Overview

Wagtail 3.0, released on May 16, 2022, is a major release with a modernized admin interface and a StreamField overhaul.

Main Features

Modernized admin UI

The admin interface features a new design with an improved sidebar, dark theme, and redesigned navigation.

python 
# settings.py - Wagtail 3.0 admin customization
WAGTAIL_SITE_NAME = 'My site'
WAGTAILADMIN_BASE_URL = 'https://mysite.com'

# New design is enabled by default
# Dark theme available via user preferences

New StreamField

StreamField now uses a native JSON field instead of serialized format, improving performance and maintainability.

python 
from wagtail.models import Page
from wagtail.fields import StreamField
from wagtail import blocks

class ArticlePage(Page):
    # use_json_field=True is required in 3.0
    body = StreamField([
        ('text', blocks.RichTextBlock()),
        ('quote', blocks.BlockQuoteBlock()),
    ], use_json_field=True)

Sources