rules.md

Lint set contents

Core lint rules

Lint Rules	Description	Fix
avoid_empty_else	Avoid empty statements in else clauses.	✅
avoid_relative_lib_imports	Avoid relative imports for files in lib/.	✅
avoid_shadowing_type_parameters	Avoid shadowing type parameters.
avoid_types_as_parameter_names	Avoid types as parameter names.	✅
await_only_futures	Await only futures.	✅
camel_case_extensions	Name extensions using UpperCamelCase.
camel_case_types	Name types using UpperCamelCase.
collection_methods_unrelated_type	Invocation of various collection methods with arguments of unrelated types.
curly_braces_in_flow_control_structures	DO use curly braces for all flow control structures.	✅
dangling_library_doc_comments	Attach library doc comments to library directives.	✅
depend_on_referenced_packages	Depend on referenced packages.
empty_catches	Avoid empty catch blocks.	✅
file_names	Name source files using lowercase_with_underscores.
hash_and_equals	Always override hashCode if overriding ==.	✅
implicit_call_tearoffs	Explicitly tear-off call methods when using an object as a Function.	✅
library_annotations	Attach library annotations to library directives.	✅
no_duplicate_case_values	Don't use more than one case with same value.	✅
no_wildcard_variable_uses	Don't use wildcard parameters or variables.
non_constant_identifier_names	Name non-constant identifiers using lowerCamelCase.	✅
null_check_on_nullable_type_parameter	Don't use null check on a potentially nullable type parameter.	✅
prefer_generic_function_type_aliases	Prefer generic function type aliases.	✅
prefer_is_empty	Use isEmpty for Iterables and Maps.	✅
prefer_is_not_empty	Use isNotEmpty for Iterables and Maps.	✅
prefer_iterable_whereType	Prefer to use whereType on iterable.	✅
prefer_typing_uninitialized_variables	Prefer typing uninitialized variables and fields.	✅
provide_deprecation_message	Provide a deprecation message, via @Deprecated("message").
secure_pubspec_urls	Use secure urls in pubspec.yaml.
type_literal_in_constant_pattern	Don't use constant patterns with type literals.	✅
unnecessary_overrides	Don't override a method to do a super method invocation with the same parameters.	✅
unrelated_type_equality_checks	Equality operator == invocation with references of unrelated types.
use_string_in_part_of_directives	Use string in part of directives.	✅
valid_regexps	Use valid regular expression syntax.
void_checks	Don't assign to void.

Recommended lint rules

Lint Rules	Description	Fix
annotate_overrides	Annotate overridden members.	✅
avoid_function_literals_in_foreach_calls	Avoid using forEach with a function literal.	✅
avoid_init_to_null	Don't explicitly initialize variables to null.	✅
avoid_renaming_method_parameters	Don't rename parameters of overridden methods.	✅
avoid_return_types_on_setters	Avoid return types on setters.	✅
avoid_returning_null_for_void	Avoid returning null for void.	✅
avoid_single_cascade_in_expression_statements	Avoid single cascade in expression statements.	✅
constant_identifier_names	Prefer using lowerCamelCase for constant names.	✅
control_flow_in_finally	Avoid control flow in finally blocks.
empty_constructor_bodies	Use ; instead of {} for empty constructor bodies.	✅
empty_statements	Avoid empty statements.	✅
exhaustive_cases	Define case clauses for all constants in enum-like classes.	✅
implementation_imports	Don't import implementation files from another package.
invalid_runtime_check_with_js_interop_types	Avoid runtime type tests with JS interop types where the result may not be platform-consistent.
library_prefixes	Use lowercase_with_underscores when specifying a library prefix.
library_private_types_in_public_api	Avoid using private types in public APIs.
no_leading_underscores_for_library_prefixes	Avoid leading underscores for library prefixes.	✅
no_leading_underscores_for_local_identifiers	Avoid leading underscores for local identifiers.	✅
null_closures	Do not pass null as an argument where a closure is expected.	✅
overridden_fields	Don't override fields.
package_names	Use lowercase_with_underscores for package names.
prefer_adjacent_string_concatenation	Use adjacent strings to concatenate string literals.	✅
prefer_collection_literals	Use collection literals when possible.	✅
prefer_conditional_assignment	Prefer using ??= over testing for null.	✅
prefer_contains	Use contains for List and String instances.	✅
prefer_final_fields	Private field could be final.	✅
prefer_for_elements_to_map_fromIterable	Prefer for elements when building maps from iterables.	✅
prefer_function_declarations_over_variables	Use a function declaration to bind a function to a name.	✅
prefer_if_null_operators	Prefer using ?? operators.	✅
prefer_initializing_formals	Use initializing formals when possible.	✅
prefer_inlined_adds	Inline list item declarations where possible.	✅
prefer_interpolation_to_compose_strings	Use interpolation to compose strings and values.	✅
prefer_is_not_operator	Prefer is! operator.	✅
prefer_null_aware_operators	Prefer using null-aware operators.	✅
prefer_spread_collections	Use spread collections when possible.	✅
recursive_getters	Property getter recursively returns itself.
slash_for_doc_comments	Prefer using /// for doc comments.	✅
type_init_formals	Don't type annotate initializing formals.	✅
unnecessary_brace_in_string_interps	Avoid using braces in interpolation when not needed.	✅
unnecessary_const	Avoid const keyword.	✅
unnecessary_constructor_name	Unnecessary .new constructor name.	✅
unnecessary_getters_setters	Avoid wrapping fields in getters and setters just to be "safe".	✅
unnecessary_late	Don't specify the late modifier when it is not needed.	✅
unnecessary_library_name	Don't have a library name in a library declaration.	✅
unnecessary_new	Unnecessary new keyword.	✅
unnecessary_null_aware_assignments	Avoid null in null-aware assignment.	✅
unnecessary_null_in_if_null_operators	Avoid using null in ?? operators.	✅
unnecessary_nullable_for_final_variable_declarations	Use a non-nullable type for a final variable initialized with a non-nullable value.	✅
unnecessary_string_escapes	Remove unnecessary backslashes in strings.	✅
unnecessary_string_interpolations	Unnecessary string interpolation.	✅
unnecessary_this	Don't access members with this unless avoiding shadowing.	✅
unnecessary_to_list_in_spreads	Unnecessary toList() in spreads.	✅
use_function_type_syntax_for_parameters	Use generic function type syntax for parameters.	✅
use_rethrow_when_possible	Use rethrow to rethrow a caught exception.	✅
use_super_parameters	Use super-initializer parameters where possible.	✅