spread-3.js

const walkingAnimals = ["cats", "dogs"];
const flyingAnimals = ["eagle", "falcon"];

const animals1 = [...walkingAnimals, ...flyingAnimals];
const animals2 = ["dolphin", ...flyingAnimals, ...walkingAnimals];

console.log(animals1); // ["cats", "dogs", "eagle", "falcon"]
console.log(animals2); // ["dolphin", "eagle", "falcon", "cats", "dogs"]