Ember/5/Fpe Computed

import EmberObject from "@ember/object";

let Person = EmberObject.extend({
  init() {
    this._super(...arguments);

    this.firstName = "Betty";
    this.lastName = "Jones";
  },

  fullName: function () {
    return `${this.firstName} ${this.lastName}`;
  }.property("firstName", "lastName"),
});

let client = Person.create();

client.get("fullName"); // 'Betty Jones'

client.set("lastName", "Fuller");
client.get("fullName"); // 'Betty Fuller'

import EmberObject, { computed } from "@ember/object";

let Person = EmberObject.extend({
  init() {
    this._super(...arguments);

    this.firstName = "Betty";
    this.lastName = "Jones";
  },

  fullName: computed("firstName", "lastName", function () {
    return `${this.firstName} ${this.lastName}`;
  }),
});

let client = Person.create();

client.get("fullName"); // 'Betty Jones'

client.set("lastName", "Fuller");
client.get("fullName"); // 'Betty Fuller'