Incorporating images into CSS using an npm package

My npm package has the following structure:

--src
  --styles
     -image.png
     -style.scss

In the style.scss file, the image is referenced like this:

.test {
   background-image: url(./image.png);
}

The issue arises when consuming the package, as the CSS is looking for the image from the root directory instead of relative to the package itself. How can we resolve this problem?

This is how I am importing the package:

@import "mypackage/src/styles/style";

Answer №1

Dealing with the same problem, I struggled to find a sleek solution. Eventually, I ended up resolving it by manually copying the referenced files to the build directory. To accomplish this task, I utilized the "copy-webpack-plugin" plugin from here.

If you're facing a similar challenge, take a look at this related issue as well: Bundle assets from npm package with Webpack

Answer №2

Lately, I encountered this issue and discovered that the information on StackOverflow was outdated. This is not surprising considering how rapidly things evolve in the realm of NPM & Web Development.

The good news is that Webpack 5 has resolved this problem straight out of the box. All you need to do is update the webpack.config.js file.

You can find more details about this in webpack's documentation here: https://webpack.js.org/guides/asset-modules/

The solution involves Base64 encoding your static assets and inlining them into your CSS/JavaScript files.

When preparing your source code for distribution on NPM, if your CSS file references static images like this:

background-image: url(./image.png)
, you should inline your assets into your style file and then process it using the style-loader and css-loader packages.

In my case, adding the following lines to my webpack.config.js solved the issue and enabled me to export a single index.js file along with my package, which I could import into other projects:

The crucial line to pay attention to here is type: asset/inline when dealing with images.

webpack.config.js
...
...

module: {
    rules: [
        {
          test: /\.(js|jsx)$/,
          exclude: /node_modules/,
          use: ["babel-loader"],
        },
        {
          test: /\.css$/i,
          use: ["style-loader", "css-loader"],
        },
        {
          test: /\.(png|jpg|gif)$/i,
          type: "asset/inline",
        },
      ],
    },
 
...
...

Answer №3

To get started, simply install the file loader tool by running this command:

npm install file-loader --save-dev

Next, make sure to include the following line in the module section of your configuration file:

module: {
        rules: [{
                 test: /\.(png|svg|jpg|gif)$/,
                 use: ['file-loader']
               }]
        }

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