Programmatic navigation with useRouter in Vue - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the router composable in Vue.

Vue

import { [1] } from 'vue-router';

Drag options to blanks, or click blank then click option'

AcreateRouter

BuseRoute

CuseRouter

Drouter

Attempts:

3 left

💡 Hint

Common Mistakes

Importing useRoute instead of useRouter

Trying to import createRouter which is for router creation

Using a lowercase 'router' which is not a function

The useRouter function is imported from vue-router to enable programmatic navigation.

2fill in blank

medium

Complete the code to get the router instance inside the setup function.

Vue

setup() {
  const router = [1]();
  return {};
}

Drag options to blanks, or click blank then click option'

AuseRouter

BuseRoute

CcreateRouter

Drouter

Attempts:

3 left

💡 Hint

Common Mistakes

Calling useRoute() which gives route info, not router

Trying to call createRouter() which is for creating router

Using a variable name instead of a function call

Inside setup, calling useRouter() returns the router instance for navigation.

3fill in blank

hard

Fix the error in the navigation call to go to '/home'.

Vue

router.[1]('/home');

Drag options to blanks, or click blank then click option'

Anavigate

Bgo

Credirect

Dpush

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'go' which is a window.history method, not Vue Router

Using 'navigate' which is not a Vue Router method

Using 'redirect' which is for route config, not navigation

The push method is used on the router instance to navigate to a new route programmatically.

4fill in blank

hard

Fill both blanks to navigate to a named route with params.

Vue

router.[1]({ name: '[2]', params: { id: 123 } });

Drag options to blanks, or click blank then click option'

Apush

Bhome

Cuser

Dreplace

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'replace' which replaces history instead of pushing

Using wrong route name like 'home' when 'user' is expected

Confusing method names

Use push to navigate and specify the route name as 'user' with params.

5fill in blank

hard

Fill all three blanks to navigate with query parameters.

Vue

router.[1]({ path: '/search', query: { q: '[2]' }, [3]: {} });

Drag options to blanks, or click blank then click option'

Apush

Bvue

Creplace

Dparams

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'replace' instead of 'push' when adding history

Putting query parameters in params instead of query

Leaving out the params key

Use push to navigate to '/search' with query 'q' set to 'vue' and include params key.

Practice

1. What does the useRouter function provide in a Vue 3 component?

easy

A. A method to style components dynamically

B. A way to fetch data from an API

C. Access to the router instance to navigate programmatically

D. A tool to manage component state

Solution

1. Step 1: Understand the purpose of useRouter

   useRouter is a Vue Router composable that gives access to the router instance inside setup functions.

2. Step 2: Identify what the router instance allows

   The router instance allows programmatic navigation, such as using router.push() to change routes.

3. Final Answer:

   Access to the router instance to navigate programmatically -> Option C

4. Quick Check:

   useRouter = router access [OK]

Hint: Remember: useRouter gives router control inside components [OK]

Common Mistakes:

• Thinking useRouter fetches data
• Confusing useRouter with state management
• Assuming useRouter styles components

2. Which of the following is the correct syntax to navigate to the '/home' route using useRouter in Vue 3?

easy

A. const router = useRouter(); router.change('/home');

B. const router = useRouter(); router.push('/home');

C. const router = useRouter(); router.navigate('/home');

D. const router = useRouter(); router.go('/home');

Solution

1. Step 1: Recall the method to change routes programmatically

   The correct method to navigate is router.push().

2. Step 2: Match the syntax with the correct method

   Only router.push('/home') is valid; other methods like go, navigate, or change do not exist on the router instance.

3. Final Answer:

   const router = useRouter(); router.push('/home'); -> Option B

4. Quick Check:

   router.push() navigates routes [OK]

Hint: Use router.push() to navigate routes programmatically [OK]

Common Mistakes:

• Using router.go() instead of router.push()
• Trying router.navigate() which is invalid
• Calling router.change() which doesn't exist

3. Consider this Vue 3 setup code snippet:

import { useRouter } from 'vue-router';
export default {
  setup() {
    const router = useRouter();
    function goToProfile() {
      router.push({ name: 'profile', params: { userId: 42 } });
    }
    return { goToProfile };
  }
}

What happens when goToProfile() is called?

medium

A. The app reloads the current page

B. Nothing happens because router.push requires a string path

C. An error occurs because params cannot be passed this way

D. The app navigates to the route named 'profile' with userId 42 as a parameter

Solution

1. Step 1: Understand router.push with named routes and params

   Using router.push({ name: 'profile', params: { userId: 42 } }) navigates to the route named 'profile' and passes the parameter userId=42.

2. Step 2: Confirm this is valid syntax and behavior

   This is the correct way to navigate to a named route with parameters in Vue Router.

3. Final Answer:

   The app navigates to the route named 'profile' with userId 42 as a parameter -> Option D

4. Quick Check:

   router.push({name, params}) navigates with params [OK]

Hint: Use object with name and params in router.push() for named routes [OK]

Common Mistakes:

• Thinking params can't be passed as object
• Assuming router.push only accepts string paths
• Confusing params with query parameters

4. Identify the error in this Vue 3 setup function using useRouter:

import { useRouter } from 'vue-router';
export default {
  setup() {
    const router = useRouter;
    function goHome() {
      router.push('/home');
    }
    return { goHome };
  }
}

medium

A. useRouter is not called as a function, missing parentheses

B. router.push should use an object, not a string

C. goHome function is not returned from setup

D. router.push is not a valid method

Solution

1. Step 1: Check how useRouter is assigned

   The code assigns const router = useRouter; without parentheses, so router is a reference to the function, not the router instance.

2. Step 2: Understand the impact on router.push call

   Since router is not the router instance, calling router.push() will cause an error because router is not an object with push method.

3. Final Answer:

   useRouter is not called as a function, missing parentheses -> Option A

4. Quick Check:

   Call useRouter() with () to get router instance [OK]

Hint: Always call useRouter() with parentheses to get router [OK]

Common Mistakes:

• Forgetting parentheses after useRouter
• Using string instead of object incorrectly (not error here)
• Not returning functions from setup (actually returned here)

5. You want to redirect users to the login page if they are not authenticated after clicking a button. Which Vue 3 setup code correctly uses useRouter for this programmatic navigation?

hard

A. const router = useRouter(); function checkAuth() { if (!isAuthenticated) router.push('/login'); }

B. const router = useRouter; function checkAuth() { if (!isAuthenticated) router.push('/login'); }

C. const router = useRouter(); function checkAuth() { if (!isAuthenticated) router.go('/login'); }

D. const router = useRouter(); function checkAuth() { if (!isAuthenticated) router.navigate('/login'); }

Solution

1. Step 1: Confirm correct useRouter call

   const router = useRouter(); function checkAuth() { if (!isAuthenticated) router.push('/login'); } correctly calls useRouter() with parentheses to get the router instance.

2. Step 2: Verify correct navigation method

   const router = useRouter(); function checkAuth() { if (!isAuthenticated) router.push('/login'); } uses router.push('/login'), which is the correct method to navigate programmatically.

3. Final Answer:

   const router = useRouter(); function checkAuth() { if (!isAuthenticated) router.push('/login'); } -> Option A

4. Quick Check:

   Call useRouter() and use router.push() for navigation [OK]

Hint: Call useRouter() and use router.push() to redirect [OK]

Common Mistakes:

• Not calling useRouter as a function
• Using router.go() or router.navigate() which don't exist
• Forgetting to check authentication before navigation