configure-bundler-build

To configure dual ESM and CJS output for a TypeScript library, you need to select a bundler like Vite or tsup and adjust its module resolution settings to generate both formats simultaneously. This ensures broad package compatibility while maintaining correct tree-shaking.

Tree-shaking breaks in your Vite build usually due to incorrect module format configurations or improper import syntax in the codebase. Optimizing the build toolchain configuration addresses these issues by enforcing strict ESM resolution and eliminating side effects.

The best way to generate TypeScript declaration files during a bundler build is to configure your chosen bundler toolchain to emit `.d.ts` files alongside the compiled JavaScript output to ensure accurate type resolution for consumers.

Yes, you can securely inject environment variables into an esbuild bundle by configuring the build toolchain to explicitly define safe variables during the compilation process. This prevents sensitive secrets from leaking into the final client bundle.

To resolve path aliases when building a Node.js CLI tool with esbuild, you must update the bundler configuration to map alias paths to their actual file system locations. This ensures correct module resolution and successful compilation.

Yes, building applications versus libraries requires different bundler configurations because each context has distinct module output, tree-shaking, and type declaration requirements. Selecting the appropriate tool like Vite or Rollup ensures optimal build performance.