avoid_returning_null_for_void

Don't return 'null' from a function with a return type of 'void'.

Don't return 'null' from a method with a return type of 'void'.

The analyzer produces this diagnostic when a function that has a return type of void explicitly returns null.

The following code produces this diagnostic because there is an explicit return of null in a void function:

void f() {
  return null;
}

Remove the unnecessary explicit null:

void f() {
  return;
}

除非另有说明，文档之所提及适用于 Dart 3.7.3 版本，本页面最后更新时间: 2025-05-08。 查看文档源码 或者 报告页面问题。