flow-babel-webpack-plugin

Flow Babel Webpack Plugin (v1.1.1, last released in 2017) is a Webpack plugin that integrates Flow type checking into the Webpack build process using Babel to strip type annotations via transform-flow-comments. It provides real-time Flow error or warning reports in the Webpack output. Unlike alternatives like flow-webpack-plugin or babel-plugin-transform-flow-strip-types, this plugin specifically works with the transform-flow-comments approach to preserve type annotations as comments for Flow checks, while also allowing custom error formatting and warning-only mode. The package has not been updated in years and likely has compatibility issues with modern Webpack (4/5) and Babel (7+); it targets Webpack 1.x/2.x and Babel 6.