code: function humanizer (passedOptions) {
      var result = function humanizer (ms, humanizerOptions) {
        var options = extend({}, result, humanizerOptions || {})
        return doHumanization(ms, options)
      }
  
      return extend(result, {
        language: 'en',
        delimiter: ', ',
        spacer: ' ',
        conjunction: '',
        serialComma: true,
        units: ['y', 'mo', 'w', 'd', 'h', 'm', 's'],
        languages: {},
        round: false,
        unitMeasures: {
          y: 31557600000,
          mo: 2629800000,
          w: 604800000,
          d: 86400000,
          h: 3600000,
          m: 60000,
          s: 1000,
          ms: 1
        }
      }, passedOptions)
    }
docs: You can create a humanizer, which returns a function with default parameters.