spread.js

//we are initiate an array 
const hobbies = ["Sports", "Cooking"];

//we are copy all the elements to the copyOfHobbies array
const copyOfHobbies = [...hobbies];

/**
* we are copy all the elements of the copyOfHobbies array into 
* copyOfHobbies2 array and adding one more hobby to there
*/
const copyOfHobbies2 = [...hobbies, "Cricket"];