Why does the specification state "Error instances have no special properties"?
The ES5 specification states:
| 15.11.5 Properties of Error Instances
| Error instances inherit properties from the Error prototype
| object and their [[Class]] internal property value is
| "Error". Error instances have no special properties.
However error instances do have an own property: message. The value
obviously is not shared in the prototype (that would be a mistake).
javascript: alert(new Error("foo").hasOwnProperty("message"));
true
Garrett
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