Convert to upper case while typing, with some delay

Question

I used following codes to convert to upper case while typing.

      $(".input_capital").live('keypress', function(e)
      {
        var defaultStr = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
        var checkstr = $(this).val();
        var str1 = '';
        for (i = 0; i < checkstr.length; i++)
        {
            var ch = checkstr.charCodeAt(i);
             if (ch>=97 && ch<=122){
                str1 += defaultStr.charAt(ch-97);
             }else{
                str1 += checkstr.charAt(i);
              }
        }
        $(this).focus();
        $(this).val(str1);
     });

And the following code

  $(".input_capital").live('keypress', function(e)
  {
       $(this).val($(this).val().toUpperCase());
  });

all these above code is working fine. But for user able to view lower cases for some time. After that only its converting to upper case.

I tried with 'text-transform: uppercase' in css. But it is not working in Samsung tab with Android Os. Please anybody help me to achieve this by script.

Answer 1

you can try:

$(".input_capital").on('keydown', function(evt) {
  $(this).val(function (_, val) {
    return val + String.fromCharCode(evt.which).toUpperCase();
  });

  return false;
});​

http://jsfiddle.net/5gLyX/

It has some flaws, but I think the idea is clear, and can be build upon.

---

Better version, though mind the input event which is not supported in IE<9.

$('.input_capital').on('input', function(evt) {
  $(this).val(function(_, val) {
    return val.toUpperCase();
  });
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<textarea class='input_capital' rows='8'></textarea>