Please note, this is a STATIC archive of website developer.mozilla.org from November 2016, cach3.com does not collect or store any user information, there is no "phishing" involved.

TypeError: "x" has no properties

Our volunteers haven't translated this article into Tiếng Việt yet. Join us and help get the job done!

Message

TypeError: null has no properties
TypeError: undefined has no properties

Error type

TypeError.

What went wrong?

Both, null and undefined, have no properties you could access.

Examples

null.foo;
// TypeError: null has no properties

undefined.bar;
// TypeError: undefined has no properties

See also

Document Tags and Contributors

 Contributors to this page: fscholz
 Last updated by: fscholz,