Boolean

Specifies if the property should be enumerable. By default, all properties except for ones with defined getters, async, and value are serialized.

You can prevent a property from being serialized like:

import { ObservableObject } from "can/everything";

class MyMap extends ObservableObject {
  static props = {
    propertyName: {
      enumerable: false
    },
    secondPropertyName: String
  };
}

const map = new MyMap({ propertyName: "foobar", secondPropertyName: "bar" });

console.log( map.serialize() ); //-> {secondPropertyName: "bar"}

Make a getter property part of the serialized result like:

import { ObservableObject } from "can/everything";

class MyMap extends ObservableObject {
  static props = {
    propertyName: {
      get() {
        return "test";
      },
      enumerable: true
    }
  };
}

const map = new MyMap();

console.log( map.serialize() ); //-> { propertyName: "test" }

enumerable also controls for/in loops, Object.assign, and Object.keys, among others. See enumerability for more information.