Uniapp H5 page calls wechat payment

/* payment */
<!--
 1. Click the payment button to trigger payOrder
 2.postJSON Is the encapsulated request method , Parameters subData It is based on the backend  
 3.api   It is the back-end payment interface that returns the corresponding things of the order 
 4. Trigger wechat payment api
-->
// Pay now 
 payOrder(order_id,order_money){
     
	let that=this;
	let subData={
    
		user_id:uni.getStorageSync('userInfo').user_id, // user id
		payment_mode:2,   // Payment type ,
		money:order_money,   // Pay the amount 
		pay_type:1,    // Order payment 
		order_id:order_id   // Order id
	}
	postJSON(api,subData,res=>{
    
		if(res.data.status==1){
    
			console.log(' Get payment parameters :'+res.data.data.timeStamp)
			console.log(' Get payment parameters :'+res.data.data.nonceStr)
			console.log(' Get payment parameters :'+res.data.data.package)
			console.log(' Get payment parameters :'+res.data.data.paySign)
			that.payApi(res.data.data.timeStamp,
						res.data.data.nonceStr,
						res.data.data.package,
						res.data.data.paySign)
		}else{
    
			that.$toast(res.data.message,'none');
		}
	});	
 },

// payment 
 payApi(timeStamp,nonceStr,packages,paySign){
    
    let that=this;
    uni.requestPayment({
    
      'timeStamp':timeStamp,   // Backstage return 
      'nonceStr': nonceStr,// Backstage return , Random string , The length is 32 Less than characters .
      'package': packages,// Backstage return , Unified order interface returns  prepay_id  Parameter values 
      'signType': 'MD5',    // Signature type 
      'paySign': paySign,// Backstage return , Signature 
      "success":function(res){
    
       // Operation after successful payment , Pop up prompt or jump to the success page 
        uni.redirectTo({
    
          url: 'url',
        })
       },
      "fail":function(err){
    
         // Payment failed operation , Pop up prompt or jump to the success page 
         uni.showToast({
    
          title: ' Failure to pay ',
          icon: 'none'
         })
        uni.redirectTo({
    
           url: 'url',
        })
      }
    })
  },