jQuery:如何将event.preventDefault()与自定义事件一起使用? [英] jQuery: How do I use event.preventDefault() with custom events?

问题描述

如何在触发代码中知道已调用preventDefault?

How can I know in my triggering code that preventDefault has been called?

$(document).trigger('customEvent', params);
if (/* ??? */)
    doDefaultActions();

推荐答案

trigger()也可以获取事件对象，因此，如果可以创建事件对象，就像这样:

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);

然后，您可以在触发器之后检查是否已按以下方式调用了preventDefault():

then you can check after the trigger to see if preventDefault() has been called like so:

var prevented = event.isDefaultPrevented();

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