In ES6, object literals support setting prototypes, shorthand assignments, defining methods, making super calls, and computing properties with expressions.

Let's see the following example, which creates an advisor object with a TeamMember object as its prototype:

1.  const advice = 'Stay hungry. Stay foolish.';
2. 
3.  let advisor = {
4.    __proto__: new TeamMember('Adam', ['Consulting']), 
5.    advice,
6.    greeting () {
7.      super.greeting();
8.      console.log(this.advice); 
9.    },
10.  [advice.split('.')[0]]: 'Always learn more'
11. };

Line 4, assigning the object of TeamMember to the advisor object's __proto__ property makes advisor an instance of TeamMember:

console.log(TeamMember.prototype.isPrototypeOf(advisor));  // true
console.log(advisor instanceof TeamMember);                // true

Line 5 is a shorthand assignment of advice:advice. Line 7 is creating the greeting() method of TeamMember, inside which it will invoke the greeting method of TeamMember:

advisor.greeting();   // I' m Adam. Welcome to the team!
                      // Stay hungry. Stay foolish.

In line 10, the Stay hungry property is calculated with bracket notation. And to access this property, in this case, because the property name contains a space, you need to use bracket notation, like this—advisor['Stay hungry'].