javascript - Determine whether an event is invoked by .trigger() -

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is there way determine whether or not .change function below being called jquery .trigger? 

    $('input[name=transactiontype]').change(function () {         //clear out values         $('input:text').val('');         $('input:text').text('');          //display input fields         var radiovalue = $(this);          $('#rightdiv').children().each(function () {             if (radiovalue.attr('id') == $(this).attr('id')) {                 $(this).show();             } else {                 $(this).hide();             }         });     }).filter(':checked').trigger('change');

you can use event.istrigger

 $('input[name=transactiontype]').change(function (e) {     if(e.istrigger){       //this triggered using trigger('change') or .change() etc     }  }

demo

this flag set when triggered mentioned above otherwise may undefined. not able find documentation though.

but see being set in jquery code in trigger method.

 // trigger bitmask: & 1 native handlers; & 2 jquery (always true)  event.istrigger = onlyhandlers ? 2 : 3;

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