Node Package Manager
- Npm is installed with node js. We need to install nodejs if we want to use npm.
- All the package information is specified under package.json
- Package.json uses JSON structure.
- It contains the name and version of the package.
- It contains CLI which is used for downloading packages.
Command:
The command “npm install packagename” will download the package from npm repo.
npm install
Below screen shot shows how to install a redis package. After installation, the details and dependencies are added to package.json.
npm install redis
Below screenshot shows outcome of the program:
Below screenshot shows content of package-lock.json. Which is created if not exist or updated after npm install packagename.
Below screenshot shows outcome of the program:
The command “npm install “ will use package,json and downloads all the packages specified in package.json
Npm install