js-cookie: parameterized set value

types/js-cookie/index.d.ts

@@ -33,7 +33,7 @@ declare namespace Cookies {
         secure?: boolean;
     }
 
-    interface CookiesStatic {
+    interface CookiesStatic<T extends object = object> {
         /**
          * Allows default cookie attributes to be accessed, changed, or reset
          */
@@ -42,7 +42,7 @@ declare namespace Cookies {
         /**
          * Create a cookie
          */
-        set(name: string, value: string | object, options?: CookieAttributes): void;
+        set(name: string, value: string | T, options?: CookieAttributes): void;
 
         /**
          * Read cookie
@@ -88,10 +88,10 @@ declare namespace Cookies {
          * will run the converter first for each cookie. The returned
          * string will be used as the cookie value.
          */
-        withConverter(converter: CookieReadConverter | { write: CookieWriteConverter; read: CookieReadConverter; }): CookiesStatic;
+        withConverter(converter: CookieReadConverter | { write: CookieWriteConverter<T>; read: CookieReadConverter; }): CookiesStatic;
     }
 
-    type CookieWriteConverter = (value: string | object, name: string) => string;
+    type CookieWriteConverter<T extends object> = (value: string | T, name: string) => string;
     type CookieReadConverter = (value: string, name: string) => string;
 }
 

types/js-cookie/js-cookie-tests.ts

@@ -20,7 +20,7 @@ Cookies.remove('name');
 Cookies.remove('name', { path: '' });
 
 const Cookies2 = Cookies.noConflict!();
-Cookies2; // $ExpectType CookiesStatic
+Cookies2; // $ExpectType CookiesStatic<object>
 
 Cookies.set('name', { foo: 'bar' });