I'm trying to do...
EventEmitter = require('events').EventEmitter
events = new EventEmitter()
events.emit.apply(null, ['eventname', 'arg1', 'arg2', 'arg3'])
...but it doesn't seem to work or throw an error, any help?
在Apply方法上,您需要通知两个参数:有效范围(该值在方法内部为“ this”)和参数数组。
I think the emit()
function of the EventEmitter is expecting this
to be an actual EventEmitter object. The following seems to work if you pass in the events
object.
events.emit.apply(events, ['eventname', 'arg1', 'arg2', 'arg3'])
Though at this point, might as well just call
emit('eventname', 'arg1', 'arg2', 'arg3')
I am guessing the emit()
method is looping over an internal list of registered events to see if there is a matching one. Not sure if this helps, just something I came across today working with events...
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