Parent
-- Child1
-- Child2
装载
parent beforeCreate
parent created
parent beforeMount
child1 beforeCreate
child1 created
chidl1 beforeMount
child2 brforeCreate
child2 created
child2 beforeMount
child1 mounted
child2 mounted
parent mounted
更新
parent beforeUpdate
child1 beforeUpdate
child2 beforeUpdate
child1 updated
child2 updated
parent updated
销毁
parent beforeDestory
child1 beforeDestory
child2 beforeDestory
child1 destoryed
child2 destoryed
parent destoryed