Vue Router Guard Failing to Work Properly After Page Reload

Question

Vue Router Guard Failing to Work Properly After Page Reload

I have implemented a router guard to protect certain pages in my app. The goal is for users to be prompted to log in when attempting to access these protected pages. Currently, the guard works as expected within the app itself. However, if a user refreshes the page or copies the URL and pastes it into a browser where they are already logged in, they should still be able to access the protected pages. Unfortunately, that is not happening at the moment, and I'm encountering this error: [vue-router] uncaught error during route navigation. My desired functionality is to redirect users to the login page if they try to access a guarded page without being logged in, but allow them to view the page if they are logged in.

beforeEnter: (to, from, next) => {
    if (!store.state.isUserLoggedIn) {
        next({
            path: '/login', // redirect to login page
            query: {
                redirectFrom: to.fullPath
            }
        })
    } else {
        next()
    }

javascript vue.js

Answer 1

Answer №1

To ensure secure navigation in your Vue.js application, it is recommended to implement Navigation Guards.

Within the index.js file of your router:

const ifNotAuthenticated = (to, from, next) => {
    if (!store.state.isUserLoggedIn) {
        next();
        return;
    }
    next("/"); 
};

const ifAuthenticated = (to, from, next) => {
    if (store.state.isUserLoggedIn) {
        next();
        return; 
    }
    next("/login");
};

const routes = [
    {
        path: "/home",
        name: "Home",
        component: Home,
        beforeEnter: ifAuthenticated,
      },
    {
        path: "/login",
        name: "Login",
        component: Login,
        beforeEnter: ifNotAuthenticated,
      }
]

The usage of beforeEnter function within the routes is crucial for determining an authenticated user's access control.

Answer 2

To ensure secure navigation in your Vue.js application, it is recommended to implement Navigation Guards.

Within the index.js file of your router:

const ifNotAuthenticated = (to, from, next) => {
    if (!store.state.isUserLoggedIn) {
        next();
        return;
    }
    next("/"); 
};

const ifAuthenticated = (to, from, next) => {
    if (store.state.isUserLoggedIn) {
        next();
        return; 
    }
    next("/login");
};

const routes = [
    {
        path: "/home",
        name: "Home",
        component: Home,
        beforeEnter: ifAuthenticated,
      },
    {
        path: "/login",
        name: "Login",
        component: Login,
        beforeEnter: ifNotAuthenticated,
      }
]

The usage of beforeEnter function within the routes is crucial for determining an authenticated user's access control.

Answer 3

Answer №2

Upon closer examination of the error messages I encountered, it became clear to me that the router guard was unable to detect the persistent Vuex state when the page is refreshed or when a user directly navigates to the URL. In response, I made the decision to switch the variable being evaluated by the router guard to determine if a user is logged in to a localStorage variable. However, even after this change, I faced difficulties when using a boolean variable. Therefore, I opted to use an integer instead, assigning the value of 1 for the logged-in state and 0 for the logged-out state. This adjustment proved to be successful, resolving the issue seamlessly. I hope this information proves helpful to anyone encountering a similar problem.

Answer 4

Upon closer examination of the error messages I encountered, it became clear to me that the router guard was unable to detect the persistent Vuex state when the page is refreshed or when a user directly navigates to the URL. In response, I made the decision to switch the variable being evaluated by the router guard to determine if a user is logged in to a localStorage variable. However, even after this change, I faced difficulties when using a boolean variable. Therefore, I opted to use an integer instead, assigning the value of 1 for the logged-in state and 0 for the logged-out state. This adjustment proved to be successful, resolving the issue seamlessly. I hope this information proves helpful to anyone encountering a similar problem.

Vue Router Guard Failing to Work Properly After Page Reload

Answer №1

Answer №2

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