yourlogger-browser
A customizable logger with timestamp, log levels, color-coded output, IndexedDB support for saving logs, export options, and more.
@basd/logger
@basd/logger is a versatile and robust logging module for Node.js and the browser.
anylog
A stream based logging library (yet another) that allows to configure arbitrary log levels. Any log appender can be assigned any combination of log levels. The log interface exposes all available log levels as top-level methods.