In the latest version of Jade, partial is deprecated.

Code using partial won’t render

extends layout

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

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 You might be following outdated tutorials.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

Since you can’t use partial, let’s use mixin instead.

---

Reference Information

・node.js - Partial Not Defined in Jade - Stack Overflow

That’s all from the Gemba.