js Object reference bug All In One
arr1 = [1,2,3];
(3) [1, 2, 3]
arr2 = arr1;
(3) [1, 2, 3]
arr2.push(4);
4
arr1;
(4) [1, 2, 3, 4]
arr2;
(4) [1, 2, 3, 4]
arr1 = [1,2,3];
(3) [1, 2, 3]
// 解构赋值
arr2 = [...arr1];
(4) [1, 2, 3]
arr2.push(4);
4
arr1;
(4) [1, 2, 3]
arr2;
(4) [1, 2, 3, 4]