Babel Plugin: Resolve Barrel Conflicts A Babel plugin that automatically resolves conflicting star exports from barrel files by making exports explicit and renaming duplicates.

The Problem When using "barrel files" (index.js files that re-export from multiple other files), you can easily run into build errors if two or more files export a variable with the same name.

// player.js export const health = 100;

// enemy.js export const health = 50;

// store/index.js (Your Barrel File) export * from './player'; export * from './enemy';

When another file tries to import { health } from './store', the bundler (like Next.js or Webpack) doesn't know which health variable to use, and the build fails with a "conflicting star exports" error.

The Solution This Babel plugin automatically transforms your barrel files at build time to resolve these conflicts. It first expands all export * statements into explicit named exports, then intelligently renames any duplicates by prefixing them with their source filename.

Your code (before):

// store/index.js export * from './player'; export * from './enemy';

What Babel outputs (after applying this plugin):

export { health, level } from "./player"; export { health as enemyHealth, type } from "./enemy";

Now, you can import health (from player) and enemyHealth without any conflicts!

Installation npm install --save-dev @your-username/babel-plugin-resolve-barrel-conflicts

Usage In your Babel configuration file (babel.config.js or .babelrc), add the plugin to your plugins array.

// babel.config.js module.exports = { presets: [ // ... your other presets ], plugins: [ '@your-username/babel-plugin-resolve-barrel-conflicts', // ... your other plugins ], };