unnecessary_this

Don't access members with this unless avoiding shadowing.

From Effective Dart:

DON'T use this when not needed to avoid shadowing.

BAD:

class Box {
  int value;
  void update(int newValue) {
    this.value = newValue;
  }
}

GOOD:

class Box {
  int value;
  void update(int newValue) {
    value = newValue;
  }
}

GOOD:

class Box {
  int value;
  void update(int value) {
    this.value = value;
  }
}

To enable the unnecessary_this rule, add unnecessary_this under linter > rules in your analysis_options.yaml file:

linter:
  rules:
    - unnecessary_this

If you're instead using the YAML map syntax to configure linter rules, add unnecessary_this: true under linter > rules:

linter:
  rules:
    unnecessary_this: true

Unless stated otherwise, the documentation on this site reflects Dart 3.7.0. Page last updated on 2025-01-27. View source or report an issue.