var items = ["item1", "item2", "item3"] var copie = []; items.forEach(function(item){ copie.push(item); });
users.forEach((user, index)=>{ console.log(index); // Prints the index at which the loop is currently at });
const iterable = [...]; for (const [index, elem] in iterable.entries()) { f(index, elem); } // or iterable.forEach((elem, index) => { f(index, elem); });