Bootstrap with Vue (bootstrap-vue-next) - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ rendering

intermediate

What is the rendered output of this Bootstrap Vue button?

Consider this Vue component using bootstrap-vue-next:

<template>
  <b-button variant="success">Save</b-button>
</template>

What will the button look like in the browser?

Bootsrap

<template>
  <b-button variant="success">Save</b-button>
</template>

A A plain button with no special styling and label 'Save'.

B A red button with the label 'Save' styled by Bootstrap's danger variant.

C A green button with the label 'Save' styled by Bootstrap's success variant.

D A disabled button with the label 'Save'.

💡 Hint

Bootstrap's 'success' variant applies a green color style to buttons.

The component with variant 'success' renders a green Bootstrap-styled button labeled 'Save'.

❓ selector

intermediate

Which CSS class does b-alert use for a warning alert?

In bootstrap-vue-next, the b-alert component shows alerts with different styles.
Which option correctly shows the CSS class applied for a warning alert?

A alert-warning

B alert-danger

C alert-info

D alert-primary

💡 Hint

Bootstrap uses 'alert-' prefix followed by the alert type name.

The 'warning' variant applies the 'alert-warning' CSS class to the alert component.

🧠 Conceptual

advanced

What happens if you omit the v-model on a b-form-input?

Given this code snippet:

<b-form-input type="text" />

What is the effect of not using v-model on this input component?

Bootsrap

<template>
  <b-form-input type="text" />
</template>

A The input will automatically bind to a default data property.

B The input will throw a runtime error because v-model is required.

C The input will be disabled by default.

D The input will render but will not update any data or reflect changes in the Vue component.

💡 Hint

v-model connects input value to Vue data for two-way binding.

Without v-model, the input works visually but does not update or reflect any Vue data property.

❓ layout

advanced

How does b-row and b-col create responsive layouts?

In bootstrap-vue-next, what is the main purpose of using b-row and b-col components together?

A They create fixed-width columns that do not change on different devices.

B They create a grid layout that adjusts column widths based on screen size for responsiveness.

C They only add margin and padding but do not affect layout.

D They automatically hide content on small screens.

💡 Hint

Bootstrap grid uses rows and columns to build flexible layouts.

b-row and b-col implement Bootstrap's grid system, allowing columns to resize and stack on different screen sizes.

❓ accessibility

expert

Which attribute improves accessibility for a b-modal component?

When using b-modal from bootstrap-vue-next, which attribute should you add to improve screen reader accessibility?

Bootsrap

<template>
  <b-modal id="myModal" aria-labelledby="myModalLabel">
    <template #modal-title>
      <h5 id="myModalLabel">Example Modal</h5>
    </template>
    Modal content here.
  </b-modal>
</template>

A aria-labelledby="myModalLabel" with a matching element id inside the modal

B tabindex="-1" on the modal content

C role="button" on the modal container

D aria-hidden="true" on the modal

💡 Hint

Screen readers use aria-labelledby to identify modal titles.

Adding aria-labelledby pointing to the modal's title element helps screen readers announce the modal properly.

Practice

1. What is the main purpose of bootstrap-vue-next in a Vue 3 application?

easy

A. To replace Vue 3 with Bootstrap framework

B. To create backend APIs using Bootstrap

C. To convert Bootstrap CSS into JavaScript code

D. To easily use Bootstrap styles and components inside Vue 3 apps

Solution

1. Step 1: Understand BootstrapVue Next role

   BootstrapVue Next is a library that integrates Bootstrap styles and components into Vue 3 apps.

2. Step 2: Eliminate incorrect options

   Options A, C, and D describe unrelated or incorrect uses of BootstrapVue Next.

3. Final Answer:

   To easily use Bootstrap styles and components inside Vue 3 apps -> Option D

4. Quick Check:

   BootstrapVue Next = Bootstrap + Vue 3 integration [OK]

Hint: Remember: BootstrapVue Next adds Bootstrap to Vue 3 apps [OK]

Common Mistakes:

• Thinking it replaces Vue 3
• Confusing CSS with JavaScript conversion
• Assuming it builds backend APIs

2. Which of the following is the correct way to import Bootstrap CSS in a Vue 3 project using bootstrap-vue-next?

easy

A. import 'bootstrap-vue-next/dist/css/bootstrap.css';

B. import 'bootstrap/dist/css/bootstrap.min.css';

C. import 'vue/dist/css/bootstrap.css';

D. import 'bootstrap-vue-next/css/bootstrap.min.js';

Solution

1. Step 1: Identify Bootstrap CSS import

   The official Bootstrap CSS file is imported from 'bootstrap/dist/css/bootstrap.min.css'.

2. Step 2: Check other options

   import 'bootstrap-vue-next/dist/css/bootstrap.css'; is incorrect because bootstrap-vue-next does not provide CSS files directly. import 'vue/dist/css/bootstrap.css'; is wrong as Vue does not have Bootstrap CSS. import 'bootstrap-vue-next/css/bootstrap.min.js'; imports a JS file, not CSS.

3. Final Answer:

   import 'bootstrap/dist/css/bootstrap.min.css'; -> Option B

4. Quick Check:

   Bootstrap CSS import path = 'bootstrap/dist/css/bootstrap.min.css' [OK]

Hint: Bootstrap CSS always comes from 'bootstrap/dist/css' folder [OK]

Common Mistakes:

• Importing JS files instead of CSS
• Using bootstrap-vue-next for CSS import
• Confusing Vue package with Bootstrap CSS

3. Given the following Vue 3 component using bootstrap-vue-next:

<template>
  <b-button variant="primary">Click Me</b-button>
</template>

<script setup>
import { BButton } from 'bootstrap-vue-next';
</script>

What will be the visual result when rendered in the browser?

medium

A. A blue Bootstrap styled button labeled 'Click Me'

B. A plain HTML button with no styling

C. An error because BButton is not registered

D. A red button labeled 'Click Me'

Solution

1. Step 1: Understand component usage

   The <b-button> component from bootstrap-vue-next renders a Bootstrap styled button. The variant 'primary' applies the blue color.

2. Step 2: Check registration and rendering

   Since BButton is imported and used correctly, the button will render with Bootstrap's primary style (blue).

3. Final Answer:

   A blue Bootstrap styled button labeled 'Click Me' -> Option A

4. Quick Check:

   Bootstrap button variant 'primary' = blue button [OK]

Hint: Bootstrap 'primary' variant means blue button [OK]

Common Mistakes:

• Assuming no styling without global registration
• Confusing variant colors
• Thinking import alone causes error

4. Consider this Vue 3 setup using bootstrap-vue-next:

<script setup>
import { BAlert } from 'bootstrap-vue-next';
</script>

<template>
  <b-alert show>Warning message</b-alert>
</template>

The alert does not appear when running the app. What is the likely cause?

medium

A. BAlert component is imported but not registered globally or locally

B. The show attribute is invalid for BAlert

C. Bootstrap CSS is missing from the project

D. Vue 3 does not support bootstrap-vue-next components

Solution

1. Step 1: Check component import and usage

   BAlert is imported and used correctly with the show attribute, which is valid to display the alert.

2. Step 2: Consider missing Bootstrap CSS

   If Bootstrap CSS is not imported, components render without styles and may not appear as expected.

3. Final Answer:

   Bootstrap CSS is missing from the project -> Option C

4. Quick Check:

   Missing Bootstrap CSS = no visible styles [OK]

Hint: Always import Bootstrap CSS to see styled components [OK]

Common Mistakes:

• Assuming import auto-registers components globally
• Thinking 'show' attribute is invalid
• Believing Vue 3 is incompatible with bootstrap-vue-next

5. You want to create a responsive grid layout in Vue 3 using bootstrap-vue-next with two columns on large screens and one column on small screens. Which template code correctly achieves this?

hard

A. <template>
<b-row>
<b-col cols=12 lg=6>Column 1</b-col>
<b-col cols=12 lg=6>Column 2</b-col>
</b-row>
</template>

B. <template>
<b-row>
<b-col lg=12 cols=6>Column 1</b-col>
<b-col lg=12 cols=6>Column 2</b-col>
</b-row>
</template>

C. <template>
<b-row>
<b-col cols=6>Column 1</b-col>
<b-col cols=6>Column 2</b-col>
</b-row>
</template>

D. <template>
<b-row>
<b-col cols=12>Column 1</b-col>
<b-col cols=12>Column 2</b-col>
</b-row>
</template>

Solution

1. Step 1: Understand Bootstrap grid props

   Using cols=12 means full width on small screens, and lg=6 means half width on large screens.

2. Step 2: Check each option's column sizing

   <template> <b-row> <b-col cols=12 lg=6>Column 1</b-col> <b-col cols=12 lg=6>Column 2</b-col> </b-row> </template> correctly sets columns to full width on small and half width on large screens. Other options have incorrect prop values or missing responsive behavior. <template> <b-row> <b-col cols=12>Column 1</b-col> <b-col cols=12>Column 2</b-col> </b-row> </template> always uses full width.

3. Final Answer:

   <template> <b-row> <b-col cols=12 lg=6>Column 1</b-col> <b-col cols=12 lg=6>Column 2</b-col> </b-row> </template> -> Option A

4. Quick Check:

   cols=12 small + lg=6 large = responsive 1 or 2 columns [OK]

Hint: Use cols=12 for small, lg=6 for large screens in b-col [OK]

Common Mistakes:

• Mixing cols and lg values incorrectly
• Forgetting responsive props for different screen sizes
• Using only cols without breakpoints