gistfile1.txt

Ember.Route.reopen({
    enter: function() {
        this._super();
        var cssClass = this.toCssClass();
        if (cssClass === 'application') return; // not interesting to us
        Ember.$('body').addClass(cssClass);
    },
    exit: function() {
        this._super();
        Ember.$('body').removeClass(this.toCssClass());
    },
    toCssClass: function() {
        return this.routeName.dasherize();
    }
});