Minimal JavaScript/TypeScript bundler with plugin architecture.

npm install @oxog/bundler

import { bundle } from "@oxog/bundler";

await bundle({
  entry: "src/index.ts",
  outDir: "dist",
  format: ["esm", "cjs"],
  treeshake: true,
});

npx @oxog/bundler src/index.ts --out dist --format esm,cjs

• Zero Runtime Dependencies - Core functionality implemented from scratch
• Plugin Architecture - Extensible micro-kernel design
• ESM & CJS & IIFE Support - Multiple output formats
• Tree Shaking - Dead code elimination
• Circular Dependency Detection - Identifies and handles module cycles
• External Dependency Support - Exclude external packages from bundle
• Dynamic Import Support - Parse and handle import() expressions
• Side Effect Detection - Analyze code for side effects
• AST-Based Parsing - Uses Acorn for accurate import/export detection
• Fast Build Performance - Efficient module resolution and graph traversal
• Watch Mode - Incremental rebuilds
• Path Aliases - Custom module resolution paths
• Multiple Entry Points - Bundle multiple files

• Code Splitting - Automatic and manual chunking (partial)
• TypeScript - Built-in type stripping and transpilation
• CSS Bundling - Native CSS processing and extraction
• Source Maps - Source map generation
• Minification - Code optimization with terser

Create a bundler.config.ts file:

import { defineConfig } from "@oxog/bundler";

export default defineConfig({
  entry: "src/index.ts",
  outDir: "dist",
  format: ["esm", "cjs"],
  treeshake: true,
  external: ["lodash"],
  alias: {
    "@": "./src",
  },
});

• Specification
• Implementation Details
• Task List

MIT © 2026 Ersin Koc

• GitHub: https://github.com/ersinkoc/bundler
• Documentation: https://bundler.oxog.dev