Check what happens when a new item is added to array. Is then a new instance created?

[mStirner]

E.g: Interfaces are stored in arrays under the device component. What happens when a new dataset is added to the interfaces array and the component update method is called. Is then a new interface instance created for the dataset?

I think not, how to handle that situation in the HTTP Routes?
Could be a smaller problem than expected.
For Interfaces a WebSocket server is created, if nothing is found with the _id.
Other arrays (from other componets) should not have custom "array"/item handling.

[mStirner]

Adding a new Object to arrays, does not automatically create a new class instance:

updated vault Vault {
  _id: '637a5b73f4be65f505a598f7',
  name: 'Test credentials',
  identifier: 'TEST',
  secrets: [
    Secret {
      name: 'Username',
      key: 'USERNAME',
      value: [Getter/Setter],
      _id: '637a5b7df4be65f505a598f9',
      description: null
    },
    {
      name: 'Password',
      key: 'PASSWORD',
      value: 'Pa$$w0rd',
      _id: '637a5b7df4be65f505a598fa',
      description: null
    }
  ],
  timestamps: { created: 1668963187564, updated: 1668963197229 }
} [
  Secret {
    name: 'Username',
    key: 'USERNAME',
    value: [Getter/Setter],
    _id: '637a5b7df4be65f505a598f9',
    description: null
  },
  {
    name: 'Password',
    key: 'PASSWORD',
    value: 'Pa$$w0rd',
    _id: '637a5b7df4be65f505a598fa',
    description: null
  }
]

        C_VAULT.add({
            name: "Test credentials",
            identifier: "TEST",
            secrets: [{
                name: "Username",
                key: "USERNAME",
                value: "marc.stirner@example.com"
            }]
        }, (err, item) => {

            console.log("Vault:", err || item);


        });

        C_VAULT.events.on("update", (item) => {
            console.log("Updated vault", item, item.secrets);
        });

Updated via HTTP API. (http://{{HOST}}:{{PORT}}/api/vault/637a5b73f4be65f505a598f7)

[mStirner]

See 202efca.
As thought, nothing happens when a new item is added to a array which contains objects that represents class instances.

How should this be handled?