JSFiddle - React, Tailwind, and code Playground

by gnel

HTML

<input type="text" id="TxtMessage" placeholder="Message" onKeyup="SendMsg(event)">

JavaScript

function SendMsg(e)
{
var message = document.getElementById("TxtMessage");
var charCode = typeof e.which == "number" ? e.which : e.keyCode;
alert(charCode);
if(e.keyCode == 38) { message.value = PreviousMessage; return;  };
if(e.keyCode !=13) return;

if(message.value !=null && message.value !="")
{
    var json = {"message": message.value};
    json = JSON.stringify(json);
    ws.send(json);
    PreviousMessage = message.value;
    message.value = "";
    message.focus();
}
else
{
    CAlert("Message cannot be empty.", false, true);    
}
}