Partial Not Defined in Jade

Here is what I have in index.jade. And yes I am using express.js

extends layout

block content
  h1 Invoices:
  != partial("invoice")

This matches what I see in every single Jade/Express tutorial. But I get "Reference error: partial not defined". Any ideas why?

Use include, without quotes (This example is from the jade documentation)

users = [{ name: 'Tobi', occupation: 'Ferret' }]

each user in users
  .user
    include invoice

Where invoice is your "partial" template.

Jade newest version doesn't support partials. You might be following outdated tutorials. Please read up on jade documentation here