API Reference > bentleyjs-core > Logging Logging Classes for configuring and logging diagnostic messages - see Learning about Logging Classes Name Description Logger Logger allows libraries and apps to report potentially useful information about operations, and it allows apps and users to control PerfLogger Simple performance diagnostics utility. Enumerations Name Description BentleyLoggerCategory Logger categories used by this package LogLevel Use to categorize logging messages by severity. Interfaces Name Description LoggerCategoryAndLevel Identifies a logging category and the LogLevel that should be used for it. LoggerLevelsConfig Specifies logging levels, including the default logging level and a set of categories and levels for them. Type Aliases Name Description LogFunction Last Updated: 11 June, 2024