Question

In my Chat application project, I am trying to restrict spaces when the user has just pressed Space and then Enter. pressing Enter will show entered Text into a div. Please see the comments in the code to understand clearly.

#txtmsg --> ID of TextBox field

---

$('#txtmsg').keypress(function (e)
{
    if (e.which == 13) 
    {
        //Disable default function of Enter key
        e.preventDefault(); 
        //Checks whether the user has entered any value or not
        if ($('#txtmsg').val().length > 0)  
        {
          //if(user has not entered only spaces....)?

           //transfers the entered value in the text field to div
            chat.server.send($('#txtmsg').val());
            $('#txtmsg').val('');
        }
    }
});

Answer 1

See http://api.jquery.com/jQuery.trim/ :

if($.trim($('#txtmsg').val()) !== "") { ... }