Bind class toggle to window scroll event

Thanks to Flek for answering my question in his comment:

http://jsfiddle.net/eTTZj/30/

<div ng-app="myApp" scroll id="page" ng-class="{min:boolChangeClass}">

    <header></header>
    <section></section>

</div>

app = angular.module('myApp', []);
app.directive("scroll", function ($window) {
    return function(scope, element, attrs) {
        angular.element($window).bind("scroll", function() {
             if (this.pageYOffset >= 100) {
                 scope.boolChangeClass = true;
             } else {
                 scope.boolChangeClass = false;
             }
            scope.$apply();
        });
    };
});