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How can I get jQuery .val() AFTER keypress event?

Asked 2010-06-17T16:06:56.997
104

I got:

$(someTextInputField).keypress(function() {
  alert($(this).val());
});

Now the alert always returns the value BEFORE the keypress (e.g. the field is empty, I type 'a' and the alert gives me ''. Then I type 'b' and the alert gives me 'a'...). But I want the value AFTER the keypress - how can I do that?

Background: I'd like to enable a button as soon as the text field contains at least one character. So I run this test on every keypress event, but using the returned val() the result is always one step behind. Using the change() event is not an option for me because then the button is disabled until you leave the text box. If there's a better way to do that, I'm glad to hear it!

javascript jquery forms events jquery-events
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1 Answer

5

Try something like this:

$('#someField').keypress(function() {
  setTimeout(function() {
    if ($('#someField').val().length > 0)
      $('#theButton').attr('disabled', false);
  }, 1);
});

That simply introduces a timeout so that after the "keypress" event loop completes, your code will run almost immediately thereafter. Such a short timer interval (even if rounded up by the browser) will not be noticeable.

edit — or you could use "keyup" like everybody else says, though its semantics are different.

answered 2010-06-17T16:12:17.790

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