book: add JS hello example

Signed-off-by: Yuki Kishimoto <[email protected]>

book/snippets/js/src/hello.ts

@@ -0,0 +1,22 @@
+// ANCHOR: full
+import {Keys, Client, EventBuilder, NostrSigner} from "@rust-nostr/nostr-sdk";
+
+export async function hello() {
+    // ANCHOR: client
+    let keys: Keys = Keys.generate();
+    let signer = NostrSigner.keys(keys);
+    let client = new Client(signer);
+    // ANCHOR_END: client
+
+    // ANCHOR: connect
+    await client.addRelay("wss://relay.damus.io")
+
+    await client.connect();
+    // ANCHOR_END: connect
+
+    // ANCHOR: publish
+    let builder = EventBuilder.textNote("Hello, rust-nostr!", []);
+    await client.sendEventBuilder(builder);
+    // ANCHOR_END: publish
+}
+// ANCHOR_END: full

book/src/sdk/hello.md

@@ -26,7 +26,9 @@ Now that you’ve installed the SDK, it’s time to write your first nostr progr
 <div slot="title">JavaScript</div>
 <section>
 
-TODO
+```typescript,ignore
+{{#include ../../snippets/js/src/hello.ts:client}}
+```
 
 </section>
 
@@ -78,7 +80,9 @@ TODO
 <div slot="title">JavaScript</div>
 <section>
 
-TODO
+```typescript,ignore
+{{#include ../../snippets/js/src/hello.ts:connect}}
+```
 
 </section>
 
@@ -131,7 +135,9 @@ TODO
 <div slot="title">JavaScript</div>
 <section>
 
-TODO
+```typescript,ignore
+{{#include ../../snippets/js/src/hello.ts:publish}}
+```
 
 </section>
 
@@ -183,7 +189,9 @@ TODO
 <div slot="title">JavaScript</div>
 <section>
 
-TODO
+```typescript,ignore
+{{#include ../../snippets/js/src/hello.ts:full}}
+```
 
 </section>