Vue父子組件生命過程

加載渲染過程

　　父beforeCreate->父created->父beforeMount->子beforeCreate->子created->子beforeMount->子mounted->父mounted

子組件更新過程

　　父beforeUpdate->子beforeUpdate->子updated->父updated

父組件更新過程

　　父beforeUpdate->父updated

銷燬過程

　　父beforeDestroy->子beforeDestroy->子destroyed->父destroyed