Shorthand properties allow you to compose complex objects from other objects.
John Lindquist: [00:02] Where destructuring in ES6 allows you to easily get properties out of an object, this shorthand property syntax allows you to easily push properties in. It's like destructuring backwards.
[00:11] If I have a first name and a last name and I want to create a person, I can just say, "firstName, lastName." Then when I log out my person and I run this, you can see that it logs out an object with the first name of John and a last name of Lindquist.
[00:29] If I wanted to build some more objects, like I want to build a team. I have a mascot with a Moose, and I wanted to build a team like this, where I have a person and a mascot, and then I log out my team. I have a team object with a person of "firstName, lastName," John and Lindquist, with the mascot of moose.
[00:53] This syntax allows you to easily construct objects with the properties and things you already have and just build them up however you'd like.