Merge pull request #4050 from ksheedlo/whatwg-fetch-support-stringstring-headers

Add support for headers as object in whatwg-fetch

whatwg-fetch/whatwg-fetch-tests.ts

@@ -11,6 +11,16 @@ function test_fetchUrlWithOptions() {
 	handlePromise(window.fetch("http://www.andlabs.net/html5/uCOR.php", requestOptions));
 }
 
+function test_fetchUrlWithHeadersObject() {
+	var requestOptions: RequestInit = {
+		method: "POST",
+		headers: {
+			'Content-Type': 'application/json'
+		}
+	};
+	handlePromise(window.fetch("http://www.andlabs.net/html5/uCOR.php", requestOptions));
+}
+
 function test_fetchUrl() {
 	handlePromise(window.fetch("http://www.andlabs.net/html5/uCOR.php"));
 }
@@ -21,4 +31,4 @@ function handlePromise(promise: Promise<Response>) {
 	}).then((text) => {
 		console.log(text);
 	});
-}
+}

whatwg-fetch/whatwg-fetch.d.ts

@@ -19,7 +19,7 @@ declare class Request {
 
 interface RequestInit {
 	method?: string;
-	headers?: HeaderInit;
+	headers?: HeaderInit|{ [index: string]: string };
 	body?: BodyInit;
 	mode?: RequestMode;
 	credentials?: RequestCredentials;
@@ -81,4 +81,4 @@ declare type RequestInfo = Request|string;
 
 interface Window {
 	fetch(url: string, init?: RequestInit): Promise<Response>;
-}
+}