Add TypeScript definition (#50)

Co-authored-by: Sindre Sorhus <sindresorhus@gmail.com>

index.d.ts

@@ -0,0 +1,41 @@
+export type Options = {
+	/**
+	By default the wrap is soft, meaning long words may extend past the column width. Setting this to `true` will make it hard wrap at the column width.
+
+	@default false
+	*/
+	readonly hard?: boolean;
+
+	/**
+	By default, an attempt is made to split words at spaces, ensuring that they don't extend past the configured columns. If wordWrap is `false`, each column will instead be completely filled splitting words as necessary.
+
+	@default true
+	*/
+	readonly wordWrap?: boolean;
+
+	/**
+	Whitespace on all lines is removed by default. Set this option to `false` if you don't want to trim.
+
+	@default true
+	*/
+	readonly trim?: boolean;
+};
+
+/**
+Wrap words to the specified column width.
+
+@param string - String with ANSI escape codes. Like one styled by [`chalk`](https://github.com/chalk/chalk). Newline characters will be normalized to `\n`.
+@param columns - Number of columns to wrap the text to.
+
+@example
+```
+import chalk from 'chalk';
+import wrapAnsi from 'wrap-ansi';
+
+const input = 'The quick brown ' + chalk.red('fox jumped over ') +
+	'the lazy ' + chalk.green('dog and then ran away with the unicorn.');
+
+console.log(wrapAnsi(input, 20));
+```
+*/
+export default function wrapAnsi(string: string, columns: number, options?: Options): string;

index.test-d.ts

@@ -0,0 +1,11 @@
+import {expectType} from 'tsd';
+import wrapAnsi from './index.js';
+
+expectType<string>(wrapAnsi('input', 80));
+expectType<string>(wrapAnsi('input', 80, {}));
+expectType<string>(wrapAnsi('input', 80, {hard: true}));
+expectType<string>(wrapAnsi('input', 80, {hard: false}));
+expectType<string>(wrapAnsi('input', 80, {trim: true}));
+expectType<string>(wrapAnsi('input', 80, {trim: false}));
+expectType<string>(wrapAnsi('input', 80, {wordWrap: true}));
+expectType<string>(wrapAnsi('input', 80, {wordWrap: false}));

package.json

@@ -11,15 +11,19 @@
 		"url": "https://sindresorhus.com"
 	},
 	"type": "module",
-	"exports": "./index.js",
+	"exports": {
+		"types": "./index.d.ts",
+		"default": "./index.js"
+	},
 	"engines": {
 		"node": ">=12"
 	},
 	"scripts": {
-		"test": "xo && nyc ava"
+		"test": "xo && nyc ava && tsd"
 	},
 	"files": [
-		"index.js"
+		"index.js",
+		"index.d.ts"
 	],
 	"keywords": [
 		"wrap",
@@ -59,6 +63,7 @@
 		"coveralls": "^3.1.1",
 		"has-ansi": "^5.0.1",
 		"nyc": "^15.1.0",
+		"tsd": "^0.25.0",
 		"xo": "^0.44.0"
 	}
 }