JSFiddle - React, Tailwind, and code Playground

by Göran Andersson

JavaScript

var firstObj = {
    name: 'John',
    lastName: [ 'Doe' ]
};
var secondObj = {
    age: '20',
    sex: 'male',
    lastName: [ 'Dorian' ]
};

//Object.merge(firstObj, secondObj);
Object.append(firstObj, secondObj);

console.log(firstObj.lastName[0]); // Dorian

secondObj.lastName[0] = 'McEnroe';

console.log(firstObj.lastName[0]); // McEnroe