Add TypeScript definition (#17)

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

index.d.ts

@@ -0,0 +1,45 @@
+/// <reference types="node"/>
+
+declare namespace electronReloader {
+	interface Options {
+		/**
+		Watch files used in the renderer process and reload the window when they change.
+
+		@default true
+		*/
+		readonly watchRenderer?: boolean;
+
+		/**
+		Prints watched paths and when files change. Can be useful to make sure you set it up correctly.
+
+		@default false
+		*/
+		readonly debug?: boolean;
+
+		/**
+		Ignore patterns passed to [`chokidar`](https://github.com/paulmillr/chokidar#path-filtering).
+
+		By default, files/directories starting with a `.`, `.map` files, and `node_modules` directories are ignored. This option is additive to those.
+		*/
+		readonly ignore?: readonly (string | RegExp)[];
+	}
+}
+
+/**
+@param moduleObject - Global `module` object.
+
+@example
+```
+import electronReloader = require('electron-reloader');
+
+try {
+	require('electron-reloader')(module);
+} catch {}
+```
+*/
+declare function electronReloader(
+	moduleObject: NodeModule,
+	options?: electronReloader.Options
+): void;
+
+export = electronReloader;

index.test-d.ts

@@ -0,0 +1,8 @@
+import {expectType} from 'tsd';
+import electronReloader = require('.');
+
+expectType<void>(electronReloader(module));
+expectType<void>(electronReloader(module, {watchRenderer: true}));
+expectType<void>(electronReloader(module, {debug: true, ignore: ['tmp', /dist/]}));
+expectType<void>(electronReloader(module, {watchRenderer: true, ignore: ['tmp', /dist/]}));
+expectType<void>(electronReloader(module, {watchRenderer: true, debug: true, ignore: ['tmp', /dist/]}));

package.json

@@ -11,11 +11,12 @@
 		"url": "https://sindresorhus.com"
 	},
 	"scripts": {
-		"test": "xo",
+		"test": "xo && tsd",
 		"start": "electron test/main"
 	},
 	"files": [
-		"index.js"
+		"index.js",
+		"index.d.ts"
 	],
 	"keywords": [
 		"electron",
@@ -44,7 +45,9 @@
 		"find-up": "^4.1.0"
 	},
 	"devDependencies": {
+		"@types/node": "^14.14.20",
 		"electron": "^8.0.0",
+		"tsd": "^0.14.0",
 		"xo": "^0.26.1"
 	},
 	"xo": {