vue引入报错Unknown custom element: <HelloWorld> - did you register the component correctly? For recursive components, make sure to provide the "name" option. found in ---> <App> <Root>

出现这种错误提示，通过查找最后发现配置项写的不对

在App。vue中的配置项component中应该加s

component:{

 

HelloWorld,

"School":School,

"Student":Student,

}