Sass loader编译停滞求助：Webpack2.2.0+Angular2.4.4环境

Hey there, sorry to hear you're hitting this frustrating build hang issue! Let's walk through some targeted fixes tailored to your stack (Webpack 2.2.0, sass-loader 4.4.1, Angular 2.4.4):

Common Fixes to Try #

• Verify Sass-Loader & Node-Sass Compatibility
  Sass-loader 4.x relies on a specific range of node-sass versions, and mismatches often cause silent hangs. For sass-loader 4.4.1, you'll want to ensure you're using node-sass ^3.8.0 or ^4.0.0. Run this to install a compatible version:

  npm install node-sass@4.5.3 --save-dev
  

  Double-check that node-sass is listed in your devDependencies after this.

• Debug Which Module Is Causing the Hang
  The progress percentage can be misleading—Webpack might be stuck processing a specific file. Enable verbose logging in your Webpack config to see exactly what's happening:

  // In your webpack.dev.js or equivalent config file
  module.exports = {
    // ... existing config
    stats: 'verbose', // Shows detailed build steps
    // If you have ProgressPlugin enabled, comment it out temporarily
    // plugins: [new webpack.ProgressPlugin()]
  };
  

  Run npm run serve again, and you'll see a line-by-line breakdown of which module it's processing when it hangs. This will point you directly to the problematic file (often a large SCSS file or one with circular imports).

• Check for Circular Imports in SCSS/Angular Components
  Circular references in your SCSS files (e.g., @import 'component-a' in component-b and vice versa) can cause Webpack to loop indefinitely. Audit any recently modified components or SCSS files for this issue.

• Update Compatibility-Critical Dependencies
  Your versions of awesome-typescript-loader (2.2.4) and Webpack (2.2.0) have known compatibility quirks that can cause build hangs. Try updating to a more stable pair:

  npm install awesome-typescript-loader@2.3.4 webpack@2.7.0 --save-dev
  

  These versions are tested to work well together with Angular 2.4.x.

• Clear Webpack & Node Modules Cache
  Corrupted cache can lead to unexpected build behavior. Delete the cache folder and reinstall dependencies:

  # Linux/Mac
  rm -rf node_modules/.cache
  # Windows (Command Prompt)
  rmdir /s /q node_modules\.cache
  
  npm install
  

If none of these fix the issue, sharing your full package.json devDependencies and Webpack configuration file would help narrow down the problem further!

内容的提问来源于stack exchange，提问作者Deep Kakkar