JSFiddle - React, Tailwind, and code Playground

HTML

<div id="display"></div>

JavaScript

var write = function (val) {
    var display = document.getElementById('display');
    display.innerHTML = JSON.stringify(val);
};

var person = {
    name: 'John Doe',
    age: 44,
    isMarried: true,
    spouse: {
        name: 'Jane Doe',
        age: 45          
    }
};

// Using dot or subscript notation, change the person's and spouse's names
person.name = 'Jeff Ray';
person.spouse.name = 'Jesse Ray';

// Add favoriteColor properties to both person and the spouse subobject.
person.favoriteColor = 'Crimson';
perosn.spouse.favoriteColor = 'Mauve';


write(person);