Adding fetch and alarm to base class chapter.

Actioning other PR comments.

Author: Oxyjun

src/content/docs/durable-objects/api/base.mdx

@@ -7,10 +7,38 @@ sidebar:
 
 import { Render, Tabs, TabItem, GlossaryTooltip, Type, MetaInfo } from "~/components";
 
-{/* DEFINITION OF DO BASE CLASS TBC */}
+The `DurableObject` base class is an abstract class which all Durable Objects inherit from. This base class provides a set of optional methods, frequently referred to as handler methods, which can respond to events, for example a webSocketMessage when using the [WebSocket Hibernation API](#/durable-objects/best-practices/websockets/#websocket-hibernation-api). To provide a concrete example, here is a Durable Object `MyDurableObject` which extends `DurableObject` and implements the fetch handler to return "Hello, World!" to the calling Worker.
+
+<TypeScriptExample>
+```ts
+export class MyDurableObject extends DurableObject {
+	constructor(ctx: DurableObjectState, env: Env) {
+		super(ctx, env);
+	}
+
+	async fetch(request: Request) {
+		return new Response("Hello, World!");
+	}
+}
+```
+</TypeScriptExample>
 
 ## Methods
 
+### `fetch`
+
+- <code>fetch(<Type text="Request"/>)</code>: <Type text="Response"/> | <Type text="Promise <Response>"/>
+
+  - Takes an HTTP request object and returns an HTTP response object. This method allows the Durable Object to emulate an HTTP server where a Worker with a binding to that object is the client.
+
+  - This method can be `async`.
+
+### `alarm`
+
+- <code>alarm()</code>: <Type text="Promise <void>"/>
+
+  - See [Alarms](/durable-objects/api/alarms/).
+
 ### `webSocketMessage`
 
 - <code> webSocketMessage(ws <Type text="WebSocket" />, message{" "} <Type text="string | ArrayBuffer" />)</code>: <Type text="void" />
@@ -39,7 +67,13 @@ import { Render, Tabs, TabItem, GlossaryTooltip, Type, MetaInfo } from "~/compon
 
 ## Properties
 
-{/* Properties of DO Base Class TBC */}
+### `DurableObjectState`
+
+See [`DurableObjectState` documentation](/durable-objects/api/state/).
+
+### `Env`
+
+A list of bindings which are available to the Durable Object.
 
 ## Related resources
 

src/content/docs/durable-objects/api/state.mdx

@@ -267,22 +267,6 @@ export class MyDurableObject extends DurableObject {
 
 - None.
 
-## Extended methods
-
-### `serializeAttachment`
-
-- <code> serializeAttachment(value <Type text="any" />)</code>: <Type text="void" />
-
-  - Keeps a copy of `value` in memory (not on disk) to survive hibernation. The value can be any type supported by the [structured clone algorithm](https://developer.mozilla.org/en-US/docs/Web/API/Web_Workers_API/Structured_clone_algorithm), which is true of most types.
-
-  - If you modify `value` after calling this method, those changes will not be retained unless you call this method again. The serialized size of `value` is limited to 2,048 bytes, otherwise this method will throw an error. If you need larger values to survive hibernation, use the [Storage API](/durable-objects/api/storage-api/) and pass the corresponding key to this method so it can be retrieved later.
-
-### `deserializeAttachment`
-
-- `deserializeAttachment()`: <Type text='any' />
-
-  - Retrieves the most recent value passed to `serializeAttachment()`, or `null` if none exists.
-
 ## Properties
 
 ### `id`

src/content/docs/durable-objects/best-practices/websockets.mdx

@@ -379,6 +379,22 @@ If you are using older versions, note that while hibernatable WebSocket events s
 
 :::
 
+## Extended methods
+
+### `serializeAttachment`
+
+- <code> serializeAttachment(value <Type text="any" />)</code>: <Type text="void" />
+
+  - Keeps a copy of `value` in memory (not on disk) to survive hibernation. The value can be any type supported by the [structured clone algorithm](https://developer.mozilla.org/en-US/docs/Web/API/Web_Workers_API/Structured_clone_algorithm), which is true of most types.
+
+  - If you modify `value` after calling this method, those changes will not be retained unless you call this method again. The serialized size of `value` is limited to 2,048 bytes, otherwise this method will throw an error. If you need larger values to survive hibernation, use the [Storage API](/durable-objects/api/storage-api/) and pass the corresponding key to this method so it can be retrieved later.
+
+### `deserializeAttachment`
+
+- `deserializeAttachment()`: <Type text='any' />
+
+  - Retrieves the most recent value passed to `serializeAttachment()`, or `null` if none exists.
+
 ## Related resources
 
 - [Mozilla Developer Network's (MDN) documentation on the WebSocket class](https://developer.mozilla.org/en-US/docs/Web/API/WebSocket)