TypeError: "x" 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: Unable to get property {x} of undefined or null reference (Edge)
TypeError: null has no properties (Firefox)
TypeError: undefined has no properties (Firefox)
Error type
What went wrong?
Examples
null and undefined have no properties
null.foo;
// TypeError: null has no properties
undefined.bar;
// TypeError: undefined has no properties