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Tiny Logger 🌱

A simple, no fuss and slightly opinionated logger for Deno.

Logs to console and also writes log entries to either a Csv file or Txt file with Json objects.

  • CSV file (.csv)
  • JSON Objects (.txt)

Csv log files are often a convenient format and are TinyLogger’s default, however this can be easily changed to Json objects written to a .txt file as shown in the LogOption interface below. Additional logfiles will be generated when maxBytes is reached and appended with a incrementing number.

Source and message function parameters are required to log a message. See usage examples below.

Log file names are opinionated and stamped with the TinyLogger object’s instantiation date and time however they can have a custom label.

Example file names:

  • Default: log.2023-01-21T00-34-15.csv|txt
  • Or with example ‘myCoolApp’ logLabel specified: myCoolApp.log.2023-01-21T00-34-15.csv|txt


interface LogOptions {
  format?: 'csv' | 'json' // file extensions respectively are .csv or .txt file
  disableConsoleLogging?: boolean // don't write to console
  consoleOutput?: 'raw' | 'pretty'
  logLabel?: string // <logLabel>.log.<instantiation-date-time>.csv|txt
  maxBytes?: number // default 10mb

debug(source: string, message: string)
info(source: string, message: string)
warn(source: string, message: string)
error(source: string, message: string)

// Basic usage with interface defaults and file logging disabled
const logger = new TinyLogger
logger.error('Some Module', 'Oh snap! Something went wrong :(')

// Advanced usage with custom options specified and file logging enabled
const logger = new TinyLogger({
  path: './logs', maxBytes: 5242880, format: 'json', consoleOutput: 'raw'
await logger.enableFileLogging('./logs') // path is optional defaults to current directory

logger.error('Some Module', 'Oh snap! Something went wrong :(')

Pretty console output

Raw console output