In this case, e refers to the Event object, which is passed to all event handlers by jQuery. This differs to a standard Event object in that jQuery normalizes many properties for cross-browser consistency.
One extremely handy tip is that you can type http://api.jquery.com/methodName and you'll get shown the documentation for that method; try it out;
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查看官方 jQuery 文档。
在本例中，
e指的是事件对象，它由 jQuery 传递给所有事件处理程序。这与标准 Event 对象不同，因为 jQuery 标准化了许多属性以实现跨浏览器一致性。一个极其方便的提示是，您可以输入 http:// api.jquery.com/methodName，您将看到该方法的文档；尝试一下；
mousedown()函数attr()http://api.jquery.com/attr > 函数length成员...你明白了；）。
Check out the official jQuery documentation.
In this case,
erefers to the Event object, which is passed to all event handlers by jQuery. This differs to a standard Event object in that jQuery normalizes many properties for cross-browser consistency.One extremely handy tip is that you can type http://api.jquery.com/methodName and you'll get shown the documentation for that method; try it out;
mousedown()functionattr()functionlengthmember... you get the idea ;).
e 是一个事件对象，它包含引起该事件的事件的详细信息传递给函数。
这些属性会有所不同，具体取决于最初引发事件的原因，请参阅 JQuery 文档了解更多详细信息：
http://api.jquery.com/category/events/event-object/
e is an event object that gets passed to the function with details of the event that caused it.
The properties will be different depending on what raised the event in the first place, see the JQuery documentation for more details:
http://api.jquery.com/category/events/event-object/
docs.jquery.com
从 mousedown 页面：
它是一个 eventObject< /a>.
docs.jquery.com
From the mousedown page:
It is an eventObject.
jQAPI - 替代 jQuery 文档具有离线
HTML和AIR版本。jQAPI - Alternative jQuery Documentation has offline
HTMLandAIRversion.