Redundant navigation errors and solutions in Vue Router

1. What is a redundant navigation error?

1.1 Error phenomenon

When using Vue Router for routing, developers may see the following error message in the browser's console:

:2053 Uncaught (in promise) Error: Avoided redundant navigation to current location: "/monitor/agent".
    at createRouterError (:2053:15)
    at createNavigationDuplicatedError (:2026:10)
    at  (:2186:18)
    at  (:2116:8)
    at  (:2586:10)
    at eval (:2904:22)
    at new Promise (<anonymous>)
    at  (:2903:12)
    at  (?!./node_modules/babel-loader/lib/!./node_modules/cache-loader/dist/?!./node_modules/vue-loader/lib/?!./src/views/common/?vue&type=script&lang=js&:68:20)
    at invokeWithErrorHandling (:1862:26)

It can be seen from the error message that Vue Router detected a redundant navigation operation, that is, trying to jump to the currently located routing address./monitor/agent。

1.2 Cause of error

Vue Router prevents duplicate navigation to the same routing address by default to avoid unnecessary routing jumps and component re-rendering. This design is designed to optimize performance and avoid repeated loading of the same component or triggering the same life cycle hook when the user clicks the same link or button multiple times.

However, in some cases, developers may inadvertently trigger such redundant navigation operations, such as:

• When the user clicks on a menu item, he jumps to the current route repeatedly.
• Repeated navigation was triggered incorrectly in the route guard.
• In dynamic routing, the routing address remains unchanged due to parameter changes, but navigation is triggered.

2. The impact of redundant navigation errors

2.1 Impact on user experience

While redundant navigation errors do not cause the application to crash, it outputs error messages in the console, which may affect the developer's debugging experience. In addition, if the error is not captured, it may cause the Promise chain to be interrupted, which in turn affects the execution of subsequent code.

2.2 Effect on performance

Repeated routing jumps trigger component re-rendering and execution of lifecycle hooks, which may result in unnecessary performance overhead. For example:

• beforeRouteUpdateandbeforeRouteLeaveThe hook will be called repeatedly.
• Component data requests may be triggered repeatedly.

3. Solution to solve redundant navigation errors

For redundant navigation errors, developers can adopt the following solutions:

3.1 Check the current route

Before navigating, check if the current route is the same as the target route. If the same is true, the navigation operation is skipped.

methods: {
    clickMenu() {
        if (this.$ !== '/monitor/agent') {
            this.$('/monitor/agent');
        }
    }
}

This method is simple and straightforward and works for most scenarios.

3.2 Catching Errors

If redundant navigation operations cannot be completely avoided, redundant navigation errors can be ignored by catching them.

methods: {
    clickMenu() {
        this.$('/monitor/agent').catch(err => {
            if ( !== 'NavigationDuplicated') {
                // If it is not a duplicate navigation error, throw another error                throw err;
            }
        });
    }
}

This approach ensures that redundant navigation errors do not affect the execution of other code.

3.3 Use the replace method

If you want to replace the current route record when navigating to the same route instead of adding a new history, you can usereplacemethod.

methods: {
    clickMenu() {
        this.$('/monitor/agent');
    }
}

This approach is suitable for scenarios where there is no need to keep history.

4. Practical application scenarios

4.1 Redundant Navigation in Dynamic Routing

In dynamic routing, the routing address may not change due to parameter changes, but navigation is triggered. For example:

//Routing configuration{
    path: '/user/:id',
    component: User
}

// Navigation operationthis.$('/user/1');
this.$('/user/1'); // Redundant navigation

In this case, redundant navigation can be avoided by checking routing parameters:

methods: {
    goToUser(id) {
        if (this.$ !== id) {
            this.$(`/user/${id}`);
        }
    }
}

4.2 Redundant navigation in routing guards

In the routing guard, redundant navigation may be caused by logical errors. For example:

((to, from, next) => {
    if ( === '/login' && !isAuthenticated) {
        next('/login'); // May cause redundant navigation    } else {
        next();
    }
});

In this case, redundant navigation can be avoided by checking the target route:

((to, from, next) => {
    if ( === '/login' && !isAuthenticated &&  !== '/login') {
        next('/login');
    } else {
        next();
    }
});

5. Summary

Redundant navigation errors are a common problem in Vue Router and are usually caused by repeated jumps to the current route. Although this error will not cause application crashes, it may affect the developer's debugging experience and application performance. Developers can effectively avoid or handle this error by checking the current route, catching an error, or using the replace method.

In actual development, developers should choose appropriate solutions based on specific scenarios, and combine them with functions such as route guarding and dynamic routing to ensure that the logic of route jump is correct and efficient. I hope that the content of this article can help developers better understand and deal with redundant navigation errors in Vue Router and improve the user experience and performance of the application.

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