如何删除json中的某个变量key

Question

假设我的json对象是这样的

var User: {"phone": {"key1": "value", "key2": "value"}}

然后，我要删除key1属性，用下面代码就能删除

delete User.phone.key1;

但是，当我要删除的key是个传入的变量，下面这段代码就不管用了

var type = "key1";
delete User.phone.type;

这是为什么呢？

Answer 1

delete User.phone.type 意思是删除key为“type”的值
你应该用 delete User.phone[type]