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How can I know in my triggering code that preventDefault has been called?
$(document).trigger('customEvent', params); if (/* ??? */) doDefaultActions(); 
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The event. preventDefault() method stops the default action of an element from happening. For example: Prevent a submit button from submitting a form. Prevent a link from following the URL.
The preventDefault() method cancels the event if it is cancelable, meaning that the default action that belongs to the event will not occur. For example, this can be useful when: Clicking on a "Submit" button, prevent it from submitting a form. Clicking on a link, prevent the link from following the URL.
preventDefault() prevents the default browser behavior for a given element. stopPropagation() stops an event from bubbling or propagating up the DOM tree.
There is no opposite method of event. preventDefault() to understand why you first have to look into what event. preventDefault() does when you call it. Underneath the hood, the functionality for preventDefault is essentially calling a return false which halts any further execution.
trigger() can also take an event object, so if you can create an event object, like so:
var event = jQuery.Event("customEvent"); $(document).trigger(event); then you can check after the trigger to see if preventDefault() has been called like so:
var prevented = event.isDefaultPrevented(); If you're asking how to find out whether or not the default has been prevented, use:
event.isDefaultPrevented()
This will return 'true' or 'false' based on whether or not preventDefault() was called.
EDIT: http://api.jquery.com/event.isDefaultPrevented/
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