# Errors > Errors.
## Usage ```javascript var ns = require( '@stdlib/error' ); ``` #### ns Errors. ```javascript var o = ns; // returns {...} ```
- [`reviveError( key, value )`][@stdlib/error/reviver]: revive a JSON-serialized error object. - [`error2json( error )`][@stdlib/error/to-json]: return a JSON representation of an error object.
## Examples ```javascript var objectKeys = require( '@stdlib/utils/keys' ); var ns = require( '@stdlib/error' ); console.log( objectKeys( ns ) ); ```