在Javascript中从另外两个数组构建一个新数组

const array1 = [1, 2, 3];
const array2 = [4, 5, 6];

const newArray = array1.concat(array2);
console.log(newArray); // [1, 2, 3, 4, 5, 6]

const array1 = [1, 2, 3];
const array2 = [4, 5, 6];

const newArray = [...array1, ...array2];
console.log(newArray); // [1, 2, 3, 4, 5, 6]