Update readme to incldue new enable cors feature

Author: bpedroza

README.md

@@ -86,3 +86,11 @@ const pkce = new PKCE({
   storage: localStorage, // any Storage object, sessionStorage (default) or localStorage 
 });
 ```
+
+## Cors credentials
+When using httpOnly cookies, there is some additional configuration required. The method 
+`enableCorsCredentials` can be called to allow sending credentials.
+
+```javascript
+pkce.enableCorsCredentials(true);
+```

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "js-pkce",
-  "version": "1.3.1",
+  "version": "1.4.0",
   "description": "A package that makes using the OAuth2 PKCE flow easier",
   "main": "dist/PKCE.js",
   "types": "dist/PKCE.d.ts",

package.json

@@ -1,5 +1,5 @@
 export default interface ICorsOptions {
-  credentials?: 'omit' | 'same-origin' | 'include',
+  credentials?: 'omit' | 'same-origin' | 'include';
   // RFC for mode options: https://fetch.spec.whatwg.org/#concept-request-mode
-  mode?: 'cors' | 'no-cors' | 'same-origin' | 'navigate'
+  mode?: 'cors' | 'no-cors' | 'same-origin' | 'navigate';
 }

src/ICorsOptions.ts

@@ -11,7 +11,7 @@ export default class PKCE {
   private config: IConfig;
   private state: string = '';
   private codeVerifier: string = '';
-  private corsRequestOptions:ICorsOptions = {};
+  private corsRequestOptions: ICorsOptions = {};
 
   /**
    * Initialize the instance with configuration
@@ -27,12 +27,13 @@ export default class PKCE {
    * @return ICorsOptions
    */
   public enableCorsCredentials(enable: boolean): ICorsOptions {
-
-    this.corsRequestOptions = (enable) ? {
-      credentials: 'include',
-      mode: 'cors'
-    } : {}
-    return this.corsRequestOptions
+    this.corsRequestOptions = enable
+      ? {
+          credentials: 'include',
+          mode: 'cors',
+        }
+      : {};
+    return this.corsRequestOptions;
   }
 
   /**
@@ -87,7 +88,7 @@ export default class PKCE {
           Accept: 'application/json',
           'Content-Type': 'application/x-www-form-urlencoded;charset=UTF-8',
         },
-        ...this.corsRequestOptions
+        ...this.corsRequestOptions,
       }).then((response) => response.json());
     });
   }