Dates.js

import moment from 'moment'

export default {
  parse(dueDateProvided, remainingFormats=Object.keys(this.formats)) {
    if (remainingFormats.length === 0)
      return null

    const [ format ] = remainingFormats.splice(0, 1)
    if (typeof dueDateProvided === 'string' && !this.formats[format].regexp.test(dueDateProvided))
      return this.parse(dueDateProvided, remainingFormats)

    const date = moment(dueDateProvided, format)
    if (!date.isValid())
      return this.parse(dueDateProvided, remainingFormats)

    return date.toDate()
  },

  formats: {
    'YYYY-MM-DD': { regexp: /\d{4}-\d{1,2}-\d{1,2}/ },
    'MM/DD/YYYY': { regexp: /\d{1,2}\/\d{1,2}\/\d{4}/ },
    'MM-DD-YYYY': { regexp: /\d{1,2}-\d{1,2}-\d{4}/ }
  }
}