JSFiddle - React, Tailwind, and code Playground

JavaScript

const a = [1,2,3,4];
const b = [...a, 5];
const c = [0, ...a, 5];
console.log('Value of a = ', a);
console.log('Value of b = ', b);
console.log('Value of c = ', c);

const obj1 = { a: 'Tree', b: 'Flower', c: 'Fruit' };
const obj2 = { ...obj1, a: 'plant' };
const obj3 = { ...obj1, d: 'seed' };

console.log('Value of obj1 = ', obj1);
console.log('Value of obj2 = ', obj2);
console.log('Value of obj3 = ', obj3);