Working with AngularJS DOM?

Question

Angular

There is a directive:

app.directive('selectionRating', function() {
    return {
        link: function($scope, element, attrs) {
            
            var tar = element.children();
            
            tar.bind('click', function() {
                
                this.addClass('second');
                
            });
            
            
        }
    }
});

There is an element in which there are several elements . By clicking on any of the elements, I need to change its class. How can i do this?
Everything I've tried doesn't work. These are addClass(), removeClass(). Even ordinary inserts into an element of type html().