I don't understand what installing Bootstrap through npm means

Basically, I'm working on an Electron project and I want to include Bootstrap in my html page.I've seen tutorials about using npm install bootstrap@3 and then adding var bootstrap = require('bootstrap') but what does this actually do? What does requiring this variable on the server let me change? And from here, how can I add Bootstrap to the client side since I installed it on the server?

Submitted January 19, 2017 at 12:35PM by NanoVash