delete 和vue.delete 删除数组的区别

delete 删除数组元素，只是被删除的数组元素变成了empty/undefined,其它元素不变,数组长度不变，键值对应也不变

let arr1 = [1, 2, 3, 4];
delete arr1[1];
console.log(arr1);

image.png

vue.delete 删除数组元素，是直接删除了元素，改变了数组的键值

let arr2 = [1, 2, 3, 4];
this.$delete(arr2, 1);
console.log(arr2);

image.png