winstonjs/winston

Winston is a logging library for Node.js applications. Logging means recording messages and events as your software runs, errors, warnings, general information, so you can understand what happened when something goes wrong or when you need to audit activity. What makes Winston flexible is its concept of transports. A transport is a destination for your log messages. You can configure multiple transports on a single logger simultaneously, for example, writing error-level messages to a file on disk while also printing all messages to the console during development. Community-built transports exist for databases, remote services, and many other destinations. Winston also supports log levels, which let you rank messages by importance (error, warn, info, debug, etc.) and filter what gets recorded based on the current environment. Output formatting is fully configurable, you can output plain text, JSON, colorized output, or create custom formats by combining built-in formatters. You would use Winston any time you are building a Node.js application or service and need reliable, configurable logging that can route messages to different destinations depending on their severity or the deployment environment. The tech stack is JavaScript, running on Node.js.