How do I trigger an onChange event for a hidden field?

问题

I want to fire an onChange event for hidden field, Most of the forums I've read suggests that onChange doesn't work for hidden fields, So is there a way around for that, something like Plan-B?

回答1:

In jQuery, you could trigger a custom event:

$("#hidden_input_id").trigger("special-change");

And you can listen with:

$("#hidden_input_id").on("special-change", function () {

});

DEMO: http://jsfiddle.net/byKak/

Reference:

• .trigger(): http://api.jquery.com/trigger/

来源：https://stackoverflow.com/questions/16601556/how-do-i-trigger-an-onchange-event-for-a-hidden-field