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Tailwind CSS 4.3 • Chapter 48

Tailwind with React

Every topic includes a plain-language explanation, exact steps, 10 practical examples, a hands-on example, expected output, common mistake, and practice task.

5 topics50 examples5 hands-on tasks10 Q&A
Practical course

48.1 className

className is part of the Tailwind CSS 4.3 workflow. Learn what the underlying CSS property or layout rule does first, then use the utility class to apply that rule consistently in markup.

Step by step

  1. Identify the CSS behavior behind className.
  2. Build a very small HTML example before placing it inside a large component.
  3. Apply the Tailwind utilities and inspect the result at multiple viewport widths.
  4. Add interaction, dark mode, RTL, or accessibility states when the component needs them.
  5. Refactor repeated markup into a reusable component only after the visual rule is understood.

10 practical examples

  1. Apply className to a course website and explain the decision you made.
  2. Apply className to a online store and explain the decision you made.
  3. Apply className to a banking app and explain the decision you made.
  4. Apply className to a school portal and explain the decision you made.
  5. Apply className to a clinic booking system and explain the decision you made.
  6. Apply className to a dashboard and explain the decision you made.
  7. Apply className to a restaurant site and explain the decision you made.
  8. Apply className to a mobile app and explain the decision you made.
  9. Apply className to a creator site and explain the decision you made.
  10. Apply className to a business landing page and explain the decision you made.

Hands-on example

export function Card(){return <article className="rounded-xl border p-6 shadow-sm">Card</article>}

Expected output

A working responsive example demonstrating className, with no page-wide overflow and clear behavior across breakpoints.

Common mistake: Using className as memorized class names without understanding the CSS behavior, responsive context, accessibility, or component structure.

Practice exercise

Create a fresh example for className using a different product, screen, component, or content set. Explain what changed and why.

48.2 Conditional Classes

Conditional Classes is part of the Tailwind CSS 4.3 workflow. Learn what the underlying CSS property or layout rule does first, then use the utility class to apply that rule consistently in markup.

Step by step

  1. Identify the CSS behavior behind Conditional Classes.
  2. Build a very small HTML example before placing it inside a large component.
  3. Apply the Tailwind utilities and inspect the result at multiple viewport widths.
  4. Add interaction, dark mode, RTL, or accessibility states when the component needs them.
  5. Refactor repeated markup into a reusable component only after the visual rule is understood.

10 practical examples

  1. Apply Conditional Classes to a course website and explain the decision you made.
  2. Apply Conditional Classes to a online store and explain the decision you made.
  3. Apply Conditional Classes to a banking app and explain the decision you made.
  4. Apply Conditional Classes to a school portal and explain the decision you made.
  5. Apply Conditional Classes to a clinic booking system and explain the decision you made.
  6. Apply Conditional Classes to a dashboard and explain the decision you made.
  7. Apply Conditional Classes to a restaurant site and explain the decision you made.
  8. Apply Conditional Classes to a mobile app and explain the decision you made.
  9. Apply Conditional Classes to a creator site and explain the decision you made.
  10. Apply Conditional Classes to a business landing page and explain the decision you made.

Hands-on example

<div class="flex flex-wrap items-center gap-4 rounded-xl border bg-white p-6 shadow-sm">
  <span class="font-semibold text-slate-900">Conditional Classes</span>
</div>

Expected output

A working responsive example demonstrating Conditional Classes, with no page-wide overflow and clear behavior across breakpoints.

Common mistake: Using Conditional Classes as memorized class names without understanding the CSS behavior, responsive context, accessibility, or component structure.

Practice exercise

Create a fresh example for Conditional Classes using a different product, screen, component, or content set. Explain what changed and why.

48.3 Component Props

Component Props is part of the Tailwind CSS 4.3 workflow. Learn what the underlying CSS property or layout rule does first, then use the utility class to apply that rule consistently in markup.

Step by step

  1. Identify the CSS behavior behind Component Props.
  2. Build a very small HTML example before placing it inside a large component.
  3. Apply the Tailwind utilities and inspect the result at multiple viewport widths.
  4. Add interaction, dark mode, RTL, or accessibility states when the component needs them.
  5. Refactor repeated markup into a reusable component only after the visual rule is understood.

10 practical examples

  1. Apply Component Props to a course website and explain the decision you made.
  2. Apply Component Props to a online store and explain the decision you made.
  3. Apply Component Props to a banking app and explain the decision you made.
  4. Apply Component Props to a school portal and explain the decision you made.
  5. Apply Component Props to a clinic booking system and explain the decision you made.
  6. Apply Component Props to a dashboard and explain the decision you made.
  7. Apply Component Props to a restaurant site and explain the decision you made.
  8. Apply Component Props to a mobile app and explain the decision you made.
  9. Apply Component Props to a creator site and explain the decision you made.
  10. Apply Component Props to a business landing page and explain the decision you made.

Hands-on example

<div class="flex flex-wrap items-center gap-4 rounded-xl border bg-white p-6 shadow-sm">
  <span class="font-semibold text-slate-900">Component Props</span>
</div>

Expected output

A working responsive example demonstrating Component Props, with no page-wide overflow and clear behavior across breakpoints.

Common mistake: Using Component Props as memorized class names without understanding the CSS behavior, responsive context, accessibility, or component structure.

Practice exercise

Create a fresh example for Component Props using a different product, screen, component, or content set. Explain what changed and why.

48.4 Lists

Lists is part of the Tailwind CSS 4.3 workflow. Learn what the underlying CSS property or layout rule does first, then use the utility class to apply that rule consistently in markup.

Step by step

  1. Identify the CSS behavior behind Lists.
  2. Build a very small HTML example before placing it inside a large component.
  3. Apply the Tailwind utilities and inspect the result at multiple viewport widths.
  4. Add interaction, dark mode, RTL, or accessibility states when the component needs them.
  5. Refactor repeated markup into a reusable component only after the visual rule is understood.

10 practical examples

  1. Apply Lists to a course website and explain the decision you made.
  2. Apply Lists to a online store and explain the decision you made.
  3. Apply Lists to a banking app and explain the decision you made.
  4. Apply Lists to a school portal and explain the decision you made.
  5. Apply Lists to a clinic booking system and explain the decision you made.
  6. Apply Lists to a dashboard and explain the decision you made.
  7. Apply Lists to a restaurant site and explain the decision you made.
  8. Apply Lists to a mobile app and explain the decision you made.
  9. Apply Lists to a creator site and explain the decision you made.
  10. Apply Lists to a business landing page and explain the decision you made.

Hands-on example

<div class="flex flex-wrap items-center gap-4 rounded-xl border bg-white p-6 shadow-sm">
  <span class="font-semibold text-slate-900">Lists</span>
</div>

Expected output

A working responsive example demonstrating Lists, with no page-wide overflow and clear behavior across breakpoints.

Common mistake: Using Lists as memorized class names without understanding the CSS behavior, responsive context, accessibility, or component structure.

Practice exercise

Create a fresh example for Lists using a different product, screen, component, or content set. Explain what changed and why.

48.5 Reusable UI Components

Reusable UI Components is part of the Tailwind CSS 4.3 workflow. Learn what the underlying CSS property or layout rule does first, then use the utility class to apply that rule consistently in markup.

Step by step

  1. Identify the CSS behavior behind Reusable UI Components.
  2. Build a very small HTML example before placing it inside a large component.
  3. Apply the Tailwind utilities and inspect the result at multiple viewport widths.
  4. Add interaction, dark mode, RTL, or accessibility states when the component needs them.
  5. Refactor repeated markup into a reusable component only after the visual rule is understood.

10 practical examples

  1. Apply Reusable UI Components to a course website and explain the decision you made.
  2. Apply Reusable UI Components to a online store and explain the decision you made.
  3. Apply Reusable UI Components to a banking app and explain the decision you made.
  4. Apply Reusable UI Components to a school portal and explain the decision you made.
  5. Apply Reusable UI Components to a clinic booking system and explain the decision you made.
  6. Apply Reusable UI Components to a dashboard and explain the decision you made.
  7. Apply Reusable UI Components to a restaurant site and explain the decision you made.
  8. Apply Reusable UI Components to a mobile app and explain the decision you made.
  9. Apply Reusable UI Components to a creator site and explain the decision you made.
  10. Apply Reusable UI Components to a business landing page and explain the decision you made.

Hands-on example

<div class="flex flex-wrap items-center gap-4 rounded-xl border bg-white p-6 shadow-sm">
  <span class="font-semibold text-slate-900">Reusable UI Components</span>
</div>

Expected output

A working responsive example demonstrating Reusable UI Components, with no page-wide overflow and clear behavior across breakpoints.

Common mistake: Using Reusable UI Components as memorized class names without understanding the CSS behavior, responsive context, accessibility, or component structure.

Practice exercise

Create a fresh example for Reusable UI Components using a different product, screen, component, or content set. Explain what changed and why.

Chapter 48 review — 10 questions and answers

1. What is the main purpose of className?

Answer: className is part of the Tailwind CSS 4.3 workflow. Learn what the underlying CSS property or layout rule does first, then use the utility class to apply that rule consistently in markup.

2. What is a common mistake with className?

Answer: Using className as memorized class names without understanding the CSS behavior, responsive context, accessibility, or component structure.

3. What is the main purpose of Conditional Classes?

Answer: Conditional Classes is part of the Tailwind CSS 4.3 workflow. Learn what the underlying CSS property or layout rule does first, then use the utility class to apply that rule consistently in markup.

4. What is a common mistake with Conditional Classes?

Answer: Using Conditional Classes as memorized class names without understanding the CSS behavior, responsive context, accessibility, or component structure.

5. What is the main purpose of Component Props?

Answer: Component Props is part of the Tailwind CSS 4.3 workflow. Learn what the underlying CSS property or layout rule does first, then use the utility class to apply that rule consistently in markup.

6. What is a common mistake with Component Props?

Answer: Using Component Props as memorized class names without understanding the CSS behavior, responsive context, accessibility, or component structure.

7. What is the main purpose of Lists?

Answer: Lists is part of the Tailwind CSS 4.3 workflow. Learn what the underlying CSS property or layout rule does first, then use the utility class to apply that rule consistently in markup.

8. What is a common mistake with Lists?

Answer: Using Lists as memorized class names without understanding the CSS behavior, responsive context, accessibility, or component structure.

9. What is the main purpose of Reusable UI Components?

Answer: Reusable UI Components is part of the Tailwind CSS 4.3 workflow. Learn what the underlying CSS property or layout rule does first, then use the utility class to apply that rule consistently in markup.

10. What is a common mistake with Reusable UI Components?

Answer: Using Reusable UI Components as memorized class names without understanding the CSS behavior, responsive context, accessibility, or component structure.