How do you write a logger in node JS?

Collect your Node. js logs

1. Create a custom logger for your application.
2. Incorporate the right levels for your logs.
3. Log to the console or to a file.
4. Add global metadata to your logs.
5. Add metadata directly to individual logs.
6. Customize the format of your logs.
7. Automatically capture uncaught exceptions in your logs.

Which logger is best for NodeJS?

Some of the most popular logging libraries for Node are Winston, Bunyan, and Log4js. If you want to store your error log in a remote location or separate database, Winston might be the best choice because it supports multiple transports. Bunyan also supports multiple transports and comes with a CLI for filtering.

What is logger NPM?

A simple multi-level logger for console, file, and rolling file appenders. Features include: levels: trace, debug, info, warn, error and fatal levels (plus all and off) add appenders to send output to console, file, rolling file, etc. change log levels on the fly.

What is logger in NodeJS?

Node. js logging is an important part of supporting the complete application life cycle. From creation to debugging to planning new features, logs support us all the way. By analyzing the data in the logs, we can glean insights, resolve bugs much quicker, and detect problems early and as they happen.

What is JS logger?

The Logger class provides logging functionality for an application. It can be used to display errors, warnings and debug messages.

How do I use Winston logger in node JS?

Add the Winston module with a require() function.

1. const winston = require(‘winston’);
2. const logConfiguration = { ‘transports’: [ new winston.
3. const logger = winston.
4. // Log a message logger.
5. {“message”:”Hello, Winston logger a warning!”,”
6. transports.

What is Javascript logger?

How do I use Winston logger in node js?

What does logger info do?

The info() method of a Logger class used to Log an INFO message. This method is used to forward logs to all the registered output Handler objects. INFO message: Info is for the use of administrators or advanced users.

What is Winston library?

winston is designed to be a simple and universal logging library with support for multiple transports. A transport is essentially a storage device for your logs. Each winston logger can have multiple transports (see: Transports) configured at different levels (see: Logging levels).

Is Winston logger async?

The Nodejitsu team has released Winston, a pluggable, async logger for Node. js that also supports multiple transports.

What is logger object in Java?

A Logger object is used to log messages for a specific system or application component. Loggers are normally named, using a hierarchical dot-separated namespace. Logger names can be arbitrary strings, but they should normally be based on the package name or class name of the logged component, such as java.net or javax.