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[npm] Run and understand. Execute default script with npm command

created-2025/11/14 updated-2026/03/15

Introduction

This repository runs the npm command to run the script that is generated by default

Commands that need to be installed

  1. git
  2. npm
  3. node

Quickstart

If you have already installed the above command, run the following command to download it from the repository, then change the directory and run the npm command to run the script described in the generated package.json.

ubuntu

git clone https://github.com/trygfmi/npm_default
cd npm_default
cd workDirectory_npm_default
npm init -y
npm run test
npm install ../install_npm_default
cat ../install_npm_default/index.js
cat index.js
node index.js
Output results
> workdirectory_npm_default@1.0.0 test
> echo "Error: no test specified" && exit 1

Error: no test specified

hello npm command world

macos

MacPorts

source ~/bashrc_folder/macports_alias
git clone https://github.com/trygfmi/npm_default
cd npm_default
cd workDirectory_npm_default
npm init -y
npm run test
npm install ../install_npm_default
cat ../install_npm_default/index.js
cat index.js
node index.js
Output results
> workdirectory_npm_default@1.0.0 test
> echo "Error: no test specified" && exit 1

Error: no test specified

hello npm command world

windows

WSL2

git clone https://github.com/trygfmi/npm_default
cd npm_default
cd workDirectory_npm_default
npm init -y
npm run test
npm install ../install_npm_default
cat ../install_npm_default/index.js
cat index.js
node index.js
Output results
> workdirectory_npm_default@1.0.0 test
> echo "Error: no test specified" && exit 1

Error: no test specified

hello npm command world

MSYS2 MINGW64

git clone https://github.com/trygfmi/npm_default
cd npm_default
cd workDirectory_npm_default
npm init -y
npm run test
npm install ../install_npm_default
cat ../install_npm_default/index.js
cat index.js
node index.js
Output results
> workdirectory_npm_default@1.0.0 test
> echo "Error: no test specified" && exit 1

Error: no test specified

hello npm command world

Procedure

ubuntu

Click to open details

Advance confirmation

Enter the following command into the terminal and if command not found does not appear, it is OK.

git --version
npm --version
node --version

preinstall

If the command not found appears in the terminal, please install it using the following command.

sudo apt install git
sudo apt install npm

command

Executing the following command should output a string similar to the following

git clone https://github.com/trygfmi/npm_default
cd npm_default
cd workDirectory_npm_default
npm init -y
npm run test
npm install ../install_npm_default
cat ../install_npm_default/index.js
cat index.js
node index.js
detail
> workdirectory_npm_default@1.0.0 test
> echo "Error: no test specified" && exit 1

Error: no test specified

hello npm command world

macos

Click to open details

Advance confirmation

Enter the following command into the terminal and if command not found does not appear, it is OK.

source ~/bashrc_folder/macports_alias
git --version
npm --version
node --version

※MacOS uses the MacPorts package manager to manage commands. If you haven’t installed it yet, please see the MacPorts installation instructions at the link below.

It also allows you to set aliases for commands so that you can call them without conflicting with existing environments.

If you are using this blog for the first time, please refer to the following two articles to set up your environment.

preinstall

If the command not found appears in the terminal, install it using the following command and set an alias.

sudo port install git
echo 'alias git="/opt/local/bin/git"' >> ~/bashrc_folder/macports_alias
sudo port install npm10
echo 'alias npm="/opt/local/bin/npm"' >> ~/bashrc_folder/macports_alias
echo 'alias node="/opt/local/bin/node"' >> ~/bashrc_folder/macports_alias

COMMAND

Executing the following command should output a string similar to the following

source ~/bashrc_folder/macports_alias
git clone https://github.com/trygfmi/npm_default
cd npm_default
cd workDirectory_npm_default
npm init -y
npm run test
npm install ../install_npm_default
cat ../install_npm_default/index.js
cat index.js
node index.js
detail
> workdirectory_npm_default@1.0.0 test
> echo "Error: no test specified" && exit 1

Error: no test specified

hello npm command world

windows

Click to open details

Advance confirmation

Enter the following command into the prompt and if command not found does not appear, it’s OK.

WSL2
git --version
npm --version
node --version
MSYS2 MINGW64
git --version
npm --version
node --version

※Windows has been confirmed to work with WSL2 and MSYS2 MINGW64. Please install WSL2 if possible, and if you are unable to set it up, you can run it by installing MSYS2, but there may be some commands that can only be run in WSL2. Please refer to the following article for instructions on how to install WSL2 and MSYS2.

preinstall

If the command not found appears in the prompt, please install it using the following command.

WSL2
sudo apt install git
sudo apt install npm
MSYS2 MINGW64
pacman --sync git
pacman --sync mingw-w64-x86_64-nodejs

command

Executing the following command should output a string similar to the following

WSL2
git clone https://github.com/trygfmi/npm_default
cd npm_default
cd workDirectory_npm_default
npm init -y
npm run test
npm install ../install_npm_default
cat ../install_npm_default/index.js
cat index.js
node index.js
detail
> workdirectory_npm_default@1.0.0 test
> echo "Error: no test specified" && exit 1

Error: no test specified

hello npm command world
MSYS2 MINGW64
git clone https://github.com/trygfmi/npm_default
cd npm_default
cd workDirectory_npm_default
npm init -y
npm run test
npm install ../install_npm_default
cat ../install_npm_default/index.js
cat index.js
node index.js
detail
> workdirectory_npm_default@1.0.0 test
> echo "Error: no test specified" && exit 1

Error: no test specified

hello npm command world

Afterword

npm init -y sets all options to yes, and runs the test commands defined in the scripts key of the generated package.json.
Also, to check the behavior of index.js, which is specified in the main key of package.json, install the install_npm_default package and then run index.js.

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