text: /* eslint-disable no-extend-native */
  Date.prototype.format = function(fmt) {
    var o = {
      'M+': this.getMonth() + 1,
      'd+': this.getDate(),
      'h+': this.getHours(),
      'm+': this.getMinutes(),
      's+': this.getSeconds(),
      'q+': Math.floor((this.getMonth() + 3) / 3),
      S: this.getMilliseconds()
    }
    if (/(y+)/.test(fmt)) {
      fmt = fmt.replace(
        RegExp.$1,
        (this.getFullYear() + '').substr(4 - RegExp.$1.length)
      )
    }
    for (var k in o) {
      if (new RegExp('(' + k + ')').test(fmt)) {
        fmt = fmt.replace(
          RegExp.$1,
          RegExp.$1.length === 1 ? o[k] : ('00' + o[k]).substr(('' + o[k]).length)
        )
      }
    }
    return fmt
  }
  Date.prototype.getSomeDay = function(offset) {
    this.setTime(this.getTime() + 1000 * 60 * 60 * 24 * offset)
  
    return this
  }
  