Why Does JSON.stringify Fail to Serialize Error Objects, and How Can I Fix It?

Is it not possible to stringify an Error using JSON.stringify?

When attempting to serialize an error message using JSON.stringify, you may encounter an unexpected result: an empty object. This behavior stems from the non-enumerable properties of the Error object, preventing them from being included in the stringification.

While standard methods like Error.prototype.toString offer limited information, using the replacer function in JSON.stringify to remove function properties encounters anomalies where it skips looping over the object.

The solution lies in passing an array of enumerable property names from the Error object as the second argument to JSON.stringify:

JSON.stringify(err, Object.getOwnPropertyNames(err))

This workaround effectively includes the necessary error properties in the stringification process, providing the desired result. It is important to note that this method is browser-dependent and may not work in all environments.

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