Wagtail 2.17 release notes - IN DEVELOPMENT

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What's new

Here are other changes related to the redesign:

Upgrade ESLint and Stylelint configurations to latest shared Wagtail configs (Thibaud Colas)
Major updates to frontend tooling; move Node tooling from Gulp to Webpack, upgrade to Node v16 and npm v8, eslint v8, stylelint v14 and others (Thibaud Colas)
Change comment headers’ date formatting to use browser APIs instead of requiring a library (LB (Ben Johnston))
Lint with flake8-comprehensions and flake8-assertive, including adding a pre-commit hook for these (Mads Jensen, Dan Braghis)
Add black configuration and reformat code using it (Dan Braghis)
Remove UI code for legacy browser support: polyfills, IE11 workarounds, Modernizr (Thibaud Colas)
Remove redirect auto-creation recipe from documentation as this feature is now supported in Wagtail core (Andy Babic)
Remove IE11 warnings (Gianluca De Cola)
Replace content_json TextField with content JSONField in PageRevision (Sage Abdullah)
Remove replace_text management command (Sage Abdullah)
Replace data_json TextField with data JSONField in BaseLogEntry (Sage Abdullah)
Remove the legacy Hallo rich text editor as it has moved to an external package (LB (Ben Johnston))

Update django-treebeard dependency to 4.5.1 or above (Serafeim Papastefanos)
When using simple_translations ensure that the user is redirected to the page edit view when submitting for a single locale (Mitchel Cabuloy)
When previewing unsaved changes to Form pages, ensure that all added fields are correctly shown in the preview (Joshua Munn)
When Documents (e.g. PDFs) have been configured to be served inline via WAGTAILDOCS_CONTENT_TYPES & WAGTAILDOCS_INLINE_CONTENT_TYPES ensure that the filename is correctly set in the Content-Disposition header so that saving the files will use the correct filename (John-Scott Atlakson)

IE11 support was officially dropped in Wagtail 2.15, as of this release there will no longer be a warning shown to users of this browser.
Wagtail is fully compatible with Microsoft Edge, Microsoft’s replacement for Internet Explorer. You may consider using its IE mode <https://docs.microsoft.com/en-us/deployedge/edge-ie-mode>_ to keep access to IE11-only sites, while other sites and apps like Wagtail can leverage modern browser capabilities.

The content_json field in the PageRevision model has been renamed to content.
The field now internally uses JSONField instead of TextField.
If you have a large number of PageRevision objects, running the migrations might take a while.

The data_json field in the BaseLogEntry model has been renamed to data.
The field now internally uses JSONField instead of TextField.
The default empty value for the field has been changed from "" to {}.
This change also affects BaseLogEntry subclasses, i.e. PageLogEntry and ModelLogEntry.
If you have a large number of objects for these models, running the migrations might take a while.

Hallo was deprecated in Wagtail v2.0 (February 2018) and has had only a minimal level of support since then.
If you still require Hallo for your Wagtail installation, you will need to install the Wagtail Hallo editor legacy package.
We encourage all users of the Hallo editor to take steps to migrate to the new Draftail editor as this external package is unlikely to have ongoing maintenance.
window.registerHalloPlugin will no longer be created on the page editor load, unless the legacy package is installed.