Javascript change event on input element fires on only losing focus

Question

I have an input element and I want to keep checking the length of the contents and whenever the length becomes equal to a particular size, I want to enable the submit button

Answer 1

As an extention to katspaugh's answer, here's a way to do it for multiple elements using a css class.

   $('.myclass').each(function(){
        $(this).attr('oldval',$(this).val());
   });

   $('.myclass').on('change keypress paste focus textInput input',function(){
       var val = $(this).val();
       if(val != $(this).attr('oldval') ){
           $(this).attr('oldval',val); 
           checkLength($(this).val());
        }
    });