feature: include typescript module declaration

README.md

@@ -123,6 +123,27 @@ import jQuery from 'jquery'
 // ...
 ```
 
+## Typescript
+
+The library includes automatic support providing the necessary type declarations for an integration without further configuration.
+
+```ts
+import globalJsdom from "global-jsdom";
+
+describe("Typescript test example", () => {
+	let cleanup: { (): void };
+
+	before(() => {
+		cleanup = globalJsdom();
+	});
+
+	after(() => {
+		cleanup();
+	});
+
+})
+```
+
 ## Migration from `jsdom-global`
 1. `browserify` support is dropped - I have no way to test this and `webpack` started giving higher priority to the `browser` field in `package.json` than `module`
 

packages/global-jsdom/package.json

@@ -20,6 +20,7 @@
   },
   "module": "./esm/index.mjs",
   "main": "./commonjs/index.cjs",
+  "types": "types/index.d.ts",
   "files": [
     "commonjs/*",
     "esm/*"

packages/global-jsdom/types/index.d.ts

@@ -0,0 +1,7 @@
+declare module "global-jsdom" {
+	import { ConstructorOptions } from "jsdom";
+
+	function globalJsdom(html?: string, options?: ConstructorOptions): () => void;
+
+	export = globalJsdom;
+}