Guide · Open source
How to use commander.js: a beginner's guide for Node.js CLIs
Updated · written with AI from the project's own documentation and checked against our catalogue data
Commander.js is a JavaScript library for Node.js that helps developers build command-line programs. It handles parsing of options and subcommands, so you do not have to write that logic by hand. This guide explains what the project is, what you need before starting, how to get the source, and how to decide whether it fits your script or tool.
Commander.jstj/commander.js · ★ 28.4k · MIT Install options & downloads Quick start
- 1Confirm Node.js is installed. Commander.js runs inside Node.js, so Node.js is the only listed prerequisite you need before you begin.
- 2Get the source. Run git clone https://github.com/tj/commander.js in a terminal to download the repository.
- 3Read the repository documentation. The README was empty for this page, so open the project's repository to find current usage instructions.
- 4Install through a package manager. The install method for this project is listed as a package manager. Follow the instructions in the project's repository for the exact command.
- 5Build your command-line program. Use the library inside your Node.js code to define options and subcommands for your tool.
- 6Test your tool from the terminal. Run your program from the command line to check that flags and subcommands behave as you intended.
What is commander.js?
Commander.js is a code library, not a ready-made application. You use it inside a Node.js program to build a command-line interface (CLI), meaning a tool you run from a terminal with options and arguments.
According to the project description, its job is to parse options and subcommands so the program author does not have to write that parsing logic manually. The project is released under the MIT licence.
- Language: JavaScript
- Runtime: Node.js
- Licence: MIT
- Purpose: build command-line programs with standard parsing of flags and subcommands
What you need before you start
The only prerequisite listed for this project is Node.js. If you do not write JavaScript or Node.js, commander.js is not the right kind of tool for you, because it is a library that runs inside Node.js code.
The project's install method is listed as a package manager. The README supplied for this page was empty, so this guide does not give you exact package-manager commands.
- Node.js installed on your machine
- Basic familiarity with JavaScript
- Comfort running commands in a terminal
Get the commander.js source code
The only command available in the source for this page clones the repository from GitHub. Running it downloads the project files to a folder on your computer so you can read them and see how the library is organised.
Check the project's repository for the current installation and usage instructions, since the README was not included in the material used here.
git clone https://github.com/tj/commander.jsDecide whether commander.js fits your project
Commander.js is aimed at Node.js developers writing a command-line tool, developers who want standard parsing of flags and subcommands, and teams building internal scripts that take arguments.
If your project needs a non-Node language, the description given for this project mentions only Node.js, so look at other tools for that stack.
- Good fit: Node.js CLI tools with flags and subcommands
- Good fit: internal team scripts that take arguments
- Poor fit: non-JavaScript projects
- Poor fit: people looking for a finished tool with no coding
Compare commander.js with similar projects
The comparable projects named for this item are yargs, oclif, and commander-like libraries such as cac. All of them help with building command-line programs in the Node.js ecosystem.
This page does not benchmark them or rank them, because no such data was provided. Read each project's own documentation and compare them against the features you need.
- yargs
- oclif
- cac and other commander-like libraries
Limits of this guide
The README for this project was empty when this page was prepared, so details beyond the project description are limited. This page does not cover the library's API, code examples, or configuration options because those were not in the source.
For usage details, consult the project's repository directly.
What people use it for
- Building a Node.js command-line tool with flags and subcommands
- Writing internal team scripts that take arguments
- Creating a CLI wrapper around a Node.js project
Frequently asked questions
Is commander.js free to use?
Yes, the project is listed under the MIT licence. Check the LICENSE file in the repository for the full terms.
What do I need to use commander.js?
The listed prerequisite is Node.js. You also need some JavaScript knowledge, since commander.js is a library you call from your own code.
How do I install commander.js?
The project's install method is listed as a package manager. The README was empty for this page, so check the repository for the exact command.
Can I use commander.js without writing JavaScript?
No. It is a code library for Node.js, so it is not suited to people who do not write JavaScript or Node.js.
What is the difference between commander.js and yargs?
Both help build command-line programs in Node.js. This page does not compare them in detail because no benchmark or feature comparison was provided, so review each project's documentation.
Can commander.js be used for non-Node languages?
The project description mentions only Node.js. If you need a different language, look for a tool built for that language.
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Our verdict
Commander.js suits Node.js developers who want standard parsing of flags and subcommands for a command-line tool or internal script. It is a poor choice if you do not write JavaScript or need a ready-made application, and you should check the repository for full documentation before committing to it.
Install options & downloads