I have a node.js + express app and I installed jQuery with npm.
var jquery = require('jquery');
When you are installing
npm it's because you want to use
jQuery on the server side of your application (Ex : in your
app.js file). You still need to add
jQuery to your web page like that :
If you want to use it on the client side. If you are using
Jade, add the script tag to your template.