`watchQuery` can't work with `v2.1.3`

watchQuery can’t work with v2.1.3

I tried it like this:

import { Vue, Component } from 'nuxt-property-decorator';


@Component({
     ...
})
export default class IndexPage extends Vue {

    watchQuery: string[] = ['label', 'page'];
...

So strange, i see other hooks like asyncData works well, but watchQuery does nothing when query changes.

Here is a repository to show a demo: https://github.com/shalldie/nuxt-ts-watchQuery

[shalldie]

I found that,

watchQuery must be part of ComponentOptions layout must be a static field of class.

I think thease should be the fields of class instance, or, a description should be in the readme.md

[genu]

Can we have some clarity here? I don’t think I understand the accepted workaround.

I get typing error when I add watchQuery to @Component