小程序60s倒计时

Page({

  /**
   * 页面的初始数据
   */
  data: {
 
    //倒计时
    second:60,
    
  },
  onLoad: function(options) {
this.timer()
  },
 
  // 60s倒计时
  timer: function() {
    let promise = new Promise((resolve, reject) => {
      let setTimer = setInterval(
        () => {
          this.setData({
            second: this.data.second - 1
          })
          if (this.data.second <= 0) {
            this.setData({
             
              second: 60,
              alreadySend: false,
              send: true
            })
            resolve(setTimer)

          }
        }, 1000)
    })
    promise.then((setTimer) => {
      clearInterval(setTimer)
    })

  },

})