Add types, target Node.js 18 (#5)

.github/workflows/main.yml

@@ -10,11 +10,12 @@ jobs:
       fail-fast: false
       matrix:
         node-version:
-          - 14
-          - 12
+          - 21
+          - 20
+          - 18
     steps:
-      - uses: actions/checkout@v2
-      - uses: actions/setup-node@v2
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
         with:
           node-version: ${{ matrix.node-version }}
       - run: npm install

index.d.ts

@@ -0,0 +1,15 @@
+/**
+Check if a string has [ANSI escape codes](https://en.wikipedia.org/wiki/ANSI_escape_code).
+
+@example
+```
+import hasAnsi from 'has-ansi';
+
+hasAnsi('\u001B[4mUnicorn\u001B[0m');
+//=> true
+
+hasAnsi('cake');
+//=> false
+```
+*/
+export default function hasAnsi(string: string): boolean;

index.test-d.ts

@@ -0,0 +1,5 @@
+import {expectType} from 'tsd';
+import hasAnsi from './index.js';
+
+expectType<boolean>(hasAnsi('foo\u001B[4mcake\u001B[0m'));
+expectType<boolean>(hasAnsi('cake'));

package.json

@@ -11,15 +11,19 @@
 		"url": "https://sindresorhus.com"
 	},
 	"type": "module",
-	"exports": "./index.js",
+	"exports": {
+		"default": "./index.js",
+		"types": "./index.d.ts"
+	},
 	"engines": {
-		"node": ">=12"
+		"node": ">=18"
 	},
 	"scripts": {
-		"test": "xo && ava"
+		"test": "xo && ava && tsd"
 	},
 	"files": [
-		"index.js"
+		"index.js",
+		"index.d.ts"
 	],
 	"keywords": [
 		"ansi",
@@ -48,7 +52,8 @@
 		"ansi-regex": "^6.0.1"
 	},
 	"devDependencies": {
-		"ava": "^3.15.0",
-		"xo": "^0.44.0"
+		"ava": "^6.1.3",
+		"tsd": "^0.31.1",
+		"xo": "^0.58.0"
 	}
 }

readme.md

@@ -4,8 +4,8 @@
 
 ## Install
 
-```
-$ npm install has-ansi
+```sh
+npm install has-ansi
 ```
 
 ## Usage