Wagtail 2: Adding custom context to your pages.

your_page.html

{% extends 'base.html' %}

{% block content %}
  <h2>Hello world!</h2>
  <p>{{ extra }}</p>
{% endblock content %}

yourpage.py

from wagtail.core.models import Page


class YourPage(Page):
    """Your Wagtail Page Type."""
    
    template = "templates/your_page.html"

    def get_context(self, request, *args, **kwargs):
        """Provide additional context information."""
        context = super().get_context(request)
        context['extra'] = 'Read all about it!'
        return context