展开数组展开对象 let arr1 = [1, 2, 3];let arr2 = [4, 5, 6];let arr3 = [...arr1, ...arr2];let obj1 = { a: 1, b: 2 };let obj2 = { c: 3 }let obj3 = { ...obj1, ...obj2 };console.log(arr3,obj3)