Tengo una clase llamada Timer:

 class Timer { #tick() { console.error('Error usage of interface Timer explicitly deleted'); } startTimer() { console.error('Error usage of interface Timer explicitly deleted'); } }

Y tengo una clase llamada CyclingTimer que se deriva de Timer:

 class CyclingTimer extends Timer { #maximumTime #timeBetweenTicks #currentTime #onTick constructor(maximumTime, timeBetweenTicks) { super(); this.#maximumTime = maximumTime; this.#timeBetweenTicks = timeBetweenTicks; this.#currentTime = 1; } #validateBoundaries() { if(this.#currentTime > this.#maximumTime) this.#currentTime = 1; else if(this.#currentTime < 1) this.#currentTime = this.#maximumTime; } #tick() { //I console.log(this) here to debug and it printed the Window object as this. I don't know why this.#currentTime++; //Error Occures In This Line this.#validateBoundaries(); this.#onTick(); } startTimer() { //When I console.log(this) here it prints CyclingTimer as expected setInterval(this.#tick, this.#timeBetweenTicks); } setOnTickFunction(callbackFunction) { this.#onTick = callbackFunction; } }

No tengo idea de por qué sucede esto y estas son las únicas cosas que tengo. Cuando busqué sobre el error no encontré nada.