Require Node.js 18

.github/workflows/test.yml

@@ -7,12 +7,12 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node_version: [14, 16, 18]
+        node_version: [18, 20]
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Use Node.js ${{ matrix.node_version }}
-        uses: actions/setup-node@v3
+        uses: actions/setup-node@v4
         with:
           node-version: ${{ matrix.node_version }}
       - run: npm install

examples/jest/summary.tsx

@@ -2,10 +2,10 @@ import React from 'react';
 import {Box, Text} from '../../src/index.js';
 
 type Props = {
-	isFinished: boolean;
-	passed: number;
-	failed: number;
-	time: string;
+	readonly isFinished: boolean;
+	readonly passed: number;
+	readonly failed: number;
+	readonly time: string;
 };
 
 function Summary({isFinished, passed, failed, time}: Props) {

examples/jest/test.tsx

@@ -22,8 +22,8 @@ const getBackgroundForStatus = (status: string): string | undefined => {
 };
 
 type Props = {
-	status: string;
-	path: string;
+	readonly status: string;
+	readonly path: string;
 };
 
 function Test({status, path}: Props) {

examples/use-focus-with-id/use-focus-with-id.tsx

@@ -41,8 +41,8 @@ function Focus() {
 }
 
 type ItemProps = {
-	id: number;
-	label: string;
+	readonly id: number;
+	readonly label: string;
 };
 
 function Item({label, id}: ItemProps) {

package.json

@@ -15,7 +15,7 @@
 		"default": "./build/index.js"
 	},
 	"engines": {
-		"node": ">=14.16"
+		"node": ">=18"
 	},
 	"scripts": {
 		"dev": "tsc --watch",
@@ -45,33 +45,32 @@
 	"dependencies": {
 		"@alcalzone/ansi-tokenize": "^0.1.3",
 		"ansi-escapes": "^6.0.0",
+		"ansi-styles": "^6.2.1",
 		"auto-bind": "^5.0.1",
-		"chalk": "^5.2.0",
+		"chalk": "^5.3.0",
 		"cli-boxes": "^3.0.0",
 		"cli-cursor": "^4.0.0",
-		"cli-truncate": "^3.1.0",
+		"cli-truncate": "^4.0.0",
 		"code-excerpt": "^4.0.0",
 		"indent-string": "^5.0.0",
 		"is-ci": "^3.0.1",
-		"is-lower-case": "^2.0.2",
-		"is-upper-case": "^2.0.2",
 		"lodash": "^4.17.21",
 		"patch-console": "^2.0.0",
 		"react-reconciler": "^0.29.0",
 		"scheduler": "^0.23.0",
 		"signal-exit": "^3.0.7",
-		"slice-ansi": "^6.0.0",
+		"slice-ansi": "^7.1.0",
 		"stack-utils": "^2.0.6",
-		"string-width": "^5.1.2",
-		"type-fest": "^0.12.0",
-		"widest-line": "^4.0.1",
-		"wrap-ansi": "^8.1.0",
+		"string-width": "^7.0.0",
+		"type-fest": "^4.6.0",
+		"widest-line": "^5.0.0",
+		"wrap-ansi": "^9.0.0",
 		"ws": "^8.12.0",
 		"yoga-wasm-web": "~0.3.3"
 	},
 	"devDependencies": {
-		"@faker-js/faker": "^7.6.0",
-		"@sindresorhus/tsconfig": "3.0.1",
+		"@faker-js/faker": "^8.2.0",
+		"@sindresorhus/tsconfig": "^5.0.0",
 		"@types/benchmark": "^2.1.2",
 		"@types/is-ci": "^2.0.0",
 		"@types/lodash": "^4.14.191",
@@ -81,29 +80,27 @@
 		"@types/react-reconciler": "^0.28.2",
 		"@types/scheduler": "^0.16.2",
 		"@types/signal-exit": "^3.0.0",
-		"@types/sinon": "^9.0.4",
-		"@types/slice-ansi": "^4.0.0",
-		"@types/stack-utils": "^1.0.1",
-		"@types/wrap-ansi": "^3.0.0",
+		"@types/sinon": "^10.0.20",
+		"@types/stack-utils": "^2.0.2",
 		"@types/ws": "^8.5.4",
 		"@vdemedes/prettier-config": "^1.0.1",
 		"ava": "^5.1.1",
 		"boxen": "^7.0.1",
-		"delay": "^5.0.0",
+		"delay": "^6.0.0",
 		"eslint-config-xo-react": "0.27.0",
-		"eslint-plugin-react": "7.32.2",
+		"eslint-plugin-react": "^7.33.2",
 		"eslint-plugin-react-hooks": "4.6.0",
 		"ms": "^2.1.3",
-		"node-pty": "0.10.1",
+		"node-pty": "^1.0.0",
 		"p-queue": "^7.3.4",
 		"prettier": "^2.0.4",
 		"react": "^18.0.0",
 		"react-devtools-core": "^4.19.1",
-		"sinon": "^12.0.1",
-		"strip-ansi": "^6.0.0",
+		"sinon": "^17.0.0",
+		"strip-ansi": "^7.1.0",
 		"ts-node": "10.9.1",
-		"typescript": "^4.9.4",
-		"xo": "0.54.2"
+		"typescript": "^5.2.2",
+		"xo": "^0.56.0"
 	},
 	"peerDependencies": {
 		"@types/react": ">=18.0.0",

src/components/App.tsx

@@ -261,8 +261,7 @@ export default class App extends PureComponent<Props, State> {
 
 	focusPrevious = (): void => {
 		this.setState(previousState => {
-			const lastFocusableId =
-				previousState.focusables[previousState.focusables.length - 1]?.id;
+			const lastFocusableId = previousState.focusables.at(-1)?.id;
 
 			const previousFocusableId = this.findPreviousFocusable(previousState);
 

src/hooks/use-input.ts

@@ -1,5 +1,4 @@
 import {useEffect} from 'react';
-import {isUpperCase} from 'is-upper-case';
 import parseKeypress, {nonAlphanumericKeys} from '../parse-keypress.js';
 import reconciler from '../reconciler.js';
 import useStdin from './use-stdin.js';
@@ -176,7 +175,7 @@ const useInput = (inputHandler: Handler, options: Options = {}) => {
 			if (
 				input.length === 1 &&
 				typeof input[0] === 'string' &&
-				isUpperCase(input[0])
+				input[0].toUpperCase() === input[0]
 			) {
 				key.shift = true;
 			}

src/output.ts

@@ -131,7 +131,7 @@ export default class Output {
 				let {x, y} = operation;
 				let lines = text.split('\n');
 
-				const clip = clips[clips.length - 1];
+				const clip = clips.at(-1);
 
 				if (clip) {
 					const clipHorizontally =

src/styles.ts

@@ -1,7 +1,7 @@
 /* eslint-disable @typescript-eslint/prefer-nullish-coalescing */
 import {type Boxes, type BoxStyle} from 'cli-boxes';
 import {type LiteralUnion} from 'type-fest';
-import {type ForegroundColorName} from 'chalk';
+import {type ForegroundColorName} from 'ansi-styles'; // Note: We import directly from `ansi-styles` to avoid a bug in TypeScript.
 // eslint-disable-next-line n/file-extension-in-import
 import Yoga, {type Node as YogaNode} from 'yoga-wasm-web/auto';
 

test/borders.tsx

@@ -415,7 +415,7 @@ test('nested boxes - fit-content box with emojis on flex-direction column', t =>
 test('render border after update', t => {
 	const stdout = createStdout();
 
-	function Test({borderColor}: {borderColor?: string}) {
+	function Test({borderColor}: {readonly borderColor?: string}) {
 		return (
 			<Box borderStyle="round" borderColor={borderColor}>
 				<Text>Hello World</Text>

test/components.tsx

@@ -375,7 +375,7 @@ test('static output', t => {
 test('skip previous output when rendering new static output', t => {
 	const stdout = createStdout();
 
-	function Dynamic({items}: {items: string[]}) {
+	function Dynamic({items}: {readonly items: string[]}) {
 		return (
 			<Static items={items}>{item => <Text key={item}>{item}</Text>}</Static>
 		);
@@ -395,7 +395,7 @@ test('skip previous output when rendering new static output', t => {
 test('render only new items in static output on final render', t => {
 	const stdout = createStdout();
 
-	function Dynamic({items}: {items: string[]}) {
+	function Dynamic({items}: {readonly items: string[]}) {
 		return (
 			<Static items={items}>{item => <Text key={item}>{item}</Text>}</Static>
 		);
@@ -426,7 +426,7 @@ test('ensure wrap-ansi doesn’t trim leading whitespace', t => {
 test('replace child node with text', t => {
 	const stdout = createStdout();
 
-	function Dynamic({replace}: {replace?: boolean}) {
+	function Dynamic({replace}: {readonly replace?: boolean}) {
 		return <Text>{replace ? 'x' : <Text color="green">test</Text>}</Text>;
 	}
 
@@ -476,8 +476,8 @@ test('disable raw mode when all input components are unmounted', t => {
 		renderFirstInput,
 		renderSecondInput
 	}: {
-		renderFirstInput?: boolean;
-		renderSecondInput?: boolean;
+		readonly renderFirstInput?: boolean;
+		readonly renderSecondInput?: boolean;
 	}) {
 		const {setRawMode} = useStdin();
 
@@ -597,8 +597,8 @@ test('render different component based on whether stdin is a TTY or not', t => {
 		renderFirstInput,
 		renderSecondInput
 	}: {
-		renderFirstInput?: boolean;
-		renderSecondInput?: boolean;
+		readonly renderFirstInput?: boolean;
+		readonly renderSecondInput?: boolean;
 	}) {
 		const {isRawModeSupported, setRawMode} = useStdin();
 
@@ -660,7 +660,7 @@ test('render all frames if CI environment variable equals false', async t => {
 test('reset prop when it’s removed from the element', t => {
 	const stdout = createStdout();
 
-	function Dynamic({remove}: {remove?: boolean}) {
+	function Dynamic({remove}: {readonly remove?: boolean}) {
 		return (
 			<Box
 				flexDirection="column"

test/exit.tsx

@@ -81,7 +81,7 @@ test.serial('don’t exit while raw mode is active', async t => {
 
 		let output = '';
 
-		term.on('data', (data: string) => {
+		term.onData(data => {
 			if (data === 's') {
 				setTimeout(() => {
 					t.false(isExited);
@@ -100,10 +100,10 @@ test.serial('don’t exit while raw mode is active', async t => {
 
 		let isExited = false;
 
-		term.on('exit', (code: any) => {
+		term.onExit(({exitCode}) => {
 			isExited = true;
 
-			if (code === 0) {
+			if (exitCode === 0) {
 				t.true(output.includes('exited'));
 				t.pass();
 				resolve();

test/fixtures/use-input.tsx

@@ -2,7 +2,7 @@ import process from 'node:process';
 import React from 'react';
 import {render, useInput, useApp} from '../../src/index.js';
 
-function UserInput({test}: {test: string | undefined}) {
+function UserInput({test}: {readonly test: string | undefined}) {
 	const {exit} = useApp();
 
 	useInput((input, key) => {

test/focus.tsx

@@ -27,13 +27,13 @@ const emitReadable = (stdin: NodeJS.WriteStream, chunk: string) => {
 };
 
 type TestProps = {
-	showFirst?: boolean;
-	disableSecond?: boolean;
-	autoFocus?: boolean;
-	disabled?: boolean;
-	focusNext?: boolean;
-	focusPrevious?: boolean;
-	unmountChildren?: boolean;
+	readonly showFirst?: boolean;
+	readonly disableSecond?: boolean;
+	readonly autoFocus?: boolean;
+	readonly disabled?: boolean;
+	readonly focusNext?: boolean;
+	readonly focusPrevious?: boolean;
+	readonly unmountChildren?: boolean;
 };
 
 function Test({
@@ -81,9 +81,9 @@ function Test({
 }
 
 type ItemProps = {
-	label: string;
-	autoFocus: boolean;
-	disabled?: boolean;
+	readonly label: string;
+	readonly autoFocus: boolean;
+	readonly disabled?: boolean;
 };
 
 function Item({label, autoFocus, disabled = false}: ItemProps) {

test/helpers/run.ts

@@ -42,17 +42,17 @@ export const run: Run = async (fixture, props) => {
 
 		let output = '';
 
-		term.on('data', (data: string) => {
+		term.onData(data => {
 			output += data;
 		});
 
-		term.on('exit', (code: number) => {
-			if (code === 0) {
+		term.onExit(({exitCode}) => {
+			if (exitCode === 0) {
 				resolve(output);
 				return;
 			}
 
-			reject(new Error(`Process exited with a non-zero code: ${output}`));
+			reject(new Error(`Process exited with a non-zero code: ${exitCode}`));
 		});
 	});
 };

test/hooks.tsx

@@ -1,14 +1,9 @@
 import process from 'node:process';
-import {createRequire} from 'node:module';
 import url from 'node:url';
-import * as path from 'node:path';
+import path from 'node:path';
 import test, {type ExecutionContext} from 'ava';
 import stripAnsi from 'strip-ansi';
-
-const require = createRequire(import.meta.url);
-
-// eslint-disable-next-line @typescript-eslint/consistent-type-imports
-const {spawn} = require('node-pty') as typeof import('node-pty');
+import {spawn} from 'node-pty';
 
 const __dirname = url.fileURLToPath(new URL('.', import.meta.url));
 
@@ -56,17 +51,17 @@ const term = (fixture: string, args: string[] = []) => {
 		waitForExit: async () => exitPromise
 	};
 
-	ps.on('data', (data: string) => {
+	ps.onData(data => {
 		result.output += data;
 	});
 
-	ps.on('exit', (code: number) => {
-		if (code === 0) {
+	ps.onExit(({exitCode}) => {
+		if (exitCode === 0) {
 			resolve();
 			return;
 		}
 
-		reject(new Error(`Process exited with non-zero exit code: ${code}`));
+		reject(new Error(`Process exited with non-zero exit code: ${exitCode}`));
 	});
 
 	return result;