emit-changed-only-webpack-plugin

Webpack production plugin that prevents identical output files from being re-emitted after a rebuild, preserving cache headers (ETag, Last-Modified) for unchanged assets. Current stable version 2.1.4 requires webpack ^4.0.0. Key differentiator: focuses on file emission behavior rather than chunk-level comparison, using [contenthash] to detect changes. Helps improve browser caching and V8 code caching by avoiding unnecessary file modifications. Ships TypeScript types.