How do I put a localStorage var inside my ng-show ? (Angular JS/Firebase)

问题

SITUATION:

When I load a page and didn't log in yet, everything works fine and I only see Login and Register in my nav as should be the case.

But when I log in and I load any page, the nav will stay for about 0.5 to 1 seconds in a strange state where "Register", "Log in", "Profile" and "Log out" all appear at the same time.

Then the nav appears as it should: showing only "Profile" and "Log out".

EDIT: ng-cloack fixed this, but profile and log out don't appear when I log in.

CODE:

header.ejs

<html ng-app = "app">
        <div ng-controller="ctrlHead">
          <ul class="nav navbar-nav">
                <li ng-show="!authenticated"><a href="/users/register">JOIN</a></li>
                <li ng-show="!authenticated"><a href="/users/login">Login</a></li>
                <li ng-show="authenticated"><a href="/users/profile">ME</a></li>
                <li ng-show="authenticated" onclick="signOut();"><a>Logout</a></li>
          </ul>
       </div>

QUESTION:

How do I input a localStorage var inside my ng-show ?

P.S.: header.ejs is an EJS partial that is loaded on all pages.

WHAT I TRIED:

This works but reloads the nav at each page, causing flickering.

app.factory("Auth", ["$firebaseAuth",
  function($firebaseAuth) {
    return $firebaseAuth();
  }
]);

app.controller("ctrlHead", ["$scope", "Auth", "$window",
  function($scope, Auth, $window) {
    $scope.auth = Auth;

    $scope.auth.$onAuthStateChanged(function(firebaseUser) {
        if (firebaseUser) {
            setAppCookie();
        }
        $scope.authenticated = firebaseUser;
    });
  }
]);

My try using localStorage:

app.factory("Auth", ["$firebaseAuth",
  function($firebaseAuth) {
    return $firebaseAuth();
  }
]);

app.controller("ctrlHead", ["$scope", "Auth", "$window",
  function($scope, Auth, $window) {
    $scope.authenticated = $window.localStorage.getItem("authenticated");
    $scope.auth = Auth;

    $scope.auth.$onAuthStateChanged(function(firebaseUser) {
        if (firebaseUser) {
            setAppCookie();
        }
        $window.localStorage.setItem("authenticated", firebaseUser);
        $scope.authenticated = $window.localStorage.getItem("authenticated");
    });
  }
]);

And now with ngCookies... Did not work :/ The nav is stuck in logged in mode regardless of auth state.

app.factory("Auth", ["$firebaseAuth",
  function($firebaseAuth) {
    return $firebaseAuth();
  }
]);

app.controller("ctrlHead", ["$scope", "Auth", "$cookies",
  function($scope, Auth, $cookies) {

    $scope.auth = Auth;

    $scope.auth.$onAuthStateChanged(function(firebaseUser) {

        if (firebaseUser) {
            setAppCookie();
            $cookies.put('authenticated', firebaseUser);
            $scope.authenticated = $cookies.get('authenticated');
        } else {
            $cookies.put('authenticated', firebaseUser);
            $scope.authenticated = $cookies.get('authenticated');
        }
    });

  }
]);

EDIT: I am now using angularfire and it works fine except for one thing, I need to store the authstate in localStorage. I have been trying with ng-storage and $window.localSorage but it didn't work...

回答1:

You can use the angular ng-cloak directive in order to prevent the AngularJS html template from being briefly displayed by the browser in its raw (uncompiled) form while your application is loading.

ngCloak documentation

<html ng-app="app" ng-cloak>
      <ul class="nav navbar-nav">
            <li ng-show="!authenticated"><a href="/users/register">JOIN</a></li>
            <li ng-show="!authenticated"><a href="/users/login">Login</a></li>
            <li ng-show="authenticated"><a href="/users/profile">ME</a></li>
            <li ng-show="authenticated" onclick="signOut();"><a>Logout</a></li>
      </ul>
</html>

You should use the $window service to access variable created outside of the scope of your controller. On top of that, you should not create the (almost) same controller twice.

$window documentation

Using something like that (not tested):

firebase.auth().onAuthStateChanged(function(user) {
    console.log("CURRENT USER:" + firebase.auth().currentUser);
    app.controller('ctrl', function($rootScope, $window) {
        $scope.authenticated = $window.user != null;
        setAppCookie();
        // Compile the whole <body> with the angular module named "app"
        angular.bootstrap(document.body, ['app']);
    });
});

For local storage, you just need to use the regular one:

//Set item
localStorage.setItem("authenticated", JSON.stringify(firebaseUser));

//Get item
$scope.authenticated = JSON.parse(localStorage.getItem("authenticated"));

回答2:

You have declared the $rootScope, but I don't see where you injected..

Remember all dependencies have to be injected through the $inject dependency..

    Var app = controller('mycontroller', ['$rootScope', function($rootScope) {
}]);

来源：https://stackoverflow.com/questions/41811343/how-do-i-put-a-localstorage-var-inside-my-ng-show-angular-js-firebase

标签

javascript

angularjs

firebase

firebase-authentication

angularfire