3 o'clock javascript

Sun, 28 Mar 2010 00:00:00 +0000

I was writing some code to react at a textarea.onKeyUp. I take the size of the current textarea.val().length, update an element and do some other stuff.

yawn

The first version of the code looked like:

$('#message').keyup(function(e){
   $('#chars_num').html( new_len );
   $('#sms_num').html( Math.floor($('#message').val().length / 161) +1) );
});

Working good, but was clearly slow: every keystroke was “giving back the cursor” too slowly for a fast typer like me. I went to take a look at twitter, and their text box was WAY FASTER.

Late on Zio Ivan

3 o'clock javascript