How to parse the objects and get the specific field in node.js

Question

I retrieved the object type data from the firestore and stored in a variable document

{ Invite1: { Amount: 25, PhoneNumber: 917995954482 },
  Invite2: { Amount: 25, PhoneNumber: 918179405940 },
  Invite3: { Amount: 25, PhoneNumber: 918179441493 },
  Invite4: { Amount: 25, PhoneNumber: 918309097608 } }

Now, I need to get the PhoneNumber from all the Invite. After getting all the phone numbers into an array I need to check these Phone numbers already exists in database path like

/deyaPayUsers // collection
 {authid}    //document
     Name: abcd
     Phone Number: 987654321

Answer 1

Just try this :)

var phoneNumbers = [];

var data = { Invite1: { Amount: 25, PhoneNumber: 917995954482 },
  Invite2: { Amount: 25, PhoneNumber: 918179405940 },
  Invite3: { Amount: 25, PhoneNumber: 918179441493 },
  Invite4: { Amount: 25, PhoneNumber: 918309097608 } }

for(var k  in data){
    phoneNumbers.push(data[k].PhoneNumber);
}

Answer 2

Try

var phoneNumbers = Object.keys(document).map(item => document[item].PhoneNumber);

Edited to take document as an object instead of array.