Listen to jQuery event without jQuery

问题

Is there a way to set up an event listener, so it captures an event fired by jQuery? I want to use only plain (vanilla) JavaScript to listen to the event.

I have set up the following example:

(function($) {

    $(document).on('sent_jquery_rec_jquery', function () {
        console.log('sent_jquery_rec_jquery');
    });

    $(document).on('sent_vanilla_rec_jquery', function () {
        console.log('sent_vanilla_rec_jquery');
    });

    document.addEventListener('sent_vanilla_rec_vanilla', function () {
        console.log('sent_vanilla_rec_vanilla');
    });

    document.addEventListener('sent_jquery_rec_vanilla', function () {
        console.log('sent_jquery_rec_vanilla');
    });

    document.dispatchEvent(new Event("sent_vanilla_rec_vanilla"));
    document.dispatchEvent(new Event("sent_vanilla_rec_jquery"));

    $(document).trigger('sent_jquery_rec_jquery');
    $(document).trigger('sent_jquery_rec_vanilla');

}(jQuery));

Three events which are received and logged are:

• sent_vanilla_rec_vanilla
• sent_vanilla_rec_jquery
• sent_jquery_rec_jquery

When the event is sent via $(document).trigger, the event listener set up with document.addEventListener does not kick in. What's the reason for that, and how can I make it work?

回答1:

JQuery apparently uses a custom event system, so you can't listen to jQuery events with a regular event listener. The aforementioned ticket mentions IE <9 as the culprit here, maybe jQuery 3 or 4 could make the switch.

来源：https://stackoverflow.com/questions/32502713/listen-to-jquery-event-without-jquery