Byte counting in javascript

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I am making a word count, more specifically btye count for my text editor. However, I'm making it so that it counts Korean as well (as 2 bytes).

But I need to make it so that it does not count characters such as ` # = { } ( ) etc...

I've gotten this far, but I do not know how to get further from here. Right now it does everything but what I want it to do. Thank you!

    var limit_length = 1000;
    var msg_length = 0;
     
    //String bytes() Function
    String.prototype.bytes = function() {
        var msg = this;
        var cnt = 0;
     
        //Korean 2, English 1 count increment
        for( var i=0; i< msg.length; i++) 
            cnt += (msg.charCodeAt(i) > 128 ) ? 2 : 1;  
            return cnt;
        }

        //#submit-content Key up activation
        $("#submit-content").keyup(function( e ){
            msg_length = $.trim($(this).val()).bytes(); //to trim whitespaces 
         
            if( msg_length <= limit_length ) {     
                $("#type_num").css("color", "#474646");    
                $("#type_num").html( msg_length );  
            }
            else {
                $("#type_num").css("color", "#E55451");   
                $("#type_num").html( msg_length );   
            }
    });

asked 33 secs ago

Sang Yoo Kim

26

Byte counting in javascript