Returns or sets the numeric value associated with a specific error. The Error object's default property is number.

object.number [= errorNumber]

Arguments

object

Any instance of the Error object.

errorNumber

An integer representing an error.

Remarks

An error number is a 32-bit value. The upper 16-bit word is the facility code, while the lower word is the actual error code.

The following example illustrates the use of the number property:

try
   x = y   // Cause an error.
catch(var e){   // Create local variable e.
   document.write(e)   // Prints "[object Error]".
   document.write(e.number>>16 & 0x1FFF)   // Prints 10, the facility code.
   document.write(e.number & 0xFFFF)   // Prints 5009, the error code.
   document.write(e.description)   // Prints "'y' is undefined".
}

Requirements

Version 5

See Also

description Property | message Property | name Property

Applies To: Error Object