SyntaxError
BaselineWidely available *
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
* Some parts of this feature may have varying levels of support.
TheSyntaxError
object represents an error when trying to interpret syntactically invalid code. It is thrown when the JavaScript engine encounters tokens or token order that does not conform to the syntax of the language when parsing code.
SyntaxError
is aserializable object, so it can be cloned withstructuredClone()
or copied betweenWorkers usingpostMessage()
.
SyntaxError
is a subclass ofError
.
Constructor
SyntaxError()
Creates a new
SyntaxError
object.
Instance properties
Also inherits instance properties from its parentError
.
These properties are defined onSyntaxError.prototype
and shared by allSyntaxError
instances.
SyntaxError.prototype.constructor
The constructor function that created the instance object. For
SyntaxError
instances, the initial value is theSyntaxError
constructor.SyntaxError.prototype.name
Represents the name for the type of error. For
SyntaxError.prototype.name
, the initial value is"SyntaxError"
.
Instance methods
Inherits instance methods from its parentError
.
Examples
Catching a SyntaxError
try { eval("hoo bar");} catch (e) { console.log(e instanceof SyntaxError); // true console.log(e.message); console.log(e.name); // "SyntaxError" console.log(e.stack); // Stack of the error}
Creating a SyntaxError
try { throw new SyntaxError("Hello");} catch (e) { console.log(e instanceof SyntaxError); // true console.log(e.message); // "Hello" console.log(e.name); // "SyntaxError" console.log(e.stack); // Stack of the error}
Specifications
Specification |
---|
ECMAScript® 2026 Language Specification # sec-native-error-types-used-in-this-standard-syntaxerror |