Bundle.js

Announcing TypeScript 5.3 Support

August 20, 2025 By the Engineering Team

Bundle.js now fully supports TypeScript 5.3! Leverage the latest type system improvements, performance optimizations, and developer tooling enhancements directly within your JavaScript bundling workflows.

Key Features

  • Automatic type inference for optimized runtime performance
  • Native support for TypeScript's new conditional type inference
  • Enhanced .d.ts module resolution for improved type accuracy

Example Configuration

TypeScript 5.3

// bundle.config.ts
import { defineConfig } from 'bundle.js';
import typescript from '@bundle.js/types-script';

export default defineConfig({
  plugins: [typescript({
    target: 'es2020',
    moduleResolution: 'node16',
    skipLibCheck: true
  })],
  resolve: {
    extensions: ['.ts', '.tsx', '.js', '.jsx']
  }
});

                    

Performance Improvements

Build Speed 47% faster
980ms 514ms
Memory Usage 63% reduced
1.8GB 678MB

Getting Started

Terminal

npm install typescript@5.3.0 bundle.js
npx bundle create --template typescript

                    
Previous Post

WebAssembly First-Class Support

August 26, 2025 Tooling