @@ test('spawn cli and test input flag', async t => {
 	t.is(stdout, 'bar');
 });
 
-test.serial('pkg.bin as a string should work', t => {
+test.serial.failing('pkg.bin as a string should work', t => {
 	meow({
 		importMeta,
 		pkg: {
 			importMeta,
 			name: 'browser-sync',
-			bin: 'bin/browser-sync.js',
+			bin: './bin/browser-sync.js',
 		},
 	});