WordPress 7.0 Iframed Editor: Migration Playbook for Meta Boxes, Plugins, and Admin JS
· 4 min read
As of February 24, 2026, WordPress 7.0 is in Beta 1 (released February 20, 2026), and the post editor is planned to run inside an iframe regardless of block apiVersion. If your plugin still depends on top-window DOM selectors, legacy block registration, or unflagged classic meta boxes, this is the migration window to fix compatibility before the planned 7.0 release on April 9, 2026.