quickmodel / IQChange

Interface: IQChange<T>

Payload delivered to each observer callback whenever a model property changes.

Example

const user = new UserModel({ name: 'Alice', age: 30 });
user.$qSubscribe((change: IQChange) => {
  console.log(change.field);  // 'name'
  console.log(change.prev);   // 'Alice'
  console.log(change.next);   // 'Bob'
});
user.name = 'Bob';

Type Parameters

T

T = unknown

Type of the property value that changed (defaults to unknown).

Properties

field

field: string

Name of the field that changed. Matches the TypeScript property name declared in the model class.

---

next

next: T

Value of the field after the change, after type transformation. This is the value that is now stored in the model.

---

prev

prev: T

Value of the field before the change, after type transformation. For example, if the field is typed as Date, prev is already a Date instance (not the raw string that was assigned).