npm install from one package.json and append it othe code example
Example 1: install node modules
npm install --save packageName
npm install --save package1 package2
npm install --save package@version
npm i -s packageName
npm install --save-dev package@version
npm i -D packageName
npm install --global packageName
npm i -g packageName
Example 2: what is package.json in node
All npm packages contain a file, usually in the project root, called package. json - this file holds various metadata relevant to the project. This file is used to give information to npm that allows it to identify the project as well as handle the project's dependencies.