What's the `composer require` equivalent for npm?

Question

What's the `composer require` equivalent for npm?

I am pretty familiar with composer and now looking into npm, the command below doesn't seen to change the package.json file like composer require slim/slim 2.4.3

npm install express

Is changing the json manually necessary?

node.js
express
npm
composer-php

Answer 1

you should add the --save option :

npm install express --save