Typescript working with asyncData & fetch for Nuxt.js

nuxt.d.ts

import Vue from 'vue'
import { Store } from 'vuex'

// ComponentOptions is declared in types/options.d.ts
declare module 'vue/types/options' {

    interface NuxtContext<V extends Vue> {
        app: V,
        isClient: boolean,
        isServer: boolean,
        isStatic: boolean,
        isDev: boolean,
        store: Store<any>, // Consider vuex-typex in future
        env: object,
        params: object,
        query: object
    }

    interface ComponentOptions<V extends Vue> {
        asyncData?(context: NuxtContext<V>): Promise<object> | object
        fetch?(context: NuxtContext<V>): Promise<object> | object
    }
}