RouterView for rendering in Vue - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ component_behavior

intermediate

What does render in Vue Router?

In a Vue 3 app using Vue Router, what does the <RouterView> component render?

A It renders the matched component for the current route.

B It renders a navigation menu automatically.

C It renders all components registered in the router.

D It renders only the root component regardless of route.

💡 Hint

Think about how Vue Router shows different pages based on the URL.

The <RouterView> component acts as a placeholder that Vue Router fills with the component matching the current route. It does not render menus or all components, only the one for the active route.

❓ state_output

intermediate

What is the output when nested is used?

Given this route setup with nested routes, what will the nested <RouterView> render?

const routes = [
  { path: '/parent', component: Parent, children: [
    { path: 'child', component: Child }
  ]}
]

If the URL is /parent/child, what does the nested <RouterView> inside Parent render?

A It renders both <code>Parent</code> and <code>Child</code> components side by side.

B It renders the <code>Child</code> component.

C It renders nothing because nested routes don't work.

D It renders the <code>Parent</code> component again.

💡 Hint

Nested <RouterView> shows the child route's component inside the parent.

When using nested routes, the <RouterView> inside the parent component renders the matched child component. So at /parent/child, the nested <RouterView> renders Child.

📝 Syntax

advanced

Identify the correct way to use with named views

Which option correctly uses <RouterView> to render a named view called sidebar?

A <RouterView view="sidebar" />

B <RouterView slot="sidebar" />

C <RouterView name="sidebar" />

D <RouterView slotName="sidebar" />

💡 Hint

Vue Router uses a specific prop name for named views.

The name prop on <RouterView> specifies which named view to render. Other props like slot or view are not valid.

🔧 Debug

advanced

Why does not render any component?

In a Vue 3 app, the <RouterView> is empty and shows no content. The routes are defined as:

const routes = [
  { path: '/home', component: Home }
]

The URL is /home. What is the most likely reason <RouterView> renders nothing?

A The router is not properly installed or the app is missing <code>use(router)</code>.

B The <code>Home</code> component is empty and renders nothing.

C The route path should be <code>'home'</code> without the slash.

D The <code>&lt;RouterView&gt;</code> must be inside <code>&lt;router-link&gt;</code> to work.

💡 Hint

Check if the router is connected to the Vue app.

If the router is not installed with app.use(router), the <RouterView> has no route info and renders nothing. The other options are incorrect because the component can be empty but still render, <RouterView> does not require <router-link>, and route paths must start with a slash.

🧠 Conceptual

expert

How does support route transitions?

In Vue Router, how can <RouterView> be used to animate page transitions between routes?

A Set a global router option to enable automatic route animations.

B Add a <code>transition</code> prop directly on <code>&lt;RouterView&gt;</code> to enable animations.

C Use CSS animations on <code>&lt;RouterView&gt;</code> without any wrapper components.

D Wrap <code>&lt;RouterView&gt;</code> inside a <code>&lt;Transition&gt;</code> component to animate route changes.

💡 Hint

Think about how Vue handles animations for dynamic components.

Vue Router does not animate routes by itself. Wrapping <RouterView> in Vue's <Transition> component allows you to animate the entering and leaving of route components. There is no transition prop on <RouterView>, and CSS alone won't handle component lifecycle animations properly. No global router option exists for this.

Practice

1. What is the main purpose of RouterView in a Vue application?

easy

A. To define routes and their components

B. To display the component that matches the current route URL

C. To style the navigation bar

D. To fetch data from an API

Solution

1. Step 1: Understand RouterView role

   RouterView is a placeholder that Vue Router uses to show the component for the current URL.

2. Step 2: Differentiate from other router parts

   Defining routes is done in the router config, not in RouterView. Styling and data fetching are unrelated.

3. Final Answer:

   To display the component that matches the current route URL -> Option B

4. Quick Check:

   RouterView shows current page = A [OK]

Hint: RouterView shows the page for the URL [OK]

Common Mistakes:

• Confusing RouterView with route definitions
• Thinking RouterView styles navigation
• Assuming RouterView fetches data

2. Which of the following is the correct way to use RouterView in a Vue component template?

easy

A.

B.

C.

D.

Solution

1. Step 1: Recall Vue Router syntax

   The official tag for rendering matched components is <router-view> in kebab-case.

2. Step 2: Check case sensitivity

   Vue components and tags are case-sensitive. RouterView (PascalCase) is not valid in templates, nor is routerView or router_view.

3. Final Answer:

   <router-view></router-view> -> Option C

4. Quick Check:

   Use kebab-case tag [OK]

Hint: Use lowercase with dash: [OK]

Common Mistakes:

• Using PascalCase <RouterView> in template
• Using camelCase or underscores in tag name
• Forgetting closing tag

3. Given this Vue Router setup and component usage, what will be rendered inside <router-view> when the URL is /about?

const routes = [
  { path: '/', component: Home },
  { path: '/about', component: About }
];

// In App.vue template:
// <router-view></router-view>

medium

A. The About component content

B. The Home component content

C. Nothing, because no component is matched

D. An error because routes are not defined properly

Solution

1. Step 1: Match URL to route

   The URL /about matches the route with path /about which uses the About component.

2. Step 2: Understand RouterView rendering

   <router-view> renders the component for the matched route, so it will show About's content.

3. Final Answer:

   The About component content -> Option A

4. Quick Check:

   URL /about shows About component [OK]

Hint: RouterView shows component for current URL [OK]

Common Mistakes:

• Assuming root component always shows
• Thinking RouterView shows nothing if not root
• Believing routes need special syntax to match

4. What is wrong with this Vue component template using RouterView?

<template>
  <div>
    <RouterView />
  </div>
</template>

medium

A. The RouterView tag should be lowercase as router-view

B. RouterView cannot be self-closing

C. RouterView must be inside a <router> tag

D. RouterView requires a slot to render content

Solution

1. Step 1: Check tag casing rules

   In Vue templates, the router-view component must be written in kebab-case, all lowercase with a dash.

2. Step 2: Validate other options

   Self-closing is allowed in Vue 3. There is no <router> tag, and router-view does not require slots to render matched components.

3. Final Answer:

   The <RouterView> tag should be lowercase as <router-view> -> Option A

4. Quick Check:

   Use lowercase tag [OK]

Hint: Use lowercase , not PascalCase [OK]

Common Mistakes:

• Writing <RouterView> instead of
• Thinking self-closing is invalid
• Expecting a <router> wrapper tag

5. You want to create a nested route in Vue where /dashboard shows a Dashboard component and inside it, /dashboard/settings shows a Settings component. How should you use RouterView to render the nested Settings component inside Dashboard?

hard

A. Place <router-view> only in the main App.vue template

B. Nest <router-view> inside <router-link> in Dashboard

C. Use two <router-view> tags side by side in App.vue

D. Place <router-view> inside the Dashboard component template where Settings should appear

Solution

1. Step 1: Understand nested routes rendering

   Nested routes render their child components inside the parent's RouterView. So Dashboard must have a <router-view> to show Settings.

2. Step 2: Check other options

   Placing RouterView only in App.vue won't render nested children inside Dashboard. Two side-by-side RouterView tags or nesting inside router-link are incorrect usage.

3. Final Answer:

   Place <router-view> inside the Dashboard component template where Settings should appear -> Option D

4. Quick Check:

   Nested routes need RouterView inside parent [OK]

Hint: Put inside parent component for nested routes [OK]

Common Mistakes:

• Not placing RouterView inside parent component
• Trying to render nested routes only in App.vue
• Misusing router-link as container