javascriptroom blog

Quiz about Styling in Next.js

Next.js has gained significant popularity in the React ecosystem due to its powerful features for building web applications, including its support for various styling techniques. Understanding how to style a Next.js application effectively is crucial for creating visually appealing and user - friendly interfaces. This blog aims to test your knowledge of styling in Next.js through a quiz, along with explanations of the concepts involved.

2026-07

Table of Contents#

  1. Question 1: Inline Styling in Next.js
  2. Question 2: CSS Modules in Next.js
  3. Question 3: Styled Components in Next.js
  4. Question 4: Global Styles in Next.js
  5. Question 5: Tailwind CSS in Next.js
  6. Conclusion
  7. References

Question 1: Inline Styling in Next.js#

Question#

Which of the following is the correct way to apply inline styling to a component in Next.js?

A. <div style="color: red;">Text</div> B. <div style={{color: 'red'}}>Text</div> C. <div style={color: 'red'}>Text</div> D. <div .style="color: red;">Text</div>

Answer#

The correct answer is B. In React and Next.js, inline styles are passed as JavaScript objects. The outer curly braces {} are used to insert JavaScript expressions into JSX, and the inner curly braces {} define the object itself. So, <div style={{color: 'red'}}>Text</div> is the correct syntax.

Common Practice#

Inline styles are useful for applying simple, dynamic styles that depend on component state or props. For example:

import React, { useState } from 'react';
 
const InlineStylingExample = () => {
    const [isHighlighted, setIsHighlighted] = useState(false);
    const textStyle = {
        color: isHighlighted ? 'blue' : 'black'
    };
    return (
        <div>
            <p style={textStyle}>This text may change color.</p>
            <button onClick={() => setIsHighlighted(!isHighlighted)}>Toggle Highlight</button>
        </div>
    );
};
 
export default InlineStylingExample;

Best Practice#

Limit the use of inline styles for complex styling, as they can make the code hard to read and maintain. They are best suited for simple, temporary style changes.

Question 2: CSS Modules in Next.js#

Question#

What is the main advantage of using CSS Modules in Next.js?

A. It allows you to write global CSS styles easily. B. It automatically minifies your CSS code. C. It scopes CSS classes locally to a component. D. It enables you to use Sass syntax in your CSS files.

Answer#

The correct answer is C. CSS Modules in Next.js generate unique class names for each component, which means that the styles defined in a CSS module are scoped only to the component that imports it. This helps avoid global CSS naming conflicts.

Common Practice#

To use CSS Modules in Next.js, create a CSS file with the .module.css extension. For example, create Button.module.css:

/* Button.module.css */
.button {
    background-color: blue;
    color: white;
    padding: 10px 20px;
    border: none;
    cursor: pointer;
}

Then, import and use it in a React component:

import styles from './Button.module.css';
 
const Button = () => {
    return <button className={styles.button}>Click me</button>;
};
 
export default Button;

Best Practice#

Use CSS Modules for component - specific styles. It makes the code more modular and easier to manage as the application grows.

Question 3: Styled Components in Next.js#

Question#

How can you define a styled component in Next.js using the styled-components library?

A.

import styled from 'styled-components';
const StyledButton = styled.button`
    background-color: blue;
    color: white;
`;

B.

import styled from 'styled-components';
const StyledButton = styled 'button' {
    background-color: blue;
    color: white;
}

C.

import styled from 'styled-components';
const StyledButton = {
    background-color: blue;
    color: white;
};

D.

import styled from 'styled-components';
const StyledButton = styled.button({
    backgroundColor: 'blue',
    color: 'white'
});

Answer#

The correct answers are A and D.

  • In option A, styled-components uses tagged template literals to define styles. You can write CSS directly inside the backticks.
  • In option D, you can also use an object to define the styles, which is more similar to inline styles in React but scoped to the styled component.

Common Practice#

import styled from 'styled-components';
 
const StyledHeader = styled.h1`
    color: red;
    font-size: 32px;
`;
 
const App = () => {
    return <StyledHeader>Welcome to my Next.js App</StyledHeader>;
};
 
export default App;

Best Practice#

Use styled-components when you need to create complex, reusable components with dynamic styles based on props. For example:

import styled from 'styled-components';
 
const StyledButton = styled.button`
    background-color: ${props => props.primary? 'blue' : 'gray'};
    color: white;
`;
 
const ButtonComponent = () => {
    return (
        <div>
            <StyledButton primary>Primary Button</StyledButton>
            <StyledButton>Secondary Button</StyledButton>
        </div>
    );
};
 
export default ButtonComponent;

Question 4: Global Styles in Next.js#

Question#

Where should you import global CSS styles in a Next.js application?

A. In every individual component file. B. In the _app.js file. C. In the index.js file. D. In a separate utility function file.

Answer#

The correct answer is B. In Next.js, the _app.js file is a special file that wraps all pages. Importing global CSS styles in _app.js ensures that the styles are applied globally across all pages in the application.

Common Practice#

First, create a global CSS file, for example, global.css:

/* global.css */
body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
}

Then, import it in _app.js:

// _app.js
import '../styles/global.css';
 
function MyApp({ Component, pageProps }) {
    return <Component {...pageProps} />;
}
 
export default MyApp;

Best Practice#

Keep global styles minimal and use component - specific styling techniques (like CSS Modules or styled-components) for most of the styling needs to avoid CSS conflicts.

Question 5: Tailwind CSS in Next.js#

Question#

Which of the following steps is necessary to integrate Tailwind CSS with a Next.js application?

A. Install Tailwind CSS and its peer dependencies. B. Configure Tailwind CSS by creating a tailwind.config.js file. C. Import the Tailwind CSS styles in your application. D. All of the above.

Answer#

The correct answer is D. To integrate Tailwind CSS with a Next.js application, you need to perform all these steps:

  1. Install Tailwind CSS and its peer dependencies using a package manager like npm or yarn. For example: npm install -D tailwindcss postcss autoprefixer
  2. Configure Tailwind CSS by creating a tailwind.config.js file using the command npx tailwindcss init. You can then customize the configuration according to your needs.
  3. Import the Tailwind CSS styles in your application. Usually, you import them in a global CSS file and import that global CSS file in _app.js.

Common Practice#

After installation and configuration, you can use Tailwind CSS classes in your components. For example:

const TailwindButton = () => {
    return (
        <button className="bg-blue-500 hover:bg-blue-700 text-white font-bold py-2 px-4 rounded">
            Click me
        </button>
    );
};
 
export default TailwindButton;

Best Practice#

Use Tailwind CSS classes to quickly prototype and build your application. You can also customize the tailwind.config.js file to match your project's design requirements.

Conclusion#

Styling in Next.js offers a variety of techniques, each with its own advantages and use cases. By understanding these concepts and practicing through quizzes like this, you can become more proficient in creating well - styled Next.js applications. Whether you prefer inline styles, CSS Modules, styled-components, global styles, or Tailwind CSS, choosing the right approach for your project will lead to better maintainability and a more visually appealing user experience.

References#