🖋️ @e280/sten

• logging utility
• zero dependencies
• an https://e280.org/ project

quick start

• install sten

  npm install @e280/sten

• make your logger

  import {Logger} from "@e280/sten"
  export const logger = new Logger()

• log stuff

  await logger.log("hello world!")
  await logger.error("bad stuff", new Error("oh no!"))

  

customize the logger

// defaults shown
export const logger = new Logger()
  .setWriter(Logger.writers.auto())
  .setColors(Logger.colors.auto())
  .setTheme(Logger.themes.auto())
  .setShaper(Logger.shapers.auto())

writers

the logger ultimately emits to stdout or stderr via a writer — the available writers are:

• auto — (default) detect environment and automatically choose deno, node, or console
• console — outputs to console.log and console.error
• node — outputs to process.stdout and process.stderr
• deno — outputs to Deno.stdout and Deno.stderr
• void — outputs nothing

colors

determines what happens when colors are used — available colors are:

• auto — (default) use color if it looks like we're in a color-supporting environment
• colorful — full ansi color support
• colorless — no colors (all color fns are duds)

themes

defines where certain colors will be used:

• auto — (default) uses the basic theme (in the future this might auto-detect from an env var)
• basic — standard colors, red errors, blue timestamps, etc

shapers

a shaper is a fn that transforms the content before it is logged — the available shapers are:

• auto — (default) standard setup which combines errors and timestamp together
• errors — displays error objects nicely
• timestamp — attaches a timestamp prefix to every message
• none — does nothing (leaves content as-is)

you can make your own shaper like this:

import {asShaper} from "@e280/sten"

const myShaper = asShaper(context => ({
  stdout: items => items,
  stderr: items => items,
}))

you can apply multiple shapers together like this:

logger.setShaper(
  myShaper,
  myOtherCustomShaper,
  Logger.shapers.errors(),
  Logger.shapers.timestamps(),
)

or you can use combineShapers

import {combineShapers} from "@e280/sten"

const megaShaper = combineShapers(
  myShaper,
  myOtherCustomShaper,
  Logger.shapers.errors(),
  Logger.shapers.timestamps(),
)

💖 made with open source love

build with us at https://e280.org/ but only if you're cool