Implementation of a simple login page for WeChat applet (with source code)

<view class="v1" style="height:{{clientHeight?clientHeight+'px':'auto'}}">
 
 <!-- v2 parent container child view uses absolute layout -->
   <view class="v2">
     <view class="dltext" style="width: 232rpx; height: 92rpx; display: block; box-sizing: border-box; left: 0rpx; top: -2rpx">Login</view>
  
     <!-- Phone Number-->
     <view class="phoneCs">
       <!-- <image src="/images/zhang.png" class="ph"></image> -->
       <input placeholder="Please enter your account number" type="number" bindinput="content" />
     </view>
     <!-- Password -->
     <view class=passwordCs">
       <!-- <image src="/images/mi.png" class="ps"></image> -->
       <input placeholder="Please enter your password" type="password" bindinput="password" />
     </view>
     <!-- Login Button-->
     <view class="denglu">
       <button class="btn-dl" type="primary" bindtap="goadmin">Log in</button>
     </view>
   </view>
 </view>

/* pages/login/login.wxss *//* The largest parent element*/
.v1{
  display: block;
  position:absolute;
  width: 100%;
  background-color: rgb(250, 248, 248);
}
/* White area */
.v1 .v2{
  position: relative;
  margin-top: 150rpx;
  left: 100rpx; 
  width: 545rpx;
  height: 600rpx;
  background-color: rgb(250, 248, 248);
  border-radius: 50rpx;
}
/* Login text in the white area*/
.v1 .v2 .dltext{
  margin-top: 50rpx;
  position: absolute;
  margin-left:50rpx;
  width: 150rpx;
  height: 100rpx;
  font-size: 60rpx;
  font-family: Helvetica;
  color: #000000;
  line-height: 100rpx;
  letter-spacing: 2rpx;
}
/* Mobile phone picture + input box + underline parent container view */
.v1 .v2 .phoneCs{
  margin-top: 200rpx;
  margin-left: 25rpx;
  position: absolute;
  display: flex;
  width:480rpx;
  height: 90rpx ;
  background-color: white;
  
}
/* Mobile phone icon */
.v1 .v2 .phoneCs .ph{
  margin-top: 5rpx;
  margin-left: 30rpx;
  width: 55rpx;
  height: 55rpx;
}
/* Phone number input box*/
.v1 .v2 .phoneCs input{
  width: 400rpx;
  font-size: 30rpx ;
  margin-top: 25rpx;
  margin-left: 30rpx;
}
/* Password icon + input box + small eye icon + underline parent container view */
.v1 .v2 .passwordCs{
  margin-top: 350rpx;
  margin-left: 25rpx;
  position: absolute;
  display: flex;
  width:480rpx;
  height: 90rpx ;
  background-color: white;

}
/* Password icon */
.v1 .v2 .passwordCs .ps{
  margin-top: 5rpx;
  margin-left: 30rpx;
  width: 55rpx;
  height: 55rpx;
}
/* Eye icon */
.v1 .v2 .passwordCs .eye{
  margin-top: 5rpx;
  margin-left: 65rpx;
  width: 55rpx;
  height: 55rpx;
}
/* Password input box*/
.v1 .v2 .passwordCs input{
  width: 400rpx;
  font-size: 30rpx ;
  margin-top: 25rpx;
  margin-left: 30rpx;
}
/* Login button container view */
.v1 .v2 .denglu{
  width: 480rpx;
  height: 80rpx;
  position: absolute;
  margin-top:515rpx;
  margin-left:25rpx;
  
}
/* Login button */
.v1 .v2 .denglu button{
  padding: 0rpx;
  line-height: 70rpx;
  font-size: 30rpx;
  width: 100%;
  height: 100%;
  border-radius: 5rpx;
}

//index.js
//Get the application instance const app = getApp()
 let username=''
 let password=''
Page({
  data: {
    username: '',
    password: '',
    clientHeight:''
  },
  onLoad(){
    var that=this
    wx.getSystemInfo({ 
      success: function (res) { 
        console.log(res.windowHeight)
          that.setData({ 
              clientHeight:res.windowHeight
        }); 
      } 
    }) 
  },
  //Protocol goxieyi(){
   wx.navigateTo({
     url: '/pages/oppoint/oppoint',
   })
  },
  //Get the input content content(e){
    username=e.detail.value
  },
  password(e){
    password=e.detail.value
  },
  //Login event goadmin(){
    let flag = false // indicates whether the account exists, false is the initial value if (username=='')
    {
      wx.showToast({
        icon:'none',
        title: 'Account cannot be empty',
      })
    }else if(password==''){
      wx.showToast({
        icon:'none',
        title: 'The password cannot be empty',
      })
    }else{
      wx.cloud.database().collection('adminShop')
      .get({
        success:(res)=>{
          console.log(res.data)
          let admin = res.data
          for (let i = 0; i < admin.length; i++) { //Traverse the database object collection if (username === admin[i].username) { //Account already exists flag=true;
              if (password !== admin[i].password) { //Judge whether the password is correct or not wx.showToast({ //Show password error information title: 'Wrong password!!',
                  icon: 'error',
                  duration: 2500
                });
               break;
              } else {
                wx.showToast({ //Show login success information title: 'Login successful!!',
                  icon: 'success',
                  duration: 2500
                })
                flag=true;
                wx.setStorageSync('admin', password)
               wx.navigateTo({
                 url: '/pages/admin/admin',
               })
                break;
              }
            }
          };
          if(flag==false)//After traversing the data, it is found that there is no such account {
            wx.showToast({
              title: 'This user does not exist',
              icon: 'error',
              duration: 2500
            })
          }
        }
      })
    }
  },
})