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TypeError: "x" has no properties - JavaScript | MDN

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TypeError: "x" has no properties

Сообщение

TypeError: Unable to get property {x} of undefined or null reference (Edge) TypeError: null has no properties (Firefox) TypeError: undefined has no properties (Firefox)

In this article

Тип ошибки

TypeError.

Что пошло не так?

У null и undefined нет свойств, к которым можно было бы обратиться.

Примеры

js
null.foo; // TypeError: null has no properties undefined.bar; // TypeError: undefined has no properties

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