Function basicLogger

Provides a simple LDLogger implementation.

This logging implementation uses a simple format that includes only the log level and the message text. Output is written to the standard error stream (console.error). You can filter by log level as described in BasicLoggerOptions.level.

To use the logger created by this function, put it into LDOptions.logger. If you do not set LDOptions.logger to anything, the SDK uses a default logger that is equivalent to ld.basicLogger({ level: 'info' }).

Example

This example shows how to use basicLogger in your SDK options to enable console logging only at warn and error levels.

  const ldOptions = {
    logger: ld.basicLogger({ level: 'warn' }),
  };

Example

This example shows how to use basicLogger in your SDK options to cause log output to go to console.log instead of console.error.

  const ldOptions = {
    logger: ld.basicLogger({ destination: console.log }),
  };