Name: Flutter
Author: ivangdavila

Quick Reference

| Topic | File |

|-------|------|

| setState, state loss, keys | state.md |

| build method, context, GlobalKey | widgets.md |

| FutureBuilder, dispose, mounted | async.md |

| Context after pop, deep linking | navigation.md |

| const, rebuilds, performance | performance.md |

| Platform channels, null safety | platform.md |

Critical Rules

setState after dispose — check mounted before calling, crashes otherwise
Key missing on list items — reordering breaks state, always use keys
FutureBuilder rebuilds on parent rebuild — triggers future again, cache the Future
BuildContext after async gap — context may be invalid, check mounted first
const constructor — prevents rebuilds, use for static widgets
StatefulWidget recreated — key change or parent rebuild creates new state
GlobalKey expensive — don't use just to access state, pass callbacks instead
dispose incomplete — cancel timers, subscriptions, controllers
Navigator.pop with result — returns Future, don't ignore errors
ScrollController not disposed — memory leak
Image caching — use cached_network_image, default doesn't persist
PlatformException not caught — platform channel calls can throw