Phaser 3 → Phaser 4 Migration

Migrating from Phaser 3 to Phaser 4 is mostly straightforward. The core public API is preserved. This skill covers every breaking change and how to fix it — AND also covers RC-to-RC behavioral drift within Phaser 4 (e.g., RC6 → RC7) where APIs silently changed semantics between RC releases.

Step 1 — Update the Package

npm uninstall phaser
npm install phaser@beta

Verify installed version:

node -e "const p = require('phaser'); console.log(p.VERSION)"

Should print 4.0.0-rc.7 (or later RC).

Step 2 — Scan for Breaking Changes