vue父组件子组件生命周期钩子执行顺序

1.首次加载过程
父beforeCreate -> 父created -> 父beforeMount -> 子beforeCreate -> 子created -> 子beforeMount ->
子mounted -> (子activated) -> 父mounted
2.父组件更新过程
父beforeUpdate -> (子deactivated) -> 父updated
3.子组件更新过程
父beforeUpdate -> 子beforeUpdate -> 子updated -> 父updated
4.销毁过程
父beforeDestroy-> 子beforeDestroy -> 子destroyed -> 父destroyed

总结：从外到内，再从内到外