Send message to all participants on Enter key pressed

show.html.haml

//To send messages
  var txtMsg = document.querySelector("#txtMsg")
  
  $("#txtMsg").keydown(function(event){
    if(event.keyCode == 13){
      session.signal({
        type: "chat",
        data: txtMsg.value
      }, function(error){
       if(error){
          console.log("signal error (" + error.code + "): " + error.message);
        }else{
          txtMsg.value = "";
         }
       }
      );
    }
  }).focus(function(){
    this.value = "";
  }).blur(function(){
    if(this.value == ""){
      this.attr("placeholder", "Hit Enter key to send your message...");
    }
  });