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import React from 'react'
interface Animal {
animalStuff: any
}
interface Dog extends Animal {
dogStuff: any
}
class AnimalHouse {
resident: Animal
constructor(animal: Animal) {
this.resident = animal
}
}
class DogHouse extends AnimalHouse {
// Initializes 'resident' to 'undefined'
// after the call to 'super()' when
// using 'useDefineForClassFields'!
// @ts-ignore
resident: Dog
// useless constructor only for type checker
/* eslint-disable @typescript-eslint/no-useless-constructor */
constructor(dog: Dog) {
super(dog)
}
}
class DogHouseWithDeclare extends AnimalHouse {
declare resident: Dog
// useless constructor only for type checker
/* eslint-disable @typescript-eslint/no-useless-constructor */
constructor(dog: Dog) {
super(dog)
}
}
export default function AnimalView() {
const dog = new DogHouse({
animalStuff: 'animal',
dogStuff: 'dog',
})
const dogDeclare = new DogHouseWithDeclare({
animalStuff: 'animal',
dogStuff: 'dog',
})
return (
<>
<div id={'dog'}>{dog.resident}</div>
<div id={'dogDecl'}>{dogDeclare.resident?.dogStuff}</div>
</>
)
}
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