Consola

Elegant Console Logger

Why?

• Easy to use
• Fancy output with Fallback for CI environments
• A global mockable stdout/stderr wrapper
• Pluggable reporters
• Consistent CLI experience
• Scoped Loggers

Installation

Using yarn:

yarn add consola

Using npm:

npm i consola

Getting started

const consola = require('consola')

// See types section for all available types
consola.start('Starting build')
consola.success('Built!')
consola.info('Reporter: Some info')
consola.error(new Error('Foo'))

Fancy Reporter

[2:17:17 PM] Starting build
[2:17:17 PM] [TEST] Log from test scope
[2:17:18 PM] Built!
[2:17:18 PM] Some info
[2:17:18 PM] Error: Foo

Minimal Reporter (CI)

Scoped Loggers

You can group logs using an scope:

const logger = consola.withScope('test')

logger.info('Log from test scope') // [Test] Log from test scope

Reporters

You can choose between one of the built-in reporters or bring your own.

By default FancyReporter is registered for modern terminals or BasicReporter will be used if running in limited environments such as CIs.

Available reporters:

• BasicReporter
• FancyReporter
• JSONReporter
• WinstonReporter

Please see Examples for usage info.

Creating your own reporter

A reporter is nothing more than a Class or Object that should expose log(logObj) method. See implementations to get idea how to write your own.

Types

You can think of types like extended logging levels in Consola's world.

A list of all available default types is here.

Creating a new instance

Consola has a global instance and it is recommended to use it everywhere. In case that you need more control, you can create a new instance too.

const { Consola, BasicReporter } = require('consola')


const consola = new Consola({
    level: 30,
    reporters: [],
    types: []
})

consola.add(BasicReporter)

API

• consola.<type>([logObj|message|error])

Log to all reporters. If a plain string or error is given it will be automatically translated to a logObject.

• add(reporter)

Register a custom reporter instance.

• remove(reporter)

Remove a registered reporter.

• clear()

Remove all current reporters (Useful for writing tests).

• withDefaults(defaults)

Create a wrapper interface with all types available and defaults applied to all logs.

• withScope(scope)

Shortcut to withDefaults({ scope }).

• level

The level to display logs at. Any logs at or above this level will be displayed.
List of available levels here

logObject

logObject is a free-to-extend object which will be passed into reporters.

Here are standard possible fields:

Common fields:

• message
• date
• scope

Extended fields:

• clear
• badge
• additional

Integrations

With jest

consola.clear().add({
  log: jest.fn()
})

With jsdom

{
  virtualConsole: new jsdom.VirtualConsole().sendTo(consola)
}

License

MIT