nice-logger

A logger with levels and a nice format.

Example

var Logger = require("nice-logger");

var log = new Logger("main", "error");

try {
    log.debug("Uh oh.");
    /* Something dangerous. */
} catch (error) {
    log.error(error);  // Stack trace is automatically logged for Error objects.
}

Usage

Use it like log.<level>(arg1, arg2, ...). You can pass in as many arguments as you'd like. Anything that is not an Error or a String will be JSON stringified.

The logger normally writes to process.stdout. If any of the arguments is an Error object, the logger will write the whole message to stderr instead of stdout (so call error.toString() first if you'd like the logger to write to stdout.

Levels

The five allowed levels are, in descending order of priority:

1. critical
2. error
3. warning
4. info
5. debug

You can (optionally) pass in a level as the second argument of the Logger constructor. This will set the default level. If you pass in something unrecognized, or don't pass in anything at all, the default level is set lower than debug. In other words, everything will get logged by default.

Methods

Logging methods:

• #critical(...): Log a message at the critical level.
• #error(...): Log a message at the critical level.
• #warning(...): Log a message at the warning level.
• #info(...): Log a message at the info level.
• #debug(...): Log a message at the debug level.

Other methods:

• #out(String): Write to process.stdout.
• #err(String): Write to process.stderr.
• #setLevel(level): Change the logger level.