Added cache control for http request within BrowserClient

pkgs/http/lib/src/browser_client.dart

@@ -4,7 +4,6 @@
 
 import 'dart:async';
 import 'dart:js_interop';
-
 import 'package:web/web.dart'
     show
         AbortController,
@@ -45,6 +44,18 @@ BaseClient createClient() {
 class BrowserClient extends BaseClient {
   final _abortController = AbortController();
 
+  /// Create a new browser-based HTTP Client.
+  ///
+  /// If [cacheMode] is provided then it can be used to cache the request
+  /// in the browser.
+  ///
+  /// For example:
+  /// ```dart
+  /// const mode = 'reload';
+  /// final client = BrowserClient(cacheMode: mode);
+  /// ```
+  BrowserClient({this.cacheMode = 'default'});
+
   /// Whether to send credentials such as cookies or authorization headers for
   /// cross-site requests.
   ///
@@ -53,6 +64,11 @@ class BrowserClient extends BaseClient {
 
   bool _isClosed = false;
 
+  /// Use different caching mode for a HTTP request.
+  /// Defaults to `default`.
+  // https://developer.mozilla.org/en-US/docs/Web/API/Request/cache
+  String cacheMode;
+
   /// Sends an HTTP request and asynchronously returns the response.
   @override
   Future<StreamedResponse> send(BaseRequest request) async {
@@ -69,6 +85,7 @@ class BrowserClient extends BaseClient {
             RequestInit(
               method: request.method,
               body: bodyBytes.isNotEmpty ? bodyBytes.toJS : null,
+              cache: cacheMode,
               credentials: withCredentials ? 'include' : 'same-origin',
               headers: {
                 if (request.contentLength case final contentLength?)

pkgs/http/lib/src/utils.dart

@@ -68,3 +68,22 @@ Stream<T> onDone<T>(Stream<T> stream, void Function() onDone) =>
       sink.close();
       onDone();
     }));
+
+/// Caching modes for any http request in a browser.
+enum CacheMode {
+  defaultType('default'),
+  reload('reload'),
+  noStore('no-store'),
+  noCache('no-cache'),
+  forceCache('force-cache'),
+  onlyIfCached('only-if-cached');
+
+  final String cacheType;
+
+  const CacheMode(this.cacheType);
+
+  static CacheMode fromString(String cacheType) => values.firstWhere(
+        (v) => v.cacheType == cacheType,
+        orElse: () => CacheMode.defaultType,
+      );
+}