prefer-static-method

v1.26.0

style

configurable

has auto-fix

pro+

Suggests converting an instance method to a static method if it does not reference any instance or inherited members.

⚙️ Config

Set ignore-public (default is false) to ignore public methods.

Set ignore-private (default is false) to ignore private methods.

analysis_options.yaml

dart_code_metrics:
  rules:
    - prefer-static-method:
        ignore-public: false
        ignore-private: false

note

Only one of the configuration options will apply if both are set to true.

Example

❌ Bad:

class Child extends Parent {
  const Child() : super('hello');
  
  // LINT: This method does not reference any instance members and can be made static.
  void some() {
    print('hi');
  }
}

✅ Good:

class Child extends Parent {
  const Child() : super('hello');
  
  void correct() {
    super.value;
    super.method();
    this.value;
  }

  // OR
  static void another() {
    ...
  }
}

// OR
void globalFn() {
  ...
}

Related Rules

• prefer-abstract-final-static-class
• avoid-assigning-to-static-field
• prefer-static-class