How to import a CSS file in a React Component

I want to import a CSS file into a react component.

I've tried import disabledLink from "../../../public/styles/disabledLink"; but I get the error below;

Module not found: Error: Cannot resolve 'file' or 'directory' ../../../public/styles/disabledLink in c:\Users\User\Documents\pizza-app\client\src\components @ ./client/src/components/ShoppingCartLink.js 19:20-66 Hash: 2d281bb98fe0a961f7c4 Version: webpack 1.13.2

C:\Users\User\Documents\pizza-app\client\public\styles\disabledLink.css is the location of the CSS file I'm trying to load.

To me it seems like import is not looking up the correct path.

I thought with ../../../ it would start to look up the path three folder layers above.

C:\Users\User\Documents\pizza-app\client\src\components\ShoppingCartLink.js is the location of the file that should import the CSS file.

What am I doing wrong and how can I fix it?

4

12 Answers

You don't even have to name it if you don't need to:

e.g.

import React from 'react'; import './App.css'; 

see a complete example here (Build a JSX Live Compiler as a React Component).

2

You need to use css-loader when creating bundle with webpack.

Install it:

npm install css-loader --save-dev 

And add it to loaders in your webpack configs:

module.exports = { module: { loaders: [ { test: /\.css$/, loader: "style-loader!css-loader" }, // ... ] } }; 

After this, you will be able to include css files in js.

6

I would suggest using CSS Modules:

React

import React from 'react'; import styles from './table.css'; export default class Table extends React.Component { render () { return <div className={styles.table}> <div className={styles.row}> <div className={styles.cell}>A0</div> <div className={styles.cell}>B0</div> </div> </div>; } } 

Rendering the Component:

<div> <div> <div>A0</div> <div>B0</div> </div> </div> 
4

The following imports an external CSS file in a React component and outputs the CSS rules in the <head /> of the website.

  1. Install Style Loader and CSS Loader:
npm install --save-dev style-loader npm install --save-dev css-loader
  1. In webpack.config.js:
module.exports = { module: { rules: [ { test: /\.css$/, use: [ 'style-loader', 'css-loader' ] } ] } } 
  1. In a component file:
import './path/to/file.css';
3

CSS Modules let you use the same CSS class name in different files without worrying about naming clashes.

Button.module.css

.error { background-color: red; } 

another-stylesheet.css

.error { color: red; } 

Button.js

import React, { Component } from 'react'; import styles from './Button.module.css'; // Import css modules stylesheet as styles import './another-stylesheet.css'; // Import regular stylesheet class Button extends Component { render() { // reference as a js object return <button className={styles.error}>Error Button</button>; } } 
3

The solutions above are completely changed and deprecated. If you want to use CSS modules (assuming you imported css-loaders) and I have been trying to find an answer for this for such a long time and finally did. The default webpack loader is quite different in the new version.

In your webpack, you need to find a part starting with cssRegex and replace it with this;

{ test: cssRegex, exclude: cssModuleRegex, use: getStyleLoaders({ importLoaders: 1, modules: true, localIdentName: '[name]__[local]__[hash:base64:5]' }), } 
1

You can also use the required module.

require('./componentName.css'); const React = require('react'); 
  1. Install Style Loader and CSS Loader:

    npm install --save-dev style-loader npm install --save-dev css-loader 
  2. Configure webpack

    module: { loaders: [ { test: /\.css$/, loader: 'style-loader' }, { test: /\.css$/, loader: 'css-loader', query: { modules: true, localIdentName: '[name]__[local]___[hash:base64:5]' } } ] } 

You can import css file if css file reside in a same folder where you want to import than just simple try this

import './styles.css'

if css file is far away from our component that navigate that place where file is reside and use this like

import '../mainstyles/styles.css'

1

In cases where you just want to inject some styles from a stylesheet into a component without bundling in the whole stylesheet I recommend . For example:

const btnStyle = styledImport.react('../App.css', '.button') // btnStyle is now { color: 'blue' } or whatever other rules you have in `.button`. 

NOTE: I am the author of this lib, and I built it for cases where mass imports of styles and CSS modules are not the best or most viable solution.

Using extract-css-chunks-webpack-plugin and css-loader loader work for me, see below:

webpack.config.js Import extract-css-chunks-webpack-plugin

const ExtractCssChunks = require('extract-css-chunks-webpack-plugin'); 

webpack.config.js Add the css rule, Extract css Chunks first then the css loader css-loader will embed them into the html document, ensure css-loader and extract-css-chunks-webpack-plugin are in the package.json dev dependencies

rules: [ { test: /\.css$/, use: [ { loader: ExtractCssChunks.loader, }, 'css-loader', ], } ] 

webpack.config.js Make instance of the plugin

plugins: [ new ExtractCssChunks({ // Options similar to the same options in webpackOptions.output // both options are optional filename: '[name].css', chunkFilename: '[id].css' }) ] 

And now importing css is possible And now in a tsx file like index.tsx i can use import like this import './Tree.css' where Tree.css contains css rules like

body { background: red; } 

My app is using typescript and this works for me, check my repo for the source :

You can import your .css file in .jsx file

Here is an example -

import Content from '../content/content.jsx'; 

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