doc(typescript): add usage example

README.md

@@ -22,12 +22,45 @@ Install `ember-cookies` with
 
 ## Example Usage
 
+### Typescript
+
+```ts
+// app/controllers/index.ts
+import { inject as service } from '@ember/service';
+import Controller from '@ember/controller';
+import CookiesService from 'ember-cookies/services/cookies';
+
+type Cookie = { name: string; value: any };
+
+export default class IndexController extends Controller {
+  @service cookies!: CookiesService;
+
+  get allCookies(): Cookie[] {
+    this.cookies.write('now', new Date().getTime());
+
+    const cookies = this.cookies.read();
+    return Object.keys(cookies).reduce((acc, key) => {
+      let value = cookies[key];
+      acc.push({ name: key, value });
+
+      return acc;
+    }, [] as Cookie[]);
+  }
+
+  get singleCookie(): Cookie {
+    const cookie = this.cookies.read('now');
+    return { name: 'now', value: cookie };
+  }
+}
+```
+
+### Javascript
+
 ```js
-// app/controllers/application.js
+// app/controllers/index.js
 import Controller from '@ember/controller';
 import { inject as service } from '@ember/service';
 import { computed } from '@ember/object';
-const { keys } = Object;
 
 export default class ApplicationController extends Controller {
   @service cookies;
@@ -38,7 +71,7 @@ export default class ApplicationController extends Controller {
     cookieService.write('now', new Date().getTime());
 
     let cookies = cookieService.read();
-    return keys(cookies).reduce((acc, key) => {
+    return Object.keys(cookies).reduce((acc, key) => {
       let value = cookies[key];
       acc.push({ name: key, value });
 

packages/ember-cookies/src/services/cookies.ts

@@ -97,6 +97,8 @@ export default class CookiesService extends Service {
     return this._filterCachedFastBootCookies(mergedFastBootCookies);
   }
 
+  read(): Record<string, string | undefined>;
+  read(name: string): string | undefined;
   read(
     name?: string,
     options: ReadOptions = {}

packages/test-app/app/controllers/index.ts

@@ -1,10 +1,11 @@
 import { inject as service } from '@ember/service';
 import Controller from '@ember/controller';
+import CookiesService from 'ember-cookies/services/cookies';
 
 type Cookie = { name: string; value: any };
 
 export default class IndexController extends Controller {
-  @service cookies!: any;
+  @service cookies!: CookiesService;
 
   get allCookies(): Cookie[] {
     this.cookies.write('now', new Date().getTime());
@@ -17,4 +18,9 @@ export default class IndexController extends Controller {
       return acc;
     }, [] as Cookie[]);
   }
+
+  get singleCookie(): Cookie {
+    const cookie = this.cookies.read('now');
+    return { name: 'now', value: cookie };
+  }
 }