LogPose

Helps you to not get lost.

$ npm i log-pose --save
# or `yarn add log-pose`

API

Import the module and retrieve a shared logger instance.

import LogPose from 'log-pose';

// define logging level
LogPose.setLevel('verbose');

// get shared logger instance
const log = LogPose.getLogger();

// calling `newLogger()` returns a single method
const fail = LogPose.newLogger('my-app', 'verbose');

• pause() — Pause the logging output
• resume() — Resume the logging output
• setLevel(type: String|Boolean) — Set a logging level to disable/enable verbs; if false is given logging gets disabled
• setLogger([stdout: Object]) — Set the standard-output for logging; if any falsy value is given, then the entire logging is disabled. Given stdout is used to output log messages
• getLogger([depth: Number[, stdout: Object]]) — Returns a shared logger instance; depth is used on status formatting
• newLogger(prefix: String[, level: String|Number[, depth: Number, stdout: Object]]) — Returns a single logging method; actually, the shared logger is built from those methods. Methods are prefixed and receive a base level and depth; their output is skipped if given level is above the currently defined

Log levels are info, debug and verbose.

Logger

It's a function that can print statuses:

// single status
log('testing');

// prefixed status
log('kind', 'value');

// async status
async function main() {
  // single task delayed
  await log('long task', () => new Promise(resolve => setTimeout(resolve, 1000)));

  // prefixed task delayed
  await log('kind', 'value', () => new Promise(resolve => setTimeout(resolve, 1000)));

  // prefixed task delayed, with callback
  await log('write', 'filepath', done => setTimeout(() => {
    // custom feedback on logs
    done('filepath', 'failed', 'fail');
  }, 1000));
}

main();

Also, it have some methods:

• printf(...) — Prints always, with formatting enabled
• write(...) — Prints always, without formatting
• info(...) — Prints if level is > 0
• debug(...) — Prints if level is >= 1
• verbose(...) — Prints if level is >= 2
• isInfo() — Returns true if level is > 0
• isDebug() — Returns true if level is >= 1
• isVerbose() — Returns true if level is >= 2
• isEnabled() — Returns true if level is > 0

Formatting works calling built-in util.format() on printing, e.g.

log.info('{%info.bgBlue.white Text with spaces and values: %s%}\n', 42);

Available symbols are:

• tick → ✔
• cross → ✖
• star → ★
• line → ─
• info → ➲
• reload → ↺
• pointer → ›
• warning → ⚠

Built-in types are:

• exception → line.bgRed.bold
• featured → star.bgBlue.bold
• failure → warning.bgRed.white
• success → line.green
• error → line.red
• tip → star.yellow
• link → line.cyan
• item → line.gray
• warn → warning.bold
• info → info.blue
• fail → cross.red
• wait → reload.gray
• end → tick.cyan
• log → pointer.gray
• ok → tick.green

Using these you can short your code:

log.info('{%ok Text with spaces and values: %s%}\n', 42);

Color names are defined by Chalk.