Вопрос 107

An ordinary object created with new Object is used directly on the right side of for...of. No iterator was added. What happens?

Its own values are visited automatically
Its own property names are visited automatically
A TypeError is thrown because the object is not iterableПравильный ответ
The loop runs zero times without reporting a problem

Объяснение

An ordinary object does not provide the iterable protocol by default, so for...of cannot consume it and throws a TypeError. Having enumerable properties is insufficient; arrays returned by Object.keys or related methods would be iterable instead.

Объяснение

Продолжить работу с тестом