Cannot use an abstract class component as mixin

[julaudo]

My HelloWorld component is using Parent as a Mixin:

App.vue:

<template>
  <div id="app">
    <img alt="Vue logo" src="./assets/logo.png">
    <HelloWorld msg="Welcome to Your Vue.js + TypeScript App"/>
  </div>
</template>

<script lang="ts">
import { Component, Vue } from 'vue-property-decorator';
import HelloWorld from './components/HelloWorld.vue';

@Component({
  components: {
    HelloWorld,
  },
})
export default class App extends Vue {}
</script>

HelloWorld.vue:

<template>
  <div class="hello">
    <h1>{{ msg }}</h1>
  </div>
</template>

<script lang="ts">
import {Component, Mixins, Prop} from 'vue-property-decorator';
import Parent from '@/components/Parent';

@Component
export default class HelloWorld extends Mixins(Parent) {
  @Prop() private msg!: string;
}
</script>

Parent.ts

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

@Component
export default class Parent extends Vue {
    public value: string = '';
}

Everything is working fine.

But for my specific case, I would like to have abstract methods in Parent, so I'm making Parent class abstract itself. But as soon as I make Parent abstract, I get the following errors:

ERROR in WebstormProjects/untitled1/src/App.vue
13:3 Argument of type '{ components: { HelloWorld: typeof HelloWorld; }; }' is not assignable to parameter of type 'VueClass<Vue>'.
  Object literal may only specify known properties, but 'components' does not exist in type 'VueClass<Vue>'. Did you mean to write 'component'?
    11 | 
    12 | @Component({
  > 13 |   components: {
       |   ^
    14 |     HelloWorld,
    15 |   },
    16 | })
ERROR in WebstormProjects/untitled1/src/components/HelloWorld.vue
11:1 Unable to resolve signature of class decorator when called as an expression.
  Type '<VC extends VueClass<Vue>>(target: VC) => VC' is not assignable to type 'typeof HelloWorld'.
    Type '<VC extends VueClass<Vue>>(target: VC) => VC' provides no match for the signature 'new (): HelloWorld'.
     9 | import Parent from '@/components/Parent';
    10 | 
  > 11 | @Component
       | ^
    12 | export default class HelloWorld extends Mixins(Parent) {
    13 |   @Prop() private msg!: string;
    14 | }
ERROR in WebstormProjects/untitled1/src/components/HelloWorld.vue
12:48 Argument of type 'typeof Parent' is not assignable to parameter of type 'VueClass<Parent>'.
  Type 'typeof Parent' is not assignable to type 'new (...args: any[]) => Parent & Vue'.
    Cannot assign an abstract constructor type to a non-abstract constructor type.
    10 | 
    11 | @Component
  > 12 | export default class HelloWorld extends Mixins(Parent) {
       |                                                ^
    13 |   @Prop() private msg!: string;
    14 | }
    15 | </script>
ERROR in WebstormProjects/untitled1/src/components/Parent.ts
3:1 Unable to resolve signature of class decorator when called as an expression.
  Type '<VC extends VueClass<Vue>>(target: VC) => VC' is missing the following properties from type 'typeof Parent': extend, nextTick, set, delete, and 9 more.
    1 | import { Component, Vue } from 'vue-property-decorator';
    2 | 
  > 3 | @Component
      | ^
    4 | export default abstract class Parent extends Vue {
    5 |     public value: string = '';
    6 | }

Does it mean I cannot make my Mixin abstract?

[ktsn]

This is won't fix as we cannot detect whether the class is Vue constructor without new (): V signature.

[ktsn]

#91