Jade - pass variable to base layout from extending template

jade_helper.md

layout.jade

doctype 5
html.no-js(lang='en')
block vars
head
  title #{title}
  meta(name='description', content='#{description}')
body
  block content

page.jade

extends layout

block vars
  - var title='Home'
  - var description = 'Welcome to my page'

block content
  p Hello world!

This solution came from Jade issue discussion.

Thanks for this! This is way more popular https://stackoverflow.com/questions/29089925/pass-variables-to-base-layout-from-extending-pug-jade-template, but yours is more descriptive w/ an example of how to do it.