diff --git a/js/quad-ws.js b/js/quad-ws.js
index aff48ba..1a16988 100644
--- a/js/quad-ws.js
+++ b/js/quad-ws.js
@@ -70,7 +70,7 @@ function ws_write(id, ptr, len) {
     return false;
 }
 function ws_available(id) {
-    if (ws[id].received.length == 0) return -1;
+    if (ws[id] != null || ws[id].received.length == 0) return -1;
     return ws[id].received[0].length;
 }
 
diff --git a/src/lib.rs b/src/lib.rs
index 6a90d3d..383c44d 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -24,8 +24,8 @@ impl QuadWs {
             channel: ws_open_rust(url).unwrap(),
         }
     }
-    pub fn write(&mut self) -> bool {
-        ws_write_rust(&mut self.channel, vec![])
+    pub fn write(&mut self, data: Vec<u8>) -> bool {
+        ws_write_rust(&mut self.channel, data)
     }
     pub fn close(&mut self) {
         ws_close_rust(&mut self.channel)
diff --git a/src/wasm.rs b/src/wasm.rs
index 8a72e9c..d49d78b 100644
--- a/src/wasm.rs
+++ b/src/wasm.rs
@@ -32,8 +32,8 @@ pub fn ws_read_rust(socket: &mut WsChannnel) -> Option<Vec<u8>> {
     if available < 0 {
         return None;
     }
-    let mut buffer = vec![0; available as usize];
-    unsafe { ws_read(*socket, buffer.as_mut_ptr(), available as u32) };
+    let buffer = vec![0; available as usize];
+    unsafe { ws_read(*socket, buffer.as_ptr(), available as u32) };
     return Some(buffer);
 }