@difizen/mana-observable/es/decorator.js

import { Observability, ObservableProperties } from "./utils";

/**
 * Define observable property
 */
export function prop() {
  return function (target, propertyKey) {
    ObservableProperties.add(target.constructor, propertyKey);
  };
}

/**
 * Define property that should not be observable
 */
export function origin() {
  return function (target, propertyKey) {
    Observability.defineOrigin(target.constructor, propertyKey);
  };
}