Simple CLI for compiling a Node.js module into a single file, together with all its dependencies, gcc-style.

• Publish minimal packages to npm
• Only ship relevant app code to serverless environments
• Don't waste time configuring bundlers
• Generally faster bootup time and less I/O overhead
• Compiled language-like experience (e.g.: go)

• Zero configuration
• TypeScript built-in
• Only supports Node.js programs as input / output
• Support all Node.js patterns and npm modules

npm i -g @zeit/ncc

$ ncc build input.js -o dist

For fast rebuilds the watcher can be run with:

$ ncc build input.js -o dist -w

Outputs the build of input.js into dist/index.js.

$ ncc run input.js

Build to a temporary folder and run the built JS file through Node.js, with source maps support for debugging.

The only requirement is to point ncc to .ts or .tsx files. A tsconfig.json file is necessary. Most likely you want to indicate es2015 support:

{
  "compilerOptions": {
    "target": "es2015",
    "moduleResolution": "node"
  }
}

require('@zeit/ncc')('/path/to/input', {
  // provide a custom cache path or disable caching
  cache: "./custom/cache/path" | false,
  // externals to leave as requires of the build
  externals: ["externalpackage"],
  minify: false, // default
  sourceMap: false, // default
  watch: false // default
}).then(({ code, map, assets }) => {
  console.log(code);
  // assets is an object of asset file names to sources
  // expected relative to the output code (if any)
})

When watch: true is set, the build object is not a promise, but has the following signature:

{
  // handler re-run on each build completion
  // watch errors are reported on "err"
  handler (({ err, code, map, assets }) => { ... })
  // handler re-run on each rebuild start
  rebuild (() => {})
  // close the watcher
  void close ();
}

• Files / assets are relocated based on a static evaluator. Dynamic non-statically analyzable asset loads may not work out correctly