问如何检测用户是否在Angularjs中单击了浏览器的后退按钮

EN

app.run(function($rootScope, $location) {
    $rootScope.$on('$locationChangeSuccess', function() {
        if($rootScope.previousLocation == $location.path()) {
            console.log("Back Button Pressed");
        }
        $rootScope.previousLocation = $rootScope.actualLocation;
        $rootScope.actualLocation = $location.path();
    });
});

angular
    .module('app')
    .run(function($rootScope, $transitions) {

        // Track "previous state" to be used elsewhere to determine if the user
        // goes "back".
        $transitions.onStart({}, (transition) => {
            if ($rootScope._previousState === transition.$to().name) {
                $rootScope._isPreviousState = true;
            } else {
                $rootScope._isPreviousState = false;
            }
            $rootScope._previousState = transition.$from().name;
        });

    });

if ($rootScope._isPreviousState) {
    // ...reload some aspect of the controller state...
}