event.isDefaultPrevented()

event.isDefaultPrevented()Returns: Boolean

Description: Returns whether event.preventDefault() was ever called on this event object.

Example:

Checks whether event.preventDefault() was called.

$( "a" ).click(function( event ) {
  alert( event.isDefaultPrevented() ); // false
  event.preventDefault();
  alert( event.isDefaultPrevented() ); // true
});

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Licensed under the MIT License.
https://api.jquery.com/event.isDefaultPrevented