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Disclaimer: This fork has been updated to work with Backbone 0.5.3

Usage

Include backbone_filters.js after Backbone.

In your router you can now add:

before: {
	'^clerks' : function() {
		/* do stuff to all routes starting with 'clerks' */
		/* return false to halt execution */
	},
	'another reg ex' : function() { }
},

after: {
	'^clerks' : function() {
		/* do stuff */
	},
	'another reg ex' : function() { }	
}

Your filters will be called and if a filter returns false, the filter chain is halted. If a before filter chain is halted, the action in the Router will not be called. Your filters will receive the same arguments that get passed to the actions.