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TypeError: null/undefined has no properties - JavaScript | MDN
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TypeError: null/undefined has no properties
The JavaScript exception "null (or undefined) has no properties" occurs when you
attempt to access properties of null and undefined. They
don't have any.
Message
TypeError: Cannot read properties of undefined (reading 'x') (V8-based) TypeError: Cannot destructure 'x' as it is undefined. (V8-based) TypeError: Cannot destructure property 'x' of 'y' as it is undefined. (V8-based) TypeError: null has no properties (Firefox) TypeError: undefined has no properties (Firefox) TypeError: undefined is not an object (evaluating 'undefined.x') (Safari) TypeError: Right side of assignment cannot be destructured (Safari)
Error type
What went wrong?
Both null and undefined have no properties you could access. Therefore, you cannot use property accessors on them, or destructure them.
Examples
null and undefined have no properties
js
null.foo;
// TypeError: null has no properties
undefined.bar;
// TypeError: undefined has no properties