Compact pared down version of npm debug module

demo.js

const debug=require('./qdebug.js')

const log1 = debug('log1')
const log2 = debug('log2')
const sublog = log1.ext('sublog')

log1.info('hello world', {test:Math.random()})
log2.info('hello world', {test:Math.random()})
sublog.info('hello world', {test:Math.random()})

`Console Output: 
2021-04-15T14:31:25.877Z [info] log1 :: hello world { test: 0.44275945387389326 }
2021-04-15T14:31:25.898Z [info] log2 :: hello world { test: 0.15378543632861819 }
2021-04-15T14:31:25.901Z [info] log1.sublog :: hello world { test: 0.5442912417062558 }
`

qdebug.js

function qdebug(name, timestamp=true, delimiter=false) {
  let dbg = function() {
    let args = []
    if(timestamp)args.push((new Date()).toISOString())
    args=args.concat([...arguments])
    if(delimiter)args.push(`\n${delimiter}`)
    console.log.apply(
      console,
      args
    )
  }

  const subfns=["error", "warn", "info", "http", "verbose", "debug", "silly"]
  subfns.forEach(subfn => {
      if (subfn === 'error') {
        dbg[subfn] = function() {
          let err
          try { throw new Error() } catch (e) { err = e }       
          dbg(`[${subfn}] ${name || ''} ::`, ...arguments, err)
        }
      } else {
        dbg[subfn] = function() {
          dbg(`[${subfn}] ${name || ''} ::`, ...arguments)
        }
      }
    })

  dbg.ext = function(subname, subtimestamp, subdelimiter) {
    if (!subname) return dbg
    return qdebug(
      name ? `${name}.${subname}` : subname, 
      subtimestamp==undefined ? timestamp : subtimestamp,
      subdelimiter==undefined ? delimiter : subdelimiter
    )
  }
  return dbg
}

module.exports = qdebug