Question

I have users typing in incredibly long strings, as below, is there a way in jquery to detect that a string is getting too long so that I can warn the user?

<textarea>xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx</textarea>

I’m thinking a keyup that checks the length since the last space (or since the beginning if no spaces)

Answer 1

Try this:

It checks the string length of word since last space.

$('#test').keyup(function() {
    var string = $(this).val();
    var n = $(this).val().lastIndexOf(" ");

    var lastword= string.substring(n+1, string.length);

    if(lastword.length > 10) {
      alert('Too long');        
    }     
});​

DEMO