bunchee

bunchee

zero config bundler for JavaScript/TypeScript/JSX library

Bunchee can help you to bundle your library into one file with zero configuration. It's built on top of rollup and babel. Let you focus on writing code and can generate multiple types of module (commonjs, esmodule) at the same time.

Installation

npm install --save-dev bunchee

Usage

Basic

Declare your main field and module field in package.json, then call bunchee cli in build scripts. If you're using typescript, types will be generated automatically based on your package.json field typings or types.

{
  "main": "dist/pkg.cjs.js",
  "module": "dist/pkg.esm.js",
  "scripts": {
    "build": "bunchee ./src/index.js"
  },
  "types": "dist/types/index.d.ts"
}

CLI

Usage: bunchee [options]

Options:
  -v, --version          output the version number
  -w, --watch            watch src files changes
  -m, --minify           compress output. false by default
  -o, --output <file>    specify output filename
  -f, --format <format>  specify bundle type. esm, cjs, umd. "esm" by default
  -h, --help             output usage information
  --no-sourcemap         disable sourcemap generation, sourcemap generation is enabled by default
  --cwd <cwd>            specify current working directory

Usage:
  $ bunchee ./src/index.js # if you set main fields in package.json
  $ bunchee ./src/index.ts -o ./dist/bundle.js # specify the dist file path

Example Scripts

cd <project-root-dir>
bunchee ./src/index.js -f cjs -o ./dist/bundle.js

bunchee ./src/index.js -f esm -o ./dist/bundle.esm.js
# if you don't specify format type, default format is ESModule
# bunchee ./src/index.js -o ./dist/bundle.esm.js

Using Typescript

This library requires at least TypeScript 3.7.