Wechat mini program sends verification code after 60 seconds countdown function, effect picture:

The complete code

index.wxml

<! --index.wxml--> <view class="container">
  <view class="section"> < span style = "box-sizing: border-box! Important"Please enter your mobile phone number." type="number" maxlength="11" bindinput="inputPhoneNum" auto-focus />
        <text wx:if="{{send}}" class="sendMsg" bindtap="sendMsg"> send </text> <text wx:if="{{alreadySend}}" class="sendMsg" >{{second+"s"}}</text>
    </view>
</view>
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index.wxss

/**index.wxss**/
.userinfo {
  display: flex;
  flex-direction: column;
  align-items: center;
}
.section {
display: flex;
margin: 16rpx;
padding: 16rpx;
border-bottom: 1rpx solid #CFD8DC;
}
 
text {
  width: 200rpx;
}
 
button {
  margin: 16rpx;
}
 
.sendMsg {
  font-size: 12;
  margin-right: 0;
  padding: 0;
  height: inherit;
  width: 80rpx;
}
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index.js

//index.js // getApp instance const app = getApp() Page({data: {send:true,
    alreadySend: false,
    second: 60,
    disabled: true,
    phoneNum: ' '}, // Phone number part inputPhoneNum:function (e) {
    let phoneNum = e.detail.value
    this.setData({
      phoneNum: phoneNum
    })
  },
  sendMsg: function () {
    var phoneNum = this.data.phoneNum;
    if(phoneNum == ' '){
      wx.showToast({
        title: 'Please enter your mobile phone number',
        icon: 'none',
        duration: 2000
      })
      return; } // this. SetData ({alreadySend:true,
      send: false
    })
    this.timer()
  },
  showSendMsg: function () {
    if(! this.data.alreadySend) { this.setData({ send:true
      })
    }
  },
  hideSendMsg: function () {
    this.setData({
      send: false,
      disabled: true,
      buttonType: 'default'
    })
  },
  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)
    })
  },
})
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Complete login message authentication code examples of reference: blog.csdn.net/zuoliangzhu…