karma-sourcemap-loader

A Karma plugin preprocessor that loads existing JavaScript source map files (both inline and external) into the Karma test runner. Version 0.4.0 is current stable. Unlike karma-sourcemap-preprocessor, this plugin does not generate source maps but locates them from previous build steps (e.g., TypeScript, Babel, webpack). It supports remapping source paths via prefix replacement or custom callback, and modifying sourceRoot. Inline source maps using base64 are also supported. Release cadence is low, primarily maintenance updates. Key differentiator: solves source map loading when compilation happens outside Karma.