log-fn v2.1.0

Log-fn

Logging library build with 'chalk'

Example use

// yarn add log-fn
const log = require('log-fn')
log('foo')

const x = {bar: {baz: 'foo'}}
log({x}, 'pattern')

Typing

log(...inputCollection: Array<any>, rules: String)

Rules

• Your last argument act as rule for logging.
• You can pass more than one rule using separator .
• For example log(1,'icon.back') or log(1,'spin.tag=foo')
• You can disable log-fn all along by setting process.env.LOG_FN_FLAG to false

Default behaviour

log(x)

log(1,2,3, ["foo"], null) // Line 1
log(1, {a: 1}, undefined) // Line 2
log('foo', 'bar') // Line 3

Line 1 will log all of the inputs using the first color of predefinet set of colors. Line 2 will log all of the inputs using the second color of predefinet set of colors.

When object is passed as part of inputCollection, it will go to the end of the log.

The reason is that chalk works with strings, and objects don't have toString method. So objects are logged with plain console.log, while all other types use chalk.

Line 3 will log only 'foo' as last argument 'bar' is a String and is used as rules option.

With background

(log(x, 'back'))

// if array with object

log(1,2,3, ["foo"], null, 'back') // Line 4
log(1, {a: 1}, undefined, 'back') // Line 5

The same as default behaviour, but we are setting not only the color of the text, but also its background.

Pattern logging

log({ x }, 'pattern')