vue父子组件加载顺序parentbeforeCreateparentcreatedparentbeforeMountchildbeforeCreatechildcreatedchildbeforeMountchildmountedparentmountedchildcomponentupdatesequence如果有props的话是四步，如果没有props则两步不会触发父亲的钩子。parentbeforeUpdatechildbeforeUpdatechildupdatedparentupdatedparentcomponentupdatesequenceisparentbeforeUpdatechilddeactivatedparentupdateddeactivation进程是parentbeforeDestroychildbeforeDestroychilddestroyedparentdestroyed
