JavaScript Error Reference Manual

Error object

The Error constructor function creates an error object. An instance of the Error object is thrown when a runtime error occurs.

The error object provides error information when an error occurs.

Example

try {
aaalert("Hello world");
}
document.getElementById("result").innerHTML = e.name　+　"<br>"　+　e.message;
}

You can test on ourInLearn more about errors in the JavaScript exception tutorial.

The following table lists the properties of the Error object:

Properties	Description
name	Set or return the error name
message	Set or return the error message

The global Error object does not contain its own methods, but it does indeed inherit some methods from the prototype chain.

JavaScript has seven core error constructor functions:

Type	Description
EvalError	Create an example that represents an error related to the global function eval()
InternalError	Create an example that represents an error that occurs when an internal error is triggered in the JavaScript engine
RangeError	Create an example that represents an error that occurs when a numeric variable or parameter exceeds its valid range
ReferenceError	Create an example that represents an error that occurs when dereferencing an invalid reference
SyntaxError	Create an example that represents a syntax error that occurs when parsing code in eval()
TypeError	Create an example that represents an error that occurs when the type of a variable or parameter is invalid
URIError	Create an example that represents an error that occurs when passing invalid parameters to encodeURI() or decodeURI()

Microsoft and Mozilla have defined some non-standard error object properties:

Do not use these properties, as they may not work in all browsers.