What is the @Component component type for?

Question

typescript

An example is taken here

What gives if we specify the type of the component?
It works without it, so why then?

Answer 1

In this particular case, nothing. However, this generic is used to infer types within the object passed to @Component.

@Component({
  methods: {
    getd(){
      alert(this.messages) // Property "mesages" does note exist on type Vue
    }
  }
})
export default class Home extends Vue {
  messages: string
}

@Component<Home>({
  methods: {
    getd(){
      alert(this.messages) // ok
    }
  }
})
export default class Home extends Vue {
  messages: string
}

Alas, due to the peculiarities of the implementation of decorators, it will not work to deduce the type implicitly in such cases.