library_ names
The library name '{0}' isn't a lower_case_with_underscores identifier.
Description
#The analyzer produces this diagnostic when the name of a library doesn't use the lower_case_with_underscores naming convention.
Example
#
The following code produces this diagnostic because the library name
libraryName
isn't a lower_case_with_underscores identifier:
library libraryName;
Common fixes
#If the library name is not required, then remove the library name:
library;
If the library name is required, then convert it to use the lower_case_with_underscores naming convention:
library library_name;
Unless stated otherwise, the documentation on this site reflects Dart 3.9.2. Page last updated on 2025-9-1. View source or report an issue.