Source Maps
Source maps are files that map transformed or minified code (e.g., JavaScript, CSS) back to the original source code, enabling debugging in development tools. They work by providing a mapping between the generated code and the original files, including line and column numbers. This allows developers to view and debug their original source code directly in browsers or IDEs, even when the deployed code is optimized or compiled.
Developers should use source maps when working with minified, transpiled, or bundled code (e.g., from TypeScript, Babel, or Webpack) to maintain debuggability in production-like environments. They are essential for debugging complex applications where source code undergoes transformations, as they enable setting breakpoints, inspecting variables, and viewing stack traces in the original source. This improves development efficiency by allowing real-time debugging without needing to deploy unoptimized code.