use_named_constants

Learn about the use_named_constants linter rule.

Stable

Fix available

Released in Dart 2.13

Use predefined named constants.

Where possible, use already defined const values.

BAD:

dart

const Duration(seconds: 0);

GOOD:

dart

Duration.zero;

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

analysis_options.yaml

yaml

linter:
  rules:
    - use_named_constants

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

analysis_options.yaml

yaml

linter:
  rules:
    use_named_constants: true

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