倒计时 发送验证码

// 倒计时
export function TimerEnd (elm, iNum) {
  this.init(elm, iNum)
}
TimerEnd.prototype = {
  init: function (obj, iNum) {
    setTimeout(() => {
      this.oSecond = document.getElementById(obj)
      removeClass(this.oSecond, 'btn-red')
      this.oSecond.innerText = '60秒后重发'
      this.timer = null
      this.iSecond = 60
      if (!this.oSecond) return
      this.interval(iNum)
    }, 0)
    return this
  },
  interval: function (iNum) {
    var isec = iNum || this.iSecond
    addClass(this.oSecond, 'disabled')
    this.timer = setInterval(() => {
      this.oSecond.innerText =
        isec <= 10 ? '0' + --isec + '秒后重发' : --isec + '秒后重发'
      if (isec <= 0) {
        clearInterval(this.timer)
        removeClass(this.oSecond, 'disabled')
        addClass(this.oSecond, 'btn-red')
        this.oSecond.innerText = '重新获取'
      }
    }, 1000)
  },
  clearTimer: function () {
    this.timer && clearInterval(this.timer)
  }
}