# AWS Amplify Lints Lints used throughout Flutter packages and plugins. ## Lints The linter rules in this package are derived from the Dart team's [lints](https://pub.dev/packages/lints) package (for Dart packages) and [flutter_lints](https://pub.dev/packages/flutter_lints) (for Flutter apps/plugins/packages). A link to the description for each of the additional linter rules is provided below. More detail about linter rules can be found on the official linter rules [homepage](https://dart.dev/tools/linter-rules). ### Dart/Flutter Libraries ([`library.yaml`](lib/library.yaml)) Libraries will use the `package:lints` "recommended" ruleset plus the following: - [always_declare_return_types](https://dart.dev/tools/linter-rules#always_declare_return_types) - [always_use_package_imports](https://dart.dev/tools/linter-rules#always_use_package_imports) - [avoid_catches_without_on_clauses](https://dart.dev/tools/linter-rules#avoid_catches_without_on_clauses) - [avoid_classes_with_only_static_members](https://dart.dev/tools/linter-rules#avoid_classes_with_only_static_members) - [avoid_dynamic_calls](https://dart.dev/tools/linter-rules#avoid_dynamic_calls) - [avoid_equals_and_hash_code_on_mutable_classes](https://dart.dev/tools/linter-rules#avoid_equals_and_hash_code_on_mutable_classes) - [avoid_field_initializers_in_const_classes](https://dart.dev/tools/linter-rules#avoid_field_initializers_in_const_classes) - [avoid_js_rounded_ints](https://dart.dev/tools/linter-rules#avoid_js_rounded_ints) - [avoid_multiple_declarations_per_line](https://dart.dev/tools/linter-rules#avoid_multiple_declarations_per_line) - [avoid_positional_boolean_parameters](https://dart.dev/tools/linter-rules#avoid_positional_boolean_parameters) - [avoid_print](https://dart.dev/tools/linter-rules#avoid_print) - [avoid_type_to_string](https://dart.dev/tools/linter-rules#avoid_type_to_string) - [avoid_unnecessary_containers](https://dart.dev/tools/linter-rules#avoid_unnecessary_containers) - [avoid_unused_constructor_parameters](https://dart.dev/tools/linter-rules#avoid_unused_constructor_parameters) - [avoid_void_async](https://dart.dev/tools/linter-rules#avoid_void_async) - [cancel_subscriptions](https://dart.dev/tools/linter-rules#cancel_subscriptions) - [cascade_invocations](https://dart.dev/tools/linter-rules#cascade_invocations) - [close_sinks](https://dart.dev/tools/linter-rules#close_sinks) - [comment_references](https://dart.dev/tools/linter-rules#comment_references) - [conditional_uri_does_not_exist](https://dart.dev/tools/linter-rules#conditional_uri_does_not_exist) - [depend_on_referenced_packages](https://dart.dev/tools/linter-rules#depend_on_referenced_packages) - [deprecated_consistency](https://dart.dev/tools/linter-rules#deprecated_consistency) - [diagnostic_describe_all_properties](https://dart.dev/tools/linter-rules#diagnostic_describe_all_properties) - [directives_ordering](https://dart.dev/tools/linter-rules#directives_ordering) - [eol_at_end_of_file](https://dart.dev/tools/linter-rules#eol_at_end_of_file) - [flutter_style_todos](https://dart.dev/tools/linter-rules#flutter_style_todos) - [join_return_with_assignment](https://dart.dev/tools/linter-rules#join_return_with_assignment) - [lines_longer_than_80_chars](https://dart.dev/tools/linter-rules#lines_longer_than_80_chars) - [missing_whitespace_between_adjacent_strings](https://dart.dev/tools/linter-rules#missing_whitespace_between_adjacent_strings) - [no_runtimeType_toString](https://dart.dev/tools/linter-rules#no_runtimeType_toString) - [noop_primitive_operations](https://dart.dev/tools/linter-rules#noop_primitive_operations) - [omit_local_variable_types](https://dart.dev/tools/linter-rules#omit_local_variable_types) - [only_throw_errors](https://dart.dev/tools/linter-rules#only_throw_errors) - [package_api_docs](https://dart.dev/tools/linter-rules#package_api_docs) - [prefer_asserts_in_initializer_lists](https://dart.dev/tools/linter-rules#prefer_asserts_in_initializer_lists) - [prefer_asserts_with_message](https://dart.dev/tools/linter-rules#prefer_asserts_with_message) - [prefer_const_constructors](https://dart.dev/tools/linter-rules#prefer_const_constructors) - [prefer_const_constructors_in_immutables](https://dart.dev/tools/linter-rules#prefer_const_constructors_in_immutables) - [prefer_const_declarations](https://dart.dev/tools/linter-rules#prefer_const_declarations) - [prefer_const_literals_to_create_immutables](https://dart.dev/tools/linter-rules#prefer_const_literals_to_create_immutables) - [prefer_final_in_for_each](https://dart.dev/tools/linter-rules#prefer_final_in_for_each) - [prefer_final_locals](https://dart.dev/tools/linter-rules#prefer_final_locals) - [prefer_if_elements_to_conditional_expressions](https://dart.dev/tools/linter-rules#prefer_if_elements_to_conditional_expressions) - [prefer_int_literals](https://dart.dev/tools/linter-rules#prefer_int_literals) - [prefer_null_aware_method_calls](https://dart.dev/tools/linter-rules#prefer_null_aware_method_calls) - [prefer_single_quotes](https://dart.dev/tools/linter-rules#prefer_single_quotes) - [public_member_api_docs](https://dart.dev/tools/linter-rules#public_member_api_docs) - [require_trailing_commas](https://dart.dev/tools/linter-rules#require_trailing_commas) - [sized_box_for_whitespace](https://dart.dev/tools/linter-rules#sized_box_for_whitespace) - [sort_child_properties_last](https://dart.dev/tools/linter-rules#sort_child_properties_last) - [sort_constructors_first](https://dart.dev/tools/linter-rules#sort_constructors_first) - [sort_unnamed_constructors_first](https://dart.dev/tools/linter-rules#sort_unnamed_constructors_first) - [sort_pub_dependencies](https://dart.dev/tools/linter-rules#sort_pub_dependencies) - [tighten_type_of_initializing_formals](https://dart.dev/tools/linter-rules#tighten_type_of_initializing_formals) - [type_annotate_public_apis](https://dart.dev/tools/linter-rules#type_annotate_public_apis) - [unawaited_futures](https://dart.dev/tools/linter-rules#unawaited_futures) - [unnecessary_null_checks](https://dart.dev/tools/linter-rules#unnecessary_null_checks) - [use_enums](https://dart.dev/tools/linter-rules#use_enums) - [use_if_null_to_convert_nulls_to_bools](https://dart.dev/tools/linter-rules#use_if_null_to_convert_nulls_to_bools) - [use_late_for_private_fields_and_variables](https://dart.dev/tools/linter-rules#use_late_for_private_fields_and_variables) - [use_named_constants](https://dart.dev/tools/linter-rules#use_named_constants) - [use_raw_strings](https://dart.dev/tools/linter-rules#use_raw_strings) - [use_setters_to_change_properties](https://dart.dev/tools/linter-rules#use_setters_to_change_properties) - [use_string_buffers](https://dart.dev/tools/linter-rules#use_string_buffers) - [use_super_parameters](https://dart.dev/tools/linter-rules#use_super_parameters) - [use_test_throws_matchers](https://dart.dev/tools/linter-rules#use_test_throws_matchers) - [use_to_and_as_if_applicable](https://dart.dev/tools/linter-rules#use_to_and_as_if_applicable) - [unnecessary_await_in_return](https://dart.dev/tools/linter-rules#unnecessary_await_in_return) - [unnecessary_lambdas](https://dart.dev/tools/linter-rules#unnecessary_lambdas) - [use_full_hex_values_for_flutter_colors](https://dart.dev/tools/linter-rules#use_full_hex_values_for_flutter_colors) - [use_key_in_widget_constructors](https://dart.dev/tools/linter-rules#use_key_in_widget_constructors) ### Dart/Flutter Apps ([`app.yaml`](lib/app.yaml)) Dart and Flutter apps will use the `flutter_lints` package plus a subset of the linter rules above, namely: - [avoid_catches_without_on_clauses](https://dart.dev/tools/linter-rules#avoid_catches_without_on_clauses) - [avoid_catching_errors](https://dart.dev/tools/linter-rules#avoid_catching_errors) - [avoid_dynamic_calls](https://dart.dev/tools/linter-rules#avoid_dynamic_calls) - [avoid_field_initializers_in_const_classes](https://dart.dev/tools/linter-rules#avoid_field_initializers_in_const_classes) - [cancel_subscriptions](https://dart.dev/tools/linter-rules#cancel_subscriptions) - [close_sinks](https://dart.dev/tools/linter-rules#close_sinks) - [directives_ordering](https://dart.dev/tools/linter-rules#directives_ordering) - [eol_at_end_of_file](https://dart.dev/tools/linter-rules#eol_at_end_of_file) - [flutter_style_todos](https://dart.dev/tools/linter-rules#flutter_style_todos) - [omit_local_variable_types](https://dart.dev/tools/linter-rules#omit_local_variable_types) - [only_throw_errors](https://dart.dev/tools/linter-rules#only_throw_errors) - [prefer_final_in_for_each](https://dart.dev/tools/linter-rules#prefer_final_in_for_each) - [prefer_final_locals](https://dart.dev/tools/linter-rules#prefer_final_locals) - [prefer_if_elements_to_conditional_expressions](https://dart.dev/tools/linter-rules#prefer_if_elements_to_conditional_expressions) - [prefer_int_literals](https://dart.dev/tools/linter-rules#prefer_int_literals) - [prefer_null_aware_method_calls](https://dart.dev/tools/linter-rules#prefer_null_aware_method_calls) - [prefer_single_quotes](https://dart.dev/tools/linter-rules#prefer_single_quotes) - [require_trailing_commas](https://dart.dev/tools/linter-rules#require_trailing_commas) - [secure_pubspec_urls](https://dart.dev/tools/linter-rules#secure_pubspec_urls) - [sized_box_shrink_expand](https://dart.dev/tools/linter-rules#sized_box_shrink_expand) - [sort_constructors_first](https://dart.dev/tools/linter-rules#sort_constructors_first) - [sort_pub_dependencies](https://dart.dev/tools/linter-rules#sort_pub_dependencies) - [tighten_type_of_initializing_formals](https://dart.dev/tools/linter-rules#tighten_type_of_initializing_formals) - [unawaited_futures](https://dart.dev/tools/linter-rules#unawaited_futures) - [unnecessary_await_in_return](https://dart.dev/tools/linter-rules#unnecessary_await_in_return) - [unnecessary_lambdas](https://dart.dev/tools/linter-rules#unnecessary_lambdas) - [unnecessary_null_checks](https://dart.dev/tools/linter-rules#unnecessary_null_checks) - [use_colored_box](https://dart.dev/tools/linter-rules#use_colored_box) - [use_decorated_box](https://dart.dev/tools/linter-rules#use_decorated_box) - [use_enums](https://dart.dev/tools/linter-rules#use_enums) - [use_if_null_to_convert_nulls_to_bools](https://dart.dev/tools/linter-rules#use_if_null_to_convert_nulls_to_bools) - [use_late_for_private_fields_and_variables](https://dart.dev/tools/linter-rules#use_late_for_private_fields_and_variables) - [use_named_constants](https://dart.dev/tools/linter-rules#use_named_constants) - [use_raw_strings](https://dart.dev/tools/linter-rules#use_raw_strings) - [use_setters_to_change_properties](https://dart.dev/tools/linter-rules#use_setters_to_change_properties) - [use_super_parameters](https://dart.dev/tools/linter-rules#use_super_parameters) - [use_test_throws_matchers](https://dart.dev/tools/linter-rules#use_test_throws_matchers)