Encountering a problem with Webpack SASS build where all files compile successfully, only to be followed by a JavaScript

Being a newcomer to webpack, I am currently using it to package an Angular 2 web application. However, I am encountering errors related to SASS compilation and the ExtractTextPlugin while working on my project.

Here is a snippet from my webpack configuration that might be relevant:

 module: {
    rules: [{
        test: /\.scss$/,
        loader: ExtractTextPlugin.extract({
            fallbackLoader: ['style-loader'],
            loader: [{
                loader: 'css-loader?sourceMap',
                options: {
                    sourceMap: true
                }
            }, {
                loader: 'sass-loader?sourceMap&output=compressed',
                options: {
                    sourceMap: true
                }
            }]
        })
    }]

    new ExtractTextPlugin({
        filename: "style.css"
    }),
}

Even though the build process is successful and the server starts without any issues, upon launching the app in the browser, I encounter the following error message:

Uncaught TypeError: cssText.replace is not a function
    at extractStyleUrls (http://localhost:3000/vendor.bundle.js:32923:35)
    at http://localhost:3000/vendor.bundle.js:19549:136

Initially, my struggle was getting sourcemaps to work correctly, which required tweaking package versions. The main reason for needing this was to utilize resolve-url-loader for relative file imports, which could potentially be causing this issue. While inspecting the stack trace, I noticed the following comment above the problematic code:

/**
 * Rewrites stylesheets by resolving and removing the @import urls that
 * are either relative or don't have a `package:` scheme
 */

Upon attempting to add url-loader to address this problem, I encountered a different error:

Module build failed: ReferenceError: document is not defined

At the moment, I am unsure of how to proceed. Has anyone faced similar challenges before? Any additional insights or information would be greatly appreciated.

Answer №1

After some investigation, I managed to find the solution to my own query.

While experimenting with Angular's latest method for importing stylesheets using the @Component decorator, I discovered that a small script named style_url_loader.js was causing an error. This script is actually a key component of Angular 2. Although I cannot explain why the error occurred, I personally believe that their approach is not necessary. As long as you properly scope your CSS, there is no benefit and even some drawbacks.

With that realization, I made the decision to switch to require imports instead. For example,

const style = require('./app.component.scss')
, which promptly resolved the issue I was facing.

I hope this information proves useful to someone in a similar situation!

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