Can jQuery check whether input content has changed?

Question

Is it possible to bind javascript (jQuery is best) event to \"change\" form input value somehow?

I know about .change() method, but it does not trigger

Answer 1

Yes, compare it to the value it was before it changed.

var previousValue = $("#elm").val();
$("#elm").keyup(function(e) {
    var currentValue = $(this).val();
    if(currentValue != previousValue) {
         previousValue = currentValue;
         alert("Value changed!");
    }
});

Another option is to only trigger your changed function on certain keys. Use e.KeyCode to figure out what key was pressed.