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avoid-empty-spread

added in: 1.15.0
warning
🛠
Pro+
preset: recommended

Warns when a collection literal in spread (...[]) has no elements.

Example​

❌ Bad:

void fn(bool flag) {
  final another = [
    ...<String>[], // LINT: This spread has no elements. Try adding elements or removing it.
    if (flag) ...<String>[], // LINT: This spread has no elements. Try adding elements or removing it.
  ];
}

✅ Good:

void fn(bool flag) {
  final another = [
    ...<String>['some', 'elements'], // Correct, no empty spread
  ];
}

Additional Resources​