Jquery binding event on selected class

问题

Is it achievable in jquery to bind an event to a group of control that has certain class? It seems to me, it can't. I google a bit and all that came up are nothing to do with events. Here's how my code looks -

$('.numonly').bind('keypress',function(event){
    if (event.which > 31 && (event.which < 48 || event.which > 57)) return false;
});

回答1:

Your code should work, here's an example of it in action: http://jsfiddle.net/g3GsE/

Make sure that your code is wrapped like this so it doesn't execute until document.ready:

$(function() {
  $('.numonly').bind('keypress',function(event){
    if (event.which > 31 && (event.which < 48 || event.which > 57)) return false;
  });
});

Without this, it would execute immediately and the class="numonly" elements won't be there to find yet...the code needs to wait until document.ready so it fires after the elements are there, so the selector finds them.

回答2:

Yes this code should work just fine. Just make sure you double check it on the server when submitted. So those who disabled JS can't get around your limitation.

来源：https://stackoverflow.com/questions/2575420/jquery-binding-event-on-selected-class