SkillHub

flutter

v1.0.1

Build reliable Flutter apps avoiding state loss, widget rebuild traps, and async pitfalls.

Sourced from ClawHub, Authored by Iván

Installation

Please help me install the skill `flutter` from SkillHub official store. npx skills add ivangdavila/flutter

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