Упрощает получение значение свойства article.data.cover.mobile
#1291
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Упрощает xот-фикс для картинок на главной. см: 4f92d3d
Задача: получить поле(строку)
article.data.cover.mobile
Необходимо:
article.data.cover
существует и является объектомmobile
и вернуть егоundefined
Для этого можем использовать оператор
?.
article.data.cover?.mobile
- вернётundefined
если:cover
не содержитmobile
cover
не является объектомтесты: