const firstList = [1, 2, 3] const secondList = [4, 5, 6] const thirdList = firstList.concat(secondList) console.log(thirdList) // [1, 2, 3, 4, 5, 6]
const firstList = [1, 2, 3] const secondList = [4, 5, 6] const thirdList = firstList.concat(secondList) console.log(thirdList) // [1, 2, 3, 4, 5, 6]