format-log.js

function typof (v) {
  var s = Object.prototype.toString.call(v)
  return s.substring(8, s.length - 1)
}

function isDebugMode () {
  /* eslint-disable no-undef */
  return typeof __channelId__ === 'string' && __channelId__
}

export default function formatLog () {
  for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
    args[_key] = arguments[_key]
  }
  const type = args.shift()
  if (isDebugMode()) {
    args.push(args.pop().replace('at ', 'uni-app:///'))
    return console[type]['apply'](console, args)
  }

  var msgs = args.map(function (v) {
    var type = Object.prototype.toString.call(v)

    if (type.toLowerCase() === '[object object]') {
      try {
        v = '---BEGIN:JSON---' + JSON.stringify(v) + '---END:JSON---'
      } catch (e) {
        v = '[object object]'
      }
    } else {
      if (v === null) {
        v = '---NULL---'
      } else if (v === undefined) {
        v = '---UNDEFINED---'
      } else {
        var vType = typof(v).toUpperCase()

        if (vType === 'NUMBER' || vType === 'BOOLEAN') {
          v = '---BEGIN:' + vType + '---' + v + '---END:' + vType + '---'
        } else {
          v = String(v)
        }
      }
    }

    return v
  })
  var msg = ''

  if (msgs.length > 1) {
    var lastMsg = msgs.pop()
    msg = msgs.join('---COMMA---')

    if (lastMsg.indexOf(' at ') === 0) {
      msg += lastMsg
    } else {
      msg += '---COMMA---' + lastMsg
    }
  } else {
    msg = msgs[0]
  }

  console[type](msg)
}