diff --git a/src/apps/chat.html b/src/apps/chat.html
index 8b3b616..f92c6e6 100644
--- a/src/apps/chat.html
+++ b/src/apps/chat.html
@@ -8,7 +8,14 @@
         <div id="users"></div>
         <div id="msgs"></div>
         <form id="send">
-            <input id="sendcontent" name="content" autofocus required />
+            <input
+                id="sendcontent"
+                name="content"
+                autofocus
+                required
+                minlength="1"
+                maxlength="500"
+            />
             <input type="submit" value="Send" />
         </form>
     </body>
diff --git a/src/apps/chat.js b/src/apps/chat.js
index a52a188..24df1ab 100644
--- a/src/apps/chat.js
+++ b/src/apps/chat.js
@@ -41,5 +41,7 @@ ws.onmessage = (event) => {
 document.getElementById("send").onsubmit = (event) => {
   event.preventDefault();
   // console.log(event, document.getElementById("sendcontent").value);
-  ws.send("send " + document.getElementById("sendcontent").value);
+  let content = document.getElementById("sendcontent");
+  ws.send("send " + content.value);
+  content.value = "";
 };
diff --git a/src/apps/chat.rs b/src/apps/chat.rs
index c60008b..c39d9f8 100644
--- a/src/apps/chat.rs
+++ b/src/apps/chat.rs
@@ -13,21 +13,20 @@ use crate::{apps::App, socket::ws::WsMsg};
 // Must be <= u8::MAX-1;
 pub const USERS_LEN: u8 = 4;
 
-const MSG_MAX_SIZE: usize = 10;
+const MSG_MAX_SIZE: usize = 500;
 #[derive(Debug, Serialize)]
 struct Msg<'a> {
     id: usize,
     author: u8,
     content: &'a str,
 }
-// {"id"=999999,"author"="","content"=""}
 
 const MSGS_SIZE: usize = 30;
 #[derive(Debug)]
 struct Msgs {
-    /// Memory layout with sizes in bytes : ...|content: len|len: 2|author+1: 1|...
-    /// `author=0` means theres no message, it's just padding and should be skipped.
-    /// No message is splitted
+    /// * Memory layout with sizes in bytes : ...|content: len|len: 2|author+1: 1|...
+    /// * `author=0` means theres no message, it's just padding and should be skipped.
+    /// * No message is splitted
     inner: [u8; MSGS_SIZE],
     /// next byte index
     head: usize,
@@ -53,7 +52,7 @@ impl Msgs {
         self.head += 3;
         self.next_msg += 1;
     }
-    // Iter messages from present to past
+    /// Iter messages from present to past
     fn iter(&self) -> MsgsIter {
         if self.head == 0 {
             MsgsIter {
@@ -181,7 +180,6 @@ impl App for ChatApp {
     }
     fn accept_ws(&self, path: &str) -> bool {
         path == "/"
-        // path.len() > 1 && path.len() <= 17
     }
     async fn handle_ws<'a, const BUF_SIZE: usize>(
         &'a mut self,
@@ -237,11 +235,6 @@ impl App for ChatApp {
     }
 }
 
-// #[derive(Deserialize)]
-// enum ClientMsg {
-//     ReqMsg(usize),
-// }
-
 pub async fn id_to_static_str(id: u8) -> &'static str {
     match id {
         0 => "0",