vue3生命周期函数

跟vue2的顺序相同，只是有些函数名不一样

parent setup
parent beforeCreate
parent created
parent beforeMount
child setup
child beforeCreate
child created
child beforeMount
child mounted
parent mounted
parent beforeUnmount
child beforeUnmount
child unmounted
parent unmounted

相对应的组合式api:
https://v3.cn.vuejs.org/api/composition-api.html#%E7%94%9F%E5%91%BD%E5%91%A8%E6%9C%9F%E9%92%A9%E5%AD%90