before and after filter support for backbone.js
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README.md
backbone_filters.js

README.md

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.