trigger custom event without jQuery

问题

I'm triggering some DOM Events with jQuery triggerHandler()

<!DOCTYPE html>
<html>
<head>
  <title>stackoverflow</title>
  <script src="http://ajax.googleapis.com:80/ajax/libs/jquery/2.1.3/jquery.min.js"></script>
</head>

<body>
  <script>
    $(document).ready(function() {
      $(document).on('hey', function(customEvent, originalEvent, data) {
        console.log(customEvent.type + ' ' + data.user); // hey stackoverflow

      });

      // how to this in vanilla js
      $(document).triggerHandler('hey', [{}, {
        'user': 'stackoverflow'
      }])
    });
  </script>
</body>

</html>

How can I trigger this without jQuery?

Important: I need to know the event type and the custom data

回答1:

If you want an exact replication of jQuery's behaviour, you're probably best off digging through the jQuery source code.

If you just want to do normal event dispatching and listening, see CustomEvent for how to dispatch an event with custom data and addEventListener for how to listen to it.

Your example would probably look something like

document.addEventListener('hey', function(customEvent)
{
    console.log(customEvent.type + ' ' + customEvent.detail.user); // hey stackoverflow
});
document.dispatchEvent(new CustomEvent('hey', {'detail': {'user': 'stackoverflow'}}));

回答2:

You can use Custom Events and dispatch them on element you want.

回答3:

The quick & easy way:

$('#element').trigger("mycustomevent");

or for global event:

$(document).trigger("mycustomevent");

catching it:

$('#element').on("mycustomevent", function(e){
    // do something
});

来源：https://stackoverflow.com/questions/29898254/trigger-custom-event-without-jquery

标签

javascript

jquery

dom-events

jquery-triggerhandler