How can I write to file without colors and to console with colors?

I made this function which console logs and writes to file but I’m not able to have the console with colors and the file output without colors

process.env.DEBUG = 'my_app:*'
process.env.DEBUG_COLORS = false
const debug = require('debug')

debug.log = (...args) => {
    console.log(...args)
    const file = 'my_file.txt'
    const line = formatArgs(args)
    fs.appendFileSync(file, line + '\n')
  }
}

[yoodu]

I filter it myself:

debug.log = (...args) => {
  console.log(...args) 
  const file = 'log.txt'
  args[0] = args[0].split('%c').join('') //remove%c
  const line = util.inspect(
    args.filter(item => {
      if (!item || typeof item !== 'string') return true
      return item.substring(0, 6) !== 'color:'
    })
  )
  let d = new Date(Date.now() + 28800000)
    .toJSON() //to 2019-04-20T06:20:54.513Z
    .replace('T', ' ')
    .substring(0, 23)
    .split(/[-]/) 
    .join('') //time fromat: 20190704 21:30:02.489
  fs.appendFileSync(file, d + ' ' + line + '\n')
}

output:

//20190704 21:30:02.492 [ 'main testing +2ms' ]

[heteo]

ok