create-react-app & Tailwind CSS

December 2017

3 minutes

When Tailwind CSS dropped I was eager to have a play as I loved the look of the syntax. The perfect opportunity arose while over the holidays when I thought my personal site could use a revamp.

I used the fantastic create-react-app (CRA) to start a new React project and skip lots of tedious and confusing boilerplate:

create-react-app myproject
cd myproject

CRA is set up for using vanilla CSS out of the box and although there is an official guide on using the Sass preprocessor, I wanted to switch to use PostCSS as Tailwind exports directives for this.

After some Googling, I found that most people wanting to use PostCSS with CRA were having to “eject” CRA in order to edit the underlying Webpack configuration, which deals with all the necessary loaders for different filetypes (such as CSS).

Ejecting seemed a bit of a drastic measure given that I had only just started this project, so after a bit of trial and error bodging together different solutions, I got it working. Here’s how!

Firstly, if you haven’t done already, you want to install the necessary Node modules in your project to achieve this:

npm install --save-dev tailwindcss autoprefixer postcss-cli

N.B: you don’t have to install autoprefixer but we use it below and the Tailwind docs advise using it with PostCSS, so who am I to argue!

Then initialise Tailwind with a new configuration file in the root of your project. I like to add the .config suffix to these files, so I know what they are for:

npx tailwind init tailwind.config.js

You’ll need to do the same for PostCSS so we can use it to transform the Tailwind directives into pure CSS — again, in the root of your project, create a file called postcss.config.js and add this code (taken straight from the Tailwind docs):

const tailwindcss = require("tailwindcss");

module.exports = {
  plugins: [tailwindcss("./tailwind.config.js"), require("autoprefixer")]

Nearly there! Now we need to set up our CSS “entry point”. You can do this wherever you like but here’s how I do it (if you change these paths, you will need to change them in the package.json scripts further down this article). Create src/styles/index.css and paste in the following:

@tailwind base;

@tailwind components;

@tailwind utilities;

/* Your custom CSS here */

Hooking it all together

Now all that is left is to edit the scripts in package.json  —  we still use the default CRA commands, but amend start and build, while adding watch:css and build:css:

  "scripts": {
    "build:css": "postcss src/styles/index.css -o src/index.css",
    "watch:css": "postcss src/styles/index.css -o src/index.css -w",
    "start": "npm run watch:css & react-scripts start",
    "build": "npm run build:css && react-scripts build",
    "test": "react-scripts test --env=jsdom",
    "eject": "react-scripts eject"

(Notice the single & on the start script  —  we’re telling bash to run the npm run watch:css command in the background, while our original react-scripts start runs as normal.)

If you now run npm run start you should see src/index.css generated, containing the Tailwind CSS reset and utility classes, and your custom CSS below. Furthermore, if you edit the src/styles/index.css this should watch for changes and reload your app. Woo!

To make use of this file, just make sure that in src/index.js you have:

import "index.css";

And you are good to go.

Next steps

As detailed in the Tailwind docs, now we have PostCSS processing set up, we can take advantage of the many PostCSS plugins available!

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