@sylphx/catThe fastest logger for JavaScript

import { createLogger, consoleTransport, prettyFormatter } from '@sylphx/cat'

const logger = createLogger({
  level: 'info',
  formatter: prettyFormatter(),
  transports: [consoleTransport()]
})

logger.info('Hello world!', { user: 'kyle' })

import { redactionPlugin } from '@sylphx/cat'

const logger = createLogger({
  plugins: [
    redactionPlugin({
      fields: ['password', '*.secret', '**.apiKey'],
      redactPII: true, // Credit cards, SSNs, emails
      preventLogInjection: true
    })
  ]
})

import { otlpTransport, tracingPlugin } from '@sylphx/cat'

const logger = createLogger({
  transports: [
    otlpTransport({
      endpoint: 'https://otlp-gateway.grafana.net/otlp/v1/logs',
      resourceAttributes: {
        'service.name': 'my-api',
        'service.version': '1.0.0'
      }
    })
  ],
  plugins: [tracingPlugin()]
})

// Sends to Grafana, Datadog, New Relic, AWS CloudWatch, etc.

import { tailSamplingPlugin } from '@sylphx/cat'

const logger = createLogger({
  plugins: [
    tailSamplingPlugin({
      adaptive: true,
      monthlyBudget: 10 * 1024 * 1024 * 1024 // 10 GB/month
    })
  ]
})

// Automatically keeps all errors, slow requests, 5xx responses
// Samples only 1% of successful requests