Debugging webpack build errors involves checking configuration files, inspecting module errors, and ensuring dependencies are compatible. Using webpack’s verbose output can offer clues.

Webpack build errors are often due to misconfigurations, outdated dependencies, or incompatibility between plugins and loaders. To debug these, start by reviewing your webpack.config.js file to ensure all paths, loaders, and plugins are correctly specified. Often, small typos or syntax errors can lead to build failures. Use webpack’s verbose output by enabling stats: 'detailed' in your configuration, which provides comprehensive information on modules, dependencies, and errors. If you encounter module errors, check if all dependencies are correctly installed and up-to-date, as version conflicts between plugins or loaders can also lead to build failures. Updating dependencies or switching to compatible versions can often resolve these issues. Additionally, using source maps can help identify the exact location of errors in your code, which is especially useful when debugging minified production builds. Tools like webpack-bundle-analyzer can also help identify oversized modules, which can cause issues if certain optimizations like tree-shaking aren’t applied. By systematically reviewing the configuration, checking compatibility, and utilizing debugging tools, you can resolve most webpack build errors efficiently.