This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.

msExtendedCode is a read-only proprietary property specific to Internet Explorer and Microsoft Edge.

msExtendedCode provides additional platform specific error code information.

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Contributors to this page: mattwojo, erikadoyle
Last updated by: mattwojo,