custom component can't use kabab case

[neozo]

custom component can't use kabab case , capital case is work fine.

<HelloWorld> work fine
<hello-world> some error

Any options can resovle the problem?

[neozo]

the problem resovled, component ref use the same name with the component will make some error, but why??
<hello-world ref="helloWorldRef"> well done
<hello-world ref="helloWorld"> error