1 files changed, 21 insertions, 1 deletions
diff --git a/js/fetch.ts b/js/fetch.ts
index ae62c576d..eef149e4d 100644
--- a/js/fetch.ts
+++ b/js/fetch.ts
@@ -5,7 +5,8 @@ import {
   createResolvable,
   Resolvable,
   typedArrayToArrayBuffer,
-  notImplemented
+  notImplemented,
+  CreateIterableIterator
 } from "./util";
 import * as flatbuffers from "./flatbuffers";
 import { sendAsync } from "./dispatch";
@@ -70,6 +71,11 @@ export class DenoHeaders implements domTypes.Headers {
     this.headerMap.delete(newname);
   }
 
+  entries(): IterableIterator<[string, string]> {
+    const iterators = this.headerMap.entries();
+    return new CreateIterableIterator(iterators);
+  }
+
   get(name: string): string | null {
     const [newname] = this.normalizeParams(name);
     const value = this.headerMap.get(newname);
@@ -81,11 +87,21 @@ export class DenoHeaders implements domTypes.Headers {
     return this.headerMap.has(newname);
   }
 
+  keys(): IterableIterator<string> {
+    const iterators = this.headerMap.keys();
+    return new CreateIterableIterator(iterators); 
+  }
+
   set(name: string, value: string): void {
     const [newname, newvalue] = this.normalizeParams(name, value);
     this.headerMap.set(newname, newvalue);
   }
 
+  values(): IterableIterator<string> {
+    const iterators = this.headerMap.values();
+    return new CreateIterableIterator(iterators); 
+  }
+
   forEach(
     callbackfn: (value: string, key: string, parent: domTypes.Headers) => void,
     // tslint:disable-next-line:no-any
@@ -95,6 +111,10 @@ export class DenoHeaders implements domTypes.Headers {
       callbackfn(value, name, this);
     });
   }
+
+  [Symbol.iterator](): IterableIterator<[string, string]> {
+    return this.entries();
+  }
 }
 
 class FetchResponse implements domTypes.Response {