avoid-shrink-wrap-in-lists

added in: 1.6.0

performance

Warns when a ListView widget with shrinkWrap parameter is wrapped in a Column, Row or another ListView widget.

According to the Flutter documentation, using shrinkWrap in lists is expensive performance-wise and should be avoided, since using slivers is significantly cheaper and achieves the same or even better results.

Additional resources:

• https://github.com/dart-lang/linter/issues/3496

Example

❌ Bad:

Column(
  children: [
    Expanded(
      // LINT
      child: ListView(
        shrinkWrap: true,
        physics: const NeverScrollableScrollPhysics(),
        children: [],
      ),
    ),
  ],
),

✅ Good:

CustomScrollView(
  slivers: [
    SliverList(
      delegate: SliverChildBuilderDelegate(
        (context, index) => Container(),
        childCount: someObject.length,
      ),
    ),
  ],
),