How to get field values in onsuccess method of lightning-record-edit-form?

Sample Code:

LWC HTML:

1. <template>  
2.   
3.     <div class="slds-box slds-theme_default">  
4.   
5.         <lightning-record-edit-form record-id="0013i00000362blAAA"    
6.                                     object-api-name="Account"    
7.                                     onsuccess={handleSuccess}>    
8.   
9.             <lightning-messages></lightning-messages>    
10.             <lightning-output-field field-name="Name"></lightning-output-field>    
11.             <lightning-input-field field-name="Industry"></lightning-input-field>    
12.             <lightning-input-field field-name="Description"></lightning-input-field>    
13.             <lightning-input-field field-name="Rating"></lightning-input-field>    
14.             <lightning-button class="slds-m-top_small"    
15.                             variant="brand"    
16.                             type="submit"    
17.                             name="update"    
18.                             label="Update">    
19.             </lightning-button>    
20.   
21.         </lightning-record-edit-form>   
22.       
23.     </div>  
24.   
25. </template>  

LWC JavaScript:

1. import { LightningElement } from 'lwc';  
2.   
3. export default class Sample extends LightningElement {  
4.   
5.     handleSuccess( event ) {    
6.     
7.         const payload = event.detail;            
8.         var objJSON = JSON.parse(JSON.stringify(payload));  
9.         alert(objJSON["fields"]["Industry"]["value"]);    
10.     
11.     }  
12.   
13. }  

LWC meta.xml:

1. <?xml version="1.0" encoding="UTF-8"?>  
2. <LightningComponentBundle xmlns="http://soap.sforce.com/2006/04/metadata">  
3.     <apiVersion>47.0</apiVersion>  
4.     <isExposed>false</isExposed>  
5.     <targets>  
6.         <target>lightning__Tab</target>  
7.     </targets>  
8. </LightningComponentBundle>  

Output: