backbone.whenthen:什么时候然后

骨干.whenthen 当<这些>然后<那些> 老实说，展示比告诉更容易。 //we have a Backbone.Events instance at our disposal in `app.vent` app . vent . on ( 'rolling' , function ( ) { console . log ( 'Here we go:' ) ; } ) ; var instruct = require ( 'backbone.whenthen' ) ; instruct ( app . vent ) . when ( 'event1' , 'event2' , 'event3' ) . then ( 'rolling' , function ( ) { console . log ( "We're ready to roll!!