JSFiddle - React, Tailwind, and code Playground

JavaScript

const item = {
  name: "firstItem",
  color: "red",
  shape: "square",
  size: "big",
  itemChild : {
  	cat: "category1",
    age: "10"
  }
}

let {
	name, 
  color,
  shape,
  size,
  itemChild = {},
  itemChild: {
  	cat = "",
    age = ""    
  }
} = item;

if (itemChild) {
	console.log("Child", cat, age);
} else {
  console.log("Parent", name, color);
}