Integrating Tailwind CSS into a React Application

KMS Tech

January 10, 2026

4 min read

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Tailwind CSS is a low-level CSS framework that’s highly customizable. Unlike other frameworks or UI kits that provide pre-designed components (buttons, cards, modals, etc.) to help you get started quickly but can be cumbersome to customize later, Tailwind focuses on low-level utility classes (utility-first), allowing you to build your own design without worrying about overriding existing styles.

In this post, I’ll guide you on how to integrate Tailwind CSS into a React app

Create a React App

The simplest way to create a React app is by using the create-react-app script with npx

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npx create-react-app my-app && cd my-app

Using npx lets you run the create-react-app script without needing to install the package.

Adding dependencies

Install the following devDependencies to set up Tailwind CSS

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yarn add tailwindcss postcss-cli autoprefixer -D
## or npm install tailwindcss postcss-cli autoprefixer --save-dev

Besides Tailwind CSS, we’ll also install:

PostCSS: A tool for analyzing and transforming styling using JS plugins, which helps with CSS suggestions, supporting variables and mixins, compiling new CSS features, etc.
Autoprefixer: A PostCSS plugin that automatically adds vendor prefix (-webkit-, -moz-, -ms-, -o-, etc.) based on data from Can I Use to ensure your CSS works on multiple browsers.

Configuring PostCSS

PostCSS helps manage and configure your CSS build process.

Create a config file:

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touch postcss.config.js

Add the following config:

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module.exports = {
  plugins: [require('tailwindcss'), require('autoprefixer')],
}

This build process uses two plugins: tailwindcss and autoprefixer.

Injecting Tailwind CSS

Create a sub-folder named styles inside the src folder. In the styles folder, create a file called tailwind.css.

Or use the command line:

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mkdir src/styles && touch src/styles/tailwind.css

Import the following modules from Tailwind CSS:

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@tailwind base;

@tailwind components;

@tailwind utilities;

You can place the tailwind.css file in any folder you like, such as src/static, src/assets, src/styles ...

Adding build script

Open the package.json file and add the following build script (inside the scripts object):

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"build:css": "postcss src/styles/tailwind.css -o src/styles/main.css"

This script uses PostCSS CLI to build the CSS based on the config in the tailwind.css file, with the output (flag -o) as main.css.

You can choose the file name and location as you like. Here, I’m putting both the input config file and output in the same folder: src/styles.

Now you can manually trigger the build with the command:

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yarn build:css
# or npm run build:css

After configuring and building, your project structure should look like this:

Project structure

To make things easier, you can integrate the build:css command into the start and build scripts of your project, ensuring that your CSS is always rebuilt with the latest updates each time you start the project:

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"scripts": {
	"start": "npm run build:css && react-scripts start",
	"build": "npm run build:css && react-scripts build",
	"test": "react-scripts test",
	"eject": "react-scripts eject",
	"build:css": "postcss src/styles/tailwind.css -o src/styles/main.css"
}
// more configs...

Now to build the CSS and start the project, you just need to run yarn start.

Using Tailwind CSS in a React component

Import the built CSS into the start file of your project (mine is index.js):

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import './styles/main.css'

Create a basic component:

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import React from 'react'

function App() {
  return (
    <div className="flex justify-center pt-8">
      <div className="w-full max-w-sm shadow-lg lg:flex lg:max-w-full">
        <div
          className="h-48 flex-none overflow-hidden rounded-t bg-cover text-center lg:h-auto lg:w-48 lg:rounded-l lg:rounded-t-none"
          style={{
            backgroundImage: `url('https://image-us.24h.com.vn/upload/1-2020/images/2020-02-06/kodfd-1580928361-474-width640height480.jpg')`,
          }}
          title="Woman holding a mug"
        ></div>
        <div className="flex flex-col justify-between rounded-b border-b border-l border-r border-gray-400 bg-white p-4 leading-normal lg:rounded-b-none lg:rounded-r lg:border-l-0 lg:border-t lg:border-gray-400">
          <div className="mb-8">
            <p className="flex items-center text-sm text-gray-600">Latest News</p>
            <div className="mb-2 text-xl font-bold text-gray-900">
              Messi is moving to Manchester City
            </div>
            <p className="text-base text-gray-700">
              Lorem ipsum dolor sit amet, consectetur adipisicing elit. Voluptatibus quia, nulla!
              Maiores et perferendis eaque, exercitationem praesentium nihil.
            </p>
          </div>
          <div className="flex items-center">
            <img
              className="mr-4 h-10 w-10 rounded-full"
              src="https://encrypted-tbn0.gstatic.com/images?q=tbn%3AANd9GcRG2WOlZ4KLuNN1ksjNOmh6oZ091IUhJiZD7w&usqp=CAU"
              alt="Avatar of Jonathan Reinink"
            />
            <div className="text-sm">
              <p className="leading-none text-gray-900">Jonathan Reinink</p>
              <p className="text-gray-600">Aug 18</p>
            </div>
          </div>
        </div>
      </div>
    </div>
  )
}

export default App

Here’s the result

Tailwind css result

Conclusion

I hope you can integrate and use Tailwind CSS in your project through this tutorial. Personally, I find this framework quite simple, easy to use, and of good quality.

Leave your comments below if you have any feedback

References

#integration#PostCSS#React#Tailwind CSS